WO2023280173A1

WO2023280173A1 - Scanning method and electronic device

Info

Publication number: WO2023280173A1
Application number: PCT/CN2022/103979
Authority: WO
Inventors: 李军; 龚胜波; 王征; 李阜
Original assignee: 华为技术有限公司
Priority date: 2021-07-09
Filing date: 2022-07-05
Publication date: 2023-01-12
Also published as: CN115604399A

Abstract

Embodiments of the present application provide a scanning method and an electronic device, which are applied to the technical field of scanning; the content of a scanning surface can be scanned by using an associated scanning policy according to the placement state of the scanning surface. When the placement state of the scanning surface is different, scanning control of the scanning surface changes, thereby improving the automation and intelligence of scanning. The embodiments comprise: determining the placement state of a scanning surface of an object to be scanned; and, according to the placement state of the scanning surface, scanning the content of the scanning surface by using a scanning policy associated with the placement state, and obtaining a scanned image.

Description

Scanning method and electronic device

This application claims the priority of a Chinese patent with the application number 202110779216.2 and the title of the invention "Scanning Method and Electronic Device" filed with the China Patent Office on July 9, 2021, the entire contents of which are incorporated herein by reference.

technical field

Embodiments of the present application relate to the technical field of scanning, and in particular, to a scanning method and electronic equipment.

Background technique

Electronic devices with scanning functions (image scanning devices) are widely used in many occasions. A problem existing in conventional image scanning equipment is that, when the image scanning equipment scans a book, the spine of the book is above the scanning surface, and the scanned image is distorted, shadowed, and blurred corresponding to the spine area, and the imaging quality of the spine area is poor. , especially for relatively thick books. At this time, the user needs to manually press and pave, and the operation is complicated, but the scanning and imaging effect cannot be guaranteed. That is to say, the scanning automation of conventional image scanning equipment is not high, which is not conducive to the improvement of image quality.

Contents of the invention

The embodiment of the present application discloses a scanning method and electronic equipment. When the scanning surface is placed in different states, the scanning control of the scanning surface is changed. This avoids scanning the scanning surface with the same scanning strategy, resulting in differences in areas of different shapes on the scanning surface after imaging the scanning surface. It solves the problems of image distortion, shadow and blur in the curved area on the scanning surface, and improves the scanning image quality. Solving the problem of poor scanning imaging quality at the source can ensure the improvement of scanning imaging quality and improve the automation and intelligence of scanning.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

On the one hand, the embodiment of the present application provides a display method, including: determining the placement state of the scanning surface of the object to be scanned; according to the placement state of the scanning surface, using the scanning strategy associated with the placement state to scan Scan to obtain the scanned image.

Wherein, when the scanning surface is in different placement states, the scanning strategies for scanning the scanning surface are different. Wherein, the arrangement state of the scanning surface may include the arrangement position of the scanning surface, the arrangement angle of the scanning surface and/or the shape of the scanning surface, wherein the arrangement position of the scanning surface includes the position of the scanning surface. The placement angle of the scanning surface is relative to the preset horizontal reference. The shape of the scanning surface is the shape presented by the scanning surface, and the shape presented by the scanning surface includes a curved shape and/or a non-curved shape.

In the embodiment of the present application, the content of the scanning surface is scanned with the scanning strategy associated with the placement state of the scanning surface, which avoids scanning the scanning surface with the same scanning strategy, resulting in areas of different shapes on the scanning surface after imaging the scanning surface There is a difference. Furthermore, by planning a corresponding scanning path according to the placement position of the scanning surface, the content on the scanning surface can be scanned more efficiently and comprehensively. The corresponding scanning direction is determined according to the placement angle of the scanning surface, so that the subsequent scanning of the scanning surface can be better controlled. Obtain the shape of the currently scanned area in real time to control the scanning of the area according to the shape of the currently scanned area. For example, the degree of curvature of the currently scanned area relative to the plane can be obtained in real time, and the scanning is controlled according to the degree of curvature. It solves the problems of image distortion, shadow and blur in the curved area on the scanning surface, and improves the scanning image quality. Solving the problem of poor scanning imaging quality at the source can ensure the improvement of scanning imaging quality and improve the automation and intelligence of scanning.

In a possible design, the arrangement state of the scanning surface includes the bending state of the scanning surface, and the scanning surface includes a first area and a second area; the degrees of curvature corresponding to the first area and the second area are different; the scanning strategy includes scanning components According to the placement state of the scanning surface, scan the content of the scanning surface with a scanning strategy related to the placement state, specifically including: according to the curvature of the first area and the second area, at different moving rates Scan the first area and the second area.

Wherein, the curved state of the scanning surface may also be referred to as the curved shape of the scanning surface, and the degree of curvature of the scanning surface can be obtained according to the curved shape. That is to say, scan areas with different degrees of curvature on the scanning surface at different moving rates to ensure that the scanning surface is scanned more fully, to ensure clear imaging, to prevent the curved area from being scanned, and to solve the imaging distortion of the curved area, There are shadows and blurry issues.

In another possible design, the second moving rate is a rate obtained according to the first moving rate and the bending state of the bending region. That is, according to the principle of turning a curve into a straight line, the second moving rate can be obtained according to the first moving rate and the bending state of the curved region.

In another possible design, the scanning strategy also includes the orientation of the scanning component; according to the placement state of the scanning surface, scanning the content of the scanning surface with a scanning strategy related to the placement state further includes: according to the first area and the degree of curvature of the second area, the scanning component scans the first area and the second area in different orientations.

That is to say, for areas with different degrees of curvature on the scanning surface, the scanning components scan in different directions.

In another possible design, the scanning component includes a light source and a first reflector, and the orientation of the scanning component includes a direction in which the light source emits scanning light, and/or, the orientation of the first reflector.

That is to say, for regions with different degrees of curvature on the scanning surface, the direction in which the light source emits scanning light is different, that is, the direction in which the scanning light is incident on the scanning surface is different. Ensure that the angle at which the scanning light is incident on the scanning surface is constant, that is, ensure that the scanning light is incident on areas with different degrees of curvature on the scanning surface in a constant emission direction. Then the scanning light scans the areas with different degrees of curvature on the scanning surface in the same way, ensuring that the light intensity of the scanning light received by areas with different degrees of curvature on the scanning surface is the same, ensuring clear imaging, avoiding that the curved area is not scanned, and solving the problem of imaging in the curved area Distorted, shadowed, and blurry issues. And/or, adjust the orientation of the first reflector to ensure that the first reflector can receive the scanning light and completely reflect the scanning light.

In another possible design, according to the degree of curvature of the first area and the second area, the scanning component scans the first area and the second area in different orientations includes: when scanning the first area, controlling the light source and the The carrier of the object to be scanned forms a second included angle; when scanning the second area, the control light source and the carrier form a third included angle; wherein the second included angle is different from the third included angle. That is to say, when the angle between the scanning light and the scanning surface is guaranteed to be the first angle, and the non-curved area can be scanned, the scanning light is controlled to form a second angle with the carrier for carrying the object to be scanned, and the curved area is scanned. When , control the scanning light to form a third angle with the carrier for carrying the object to be scanned.

In another possible design, the third included angle is an angle obtained according to the second included angle and the bending state of the bending region. That is to say, in the non-curved area, the first included angle is the same as the second included angle, and the angle between the scanning light and the scanning surface is guaranteed to be the first included angle. According to the principle of light reflection, the third included angle is based on the second included angle. The angles obtained from the bend state of the corner and bend regions.

In another possible design, according to the degree of curvature of the first area and the second area, the scanning component scans the first area and the second area in different orientations includes: when scanning the first area, controlling the first reflector and The carrier forms a fourth included angle; when scanning the second area, the first reflector and the carrier are controlled to form a fifth included angle, wherein the fourth included angle is different from the fifth included angle. That is, after adjusting the incident direction of the scanning light, in order to ensure that the first reflector can receive the scanning light and reflect the scanning light to the photoelectric conversion element, the first reflector needs to be adjusted. According to the principle of light reflection, the fourth included angle is obtained from the first included angle, the first included angle is equal to the second included angle, and the fifth included angle is obtained from the first included angle and the bending state of the bending region.

In another possible design, the placement state of the scanning surface includes the placement angle of the scanning surface or the placement angle of the content in the scanning surface, and the scanning strategy includes the scanning direction of the scanning components; according to the placement state of the scanning surface, the The scanning strategy related to the placement status scans the contents of the scanning surface, specifically including: adjusting the scanning direction of the scanning component according to the placement angle of the scanning surface or the placement angle of the content in the scanning surface.

That is to say, the scanning direction can be set according to the placement of the scanning surface, so that the scanning can completely scan the scanning surface, and the scanning direction can be adjusted according to the placement angle of the content on the scanning surface, that is, the sorting direction of the text on the scanning surface, which can better Scan to content on the scanning surface.

In another possible design, the scanning component includes a light source and a first reflector; adjusting the scanning direction of the scanning component specifically includes: adjusting the moving direction of the light source; and/or adjusting the moving direction of the first reflector. That is, the light source and the first reflector are controlled to move along the scanning direction, and the moving direction of the light source and the first reflector is the scanning direction.

In another possible design, the placement state of the scanning surface includes the placement position of the scanning surface, the scanning strategy includes the moving path of the scanning component, and the moving path includes the scanning start point and the scanning end point; according to the placement state of the scanning surface, the The scanning strategy related to the placement state scans the content of the scanning surface, specifically including: adjusting the moving path of the light source according to the placement position of the scanning surface. That is, the scanning path is determined according to the placement position of the scanning surface, so as to scan the scanning surface more comprehensively and reduce scanning power consumption.

In another possible design, determining the arrangement state of the scanning surface of the object to be scanned includes: obtaining the curvature of the scanning surface to obtain the curvature state of the scanning surface. The curved state of the scanning surface can be obtained from the curvature of the scanning surface.

In another possible design, determining the placement state of the scanning surface of the object to be scanned includes: performing text detection on the scanning surface to obtain a text box; obtaining a curve on the scanning surface according to the text box; determining the scanning surface according to the slope of the curve. The curved state of the face. The curved state of the scanning surface can be obtained from the slope of the scanning surface.

In yet another aspect, an embodiment of the present application provides a scanning device, including: a carrier for carrying an object to be scanned; a light source for emitting scanning light to the scanning surface of the object to be scanned; a first reflector for receiving The light reflected from the scanning surface, and reflects the light to the photoelectric conversion element; the photoelectric conversion element is used to convert the received light into image data to obtain the image scanned by the scanning surface; the controller is used to control the scanning device according to the The placement state of the scanning surface, the contents of the scanning surface are scanned according to the scanning strategy associated with the placement state. Wherein, when the scanning surface is in different placement states, the scanning strategies for scanning the scanning surface are different.

In the embodiment of the present application, the controller controls the scanning component to scan the content of the scanning surface based on the scanning strategy associated with the placement state of the scanning surface, which prevents the scanning component from scanning the scanning surface with the same scanning strategy, resulting in imaging of the scanning surface. Differences appear in areas of different shapes on the rear scan surface. It solves the problems of image distortion, shadow and blur in the curved area on the scanning surface, and improves the scanning image quality. Solving the problem of poor scanning imaging quality at the source can ensure the improvement of scanning imaging quality and improve the automation and intelligence of scanning.

In another possible design, the arrangement state of the scanning surface includes the bending state of the scanning surface, and the scanning surface includes a first area and a second area; the degrees of curvature corresponding to the first area and the second area are different; the scanning strategy includes scanning The moving rate of the components; the controller is used to control the scanning device to scan the content of the scanning surface according to the placement state of the scanning surface with the scanning strategy associated with the placement state, specifically including: The degree of curvature controls the light source to scan the first area and the second area at different moving speeds. Control the light source to move at different speeds to ensure that the scanning light emitted by the light source fully illuminates the scanning surface.

In another possible design, the first area is a non-curved area, and the second area is a curved area; the controller controls the light source to scan the first area and the second area at different moving rates according to the degree of curvature of the first area and the second area. The second area specifically includes: the controller controls the light source to scan the first area at a first moving rate; the controller controls the light source to scan the second area at a second moving rate, wherein the first moving rate is greater than the second moving rate. The light source scans areas with different degrees of curvature on the scanning surface at different moving speeds to ensure that within the same period of time, the distance of the scanning light passing through the curved area and the non-curving area on the scanning surface is the same or close, and the scanning light can fully scan the scanning surface The information on the curved area reduces the shadow and deformation of the scanning image in the curved area of the scanning surface.

In another possible design, the second moving rate is a rate obtained according to the first moving rate and the bending state of the bending region.

In another possible design, the scanning strategy also includes the orientation of the scanning component; the controller is used to control the scanning device to scan the content of the scanning surface according to the scanning strategy associated with the placement state according to the placement state of the scanning surface, and also The method includes: the controller controls the light source to scan the first area and the second area in different orientations according to the degree of curvature of the first area and the second area. Controlling the orientation of the light source means controlling the emission direction of the scanning light incident on the scanning surface, so as to ensure that the scanning light can more fully irradiate areas with different degrees of curvature on the scanning surface.

In another possible design, the controller controls the light source to scan the first area and the second area in different orientations according to the degree of curvature of the first area and the second area, including: when scanning the first area, the controller controls The light source forms a second included angle with the carrier for carrying the object to be scanned; when scanning the second area, the controller controls the light source and the carrier to form a third included angle; wherein the second included angle is different from the third included angle.

In another possible design, the third included angle is an angle obtained according to the second included angle and the bending state of the bending region.

In another possible design, the controller is also used to: when scanning the first area, control the first reflector and the carrier to form a fourth angle; when scanning the second area, control the first reflector and the carrier body forms a fifth included angle, wherein the fourth included angle is different from the fifth included angle.

In another possible design, the arrangement status of the scanning surface includes the arrangement angle of the scanning surface or the arrangement angle of the content on the scanning surface, and the scanning strategy includes the scanning direction of the light source; the controller is specifically used to: The placement angle or the placement angle of the content in the scanning surface adjusts the scanning direction of the light source. Adjusting the scanning direction of the light source according to the placement angle of the scanning surface can scan the scanning surface more fully. According to the arrangement angle of the content on the scanning surface, the content on the scanning surface can be scanned more fully.

In another possible design, the placement state of the scanning surface includes the placement position of the scanning surface, the scanning strategy includes the moving path of the scanning component, and the moving path includes the scanning start point and the scanning end point; the controller is specifically used to: Adjust the placement position of the light source and adjust the moving path of the light source. Adjust the path of the light source to ensure that the scanning components start working at the proper position and reduce power consumption.

In another possible design, determining the arrangement state of the scanning surface of the object to be scanned includes: obtaining the curvature of the scanning surface to obtain the curvature state of the scanning surface.

In another possible design, the controller determines the placement state of the scanning surface of the object to be scanned, including: performing text detection on the scanning surface to obtain a text box; obtaining a curve on the scanning surface according to the text box; according to the slope of the curve, Determines the curvature state of the scanned surface.

In another aspect, an embodiment of the present application provides an image forming device, including: any one of the above scanning devices; an imaging device, configured to read image data output by the scanning device, and print a recording medium based on the image data; The control device is used for controlling the scanning device and the imaging device.

In yet another aspect, the embodiment of the present application provides an electronic device, including a processor, a memory, and a scanning component; the memory is used to store instructions; the processor is used to call the instructions in the memory, and control the scanning component to scan, so that The electronic device executes any one of the scanning methods above.

In yet another aspect, an embodiment of the present application provides a computer-readable storage medium, where at least one instruction is stored in the computer-readable storage medium, and when the at least one instruction is executed by a processor, any one of the above scanning methods is implemented.

For the beneficial effects corresponding to the above-mentioned other aspects, please refer to the description of the beneficial effects of the method, which will not be repeated here.

Description of drawings

FIG. 1 is a schematic structural diagram of a conventional image scanning device.

FIG. 2 is a schematic diagram of a scanning result of a conventional image scanning device.

FIG. 3 is a schematic structural diagram of a scanning device provided by an embodiment of the present application.

FIG. 4 is a schematic structural diagram of another scanning device provided by an embodiment of the present application.

FIG. 5 is a schematic flowchart of a scanning method provided by an embodiment of the present application.

FIG. 6 is a schematic diagram of a scanning surface provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of an object to be scanned tilted according to an embodiment of the present application.

FIG. 8 is a schematic diagram of a scanning path provided by an embodiment of the present application.

FIG. 9 is a schematic diagram of a reset path provided by an embodiment of the present application.

Fig. 10a is a schematic diagram of a text box provided by an embodiment of the present application.

Fig. 10b is a schematic diagram of the OCR model provided by the embodiment of the present application.

FIG. 11 is a schematic diagram of a text box on a scanning surface provided by an embodiment of the present application.

FIG. 12 is a schematic diagram of a central curve of a text box provided by an embodiment of the present application.

FIG. 13 is a schematic diagram of scanning path planning provided by the embodiment of the present application.

FIG. 14 is a schematic diagram of a scanning optical path provided by an embodiment of the present application.

FIG. 15 is a schematic diagram of another scanning optical path provided by the embodiment of the present application.

Fig. 16 is a schematic diagram of a typesetting process provided by the embodiment of the present application.

Fig. 17 is a schematic layout diagram of an ID card provided by the embodiment of the present application.

FIG. 18 is a schematic structural diagram of an image forming apparatus provided by an embodiment of the present application.

FIG. 19 is a schematic diagram of a printing process provided by an embodiment of the present application.

detailed description

It should be noted that in the embodiments of the present application, "at least one" refers to one or more, and "multiple" refers to two or more than two. "And/or" describes the association relationship of associated objects, indicating that there can be three types of relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B Can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of this application and the drawings are used to distinguish similar objects, not to Describe a specific order or sequence.

Before explaining the embodiment of the present application in detail, the application scenarios involved in the embodiment of the present application will be introduced first.

Referring to Fig. 1, a conventional image scanning device 100 includes a glass table 1 on which an object to be scanned can be placed, a fluorescent lamp 2, a prism 3 and a photoelectric conversion element 4, the moving direction and the moving speed of the fluorescent lamp 2 and the prism 3 are fixed, and the fluorescent lamp 2 and prism 3 can only reciprocate along the direction I in Figure 1. The user places the book 5 on the glass table 1 and lets the image scanning device 100 perform a scanning operation. The fluorescent lamp 2 and the prism 3 move from the starting position to the ending position along the direction I at the same time, and the scanning light emitted by the fluorescent lamp 2 passes through the glass table 1. The scanning surface of the book 5 is irradiated, and the surface of the book 5 facing the glass table 1 and receiving the scanning light is the scanning surface. The scanning surface reflects the scanning light to the prism 3, and the prism 3 receives the scanning light carrying the scanning surface information, and then the prism 3 reflects the received scanning light to the photoelectric conversion element 4, and the photoelectric conversion element 4 converts the received scanning light It is converted into a digital signal to obtain the image data of the scanned surface, and a scanned image can be obtained according to the image data. The area of the spine 6 on the scanning surface may be separated from the glass table 1 by a certain distance, and in the obtained scanned image, the image of the adjacent area of the spine 6 may be distorted and appear relatively dark. As shown in Figure 2, the adjacent area of the spine 6 The image for has shadows and is blurry. For a relatively thick book, the text content in the image of the adjacent area of the spine 6 will also be deformed.

In view of this, in order to improve the quality of scanning and imaging, the embodiment of the present application provides a scanning method, the scanning method includes determining the scanning surface of the object to be scanned, and then controlling the scanning of the scanning surface according to the placement state of the scanning surface, that is, with The scanning policy associated with the placement state scans the contents of the scanning surface. When the scanning surface is in different placement states, the scanning strategies for scanning the scanning surface are different. Wherein, the arrangement state of the scanning surface may include the arrangement position of the scanning surface, the arrangement angle of the scanning surface and/or the shape of the scanning surface, wherein the arrangement position of the scanning surface includes the position of the scanning surface. The placement angle of the scanning surface is relative to the preset horizontal reference. The shape of the scanning surface is the shape presented by the scanning surface, and the shape presented by the scanning surface includes a curved shape and/or a non-curved shape.

When the positions of the scanning surfaces are different, the scanning strategies for scanning the scanning surfaces are different. For example, the scanning paths planned for the scanning surfaces are different, that is, the scanning starting point and the scanning end point of scanning the scanning surfaces are different. When the scanning surface is placed at different angles, the scanning strategy for scanning the scanning surface is different, for example, the scanning direction for the scanning surface is different. When the scanning surface has different shapes, the scanning strategy for scanning the scanning surface is different, for example, the moving speed of the scanning component is different when scanning the scanning surface. Or, when the scanning component scans the scanning surface, the emitting directions of the scanning light are different, or, when the scanning component scans the scanning surface, the reflecting directions of the scanning light are different. Wherein, the emission direction and the reflection direction are the propagation directions of the scanning light, and the emission direction is the propagation direction of the scanning light to the scanning surface after the light source emits the scanning light. The reflection direction is the propagation direction of the scanning light reflected by the scanning surface after being reflected by the first reflector. When the shape of the scanning surface includes a curved shape, that is, the scanning surface has a curved area (hereinafter referred to as a curved area), and may also include a non-curved area (hereinafter referred to as a non-curved area). The scanning of the curved area is controlled according to the scanning strategy associated with the curved shape of the curved area. For example, different areas have different bending degrees and different scanning rates.

That is, in the embodiment of the present application, the scanning strategies are different when the arrangement states of the scanning surfaces are different. Therefore, based on the scanning method of the embodiment of the present application, the problem of poor scanning and imaging quality can be solved at the source, the scanning and imaging quality can be improved, and the automation and intelligence of scanning can be improved.

An embodiment of the present application provides a scanning method, which can be executed by a scanning device. It can be understood that the scanning device may be presented in different product forms in different scenarios. The functionality of the scanning means may be implemented by software means. It can also be realized by hardware devices, and can also be realized by a combination of software devices and hardware devices.

The scanning method of the embodiment of the present application can be performed by hardware equipment, for example, please refer to FIG. The scanning component 202 controlled by the controller.

As shown in FIG. 3 , the object to be scanned 300 is placed on the carrier 201 , and the scanning surface 310 of the object to be scanned 300 is the surface of the object to be scanned 300 close to the carrier 201 , and the surface receives scanning by the scanning component 202 . The scanning surface contains the content that needs to be scanned currently. The scanning surface 310 includes a first area and a second area, and the degree of curvature corresponding to the first area and the second area is different, such as the first area can be a non-curved area (such as the rectangular frame 1 (A ₁ A ₂ A ₅₁ A in Fig. 3 ₅₂ ), or rectangular frame 2 (A ₃ A ₄ A ₆₁ A ₆₂ ), or a sub-area in rectangular frame 1 or 2), the second area can be a curved area (as shown in Figure 3 area (A ₅₁ A ₅₂ A ₆₁ A ₆₂ ), or any sub-area within the area). Optionally, both the first region and the second region may also be curved regions, but the degrees of curvature of these two regions are different, for example, two different degrees of curvature in the regions (A ₅₁ A ₅₂ A ₆₁ A ₆₂ ) in FIG. 3 Area.

Wherein, the carrier 201 includes a transparent platform, such as a flat glass platform composed of transparent glass. The material and form of the carrier 201 are not specifically limited in this embodiment of the present application.

Wherein, the scanning device 200 may execute the scanning method provided by the embodiment of the present application through a controller. For example, the controller acquires the placement state of the scanning surface 310 of the object 300 to be scanned, and then controls the scanning of the scanning surface 310 according to the placement state of the scanning surface 310 of the object 300 to be scanned, so as to realize the scanning of the content on the scanning surface 310 .

In a practicable manner, the controller may obtain the placement state of the scanning surface 310 in the following manner:

The controller first controls the scanning component 202 to pre-scan the object 300 to be scanned to obtain a pre-scanned image of the object 300 to be scanned, perform image processing on the pre-scanned image, and identify the image area of the object 300 to be scanned in the pre-scanned image. The image area of the object 300 to be scanned in the pre-scanned image is the scanned area of the scanning surface 310 . Therefore, the image area of the object to be scanned 300 in the pre-scanned image is the image area of the scanning surface 310 (hereinafter referred to as the scanning area area), and the controller can determine the scanning surface 310 of the object to be scanned 300 according to the image area of the scanning surface 310 .

The controller extracts features that can express the curved shape of the scanning surface 310 from the scanning surface area, such as extracting the arrangement of content (such as text) in the pre-scanned image, and then determines the curved shape of the scanning surface 310 according to the characteristics of the content arrangement .

The controller may also determine the area occupied by the scan surface area in the pre-scan image, and determine the position area of the scan surface 310 of the object to be scanned 300 on the carrier 201 according to the position area of the scan surface area in the pre-scan image, Furthermore, the placement position of the scanning surface 310 can be obtained. As shown in FIG. 3 , the area of the carrier 201 is the area formed by the coordinates ( _xi , y _i ) (i=1, 2, 3, 4) of the four points of the rectangular frame B _i , and the area of the scanning surface 310 is The area formed by the coordinates (x _i , y _i ) (i=1, 2, 3, 4) of the four points of the rectangular border A _i . The placement position of the scanning surface 310 on the carrier 201 can be obtained according to the coordinates of the rectangular frame (B ₁ B ₂ B ₃ B ₄ ).

Further, the controller can obtain the placement angle of the scanning surface 310 according to the placement position of the scanning surface 310 and a preset horizontal reference.

For details on how to obtain the placement state of the scanning surface 310 , please refer to the scanning method provided in the following embodiments of the present application. It can be understood that the acquisition of the shape of the scanning surface 310 is not limited to the above method, which is not specifically limited in this embodiment of the present application.

The scanning device and the scanning method according to the embodiments of the present application will be described in detail below with reference to FIG. 3 .

The scanning component 202 of the scanning device 200 includes a light source 212, a first reflector 222, a photoelectric conversion element 232 and a driving component (not shown). The scanning component 202 may be disposed above or below the carrier 201, or in other directions, which is not specifically limited in this embodiment of the present application. The following solutions are illustrated by taking the scanning component 202 disposed under the carrier 201 as an example.

The light source 212 can emit scanning light, and the scanning light penetrates the transparent part of the carrier 201 and irradiates to the scanning surface 310 of the object to be scanned 300, and the scanning surface 310 reflects the scanning light to the first reflector 222, and the first reflector 222 will reflect The scanning light on it is reflected to the photoelectric conversion element 232 , and the photoelectric conversion element 232 converts the received scanning light into a digital signal to obtain the image data of the scanning surface 310 to realize scanning the contents of the scanning surface 310 .

Wherein, the light source 212 can be one of lasers, fluorescent tubes, light emitting diode assemblies, tungsten lamps and any combination thereof, or the light source 212 can be one of lasers, fluorescent tubes, light emitting diode assemblies, tungsten lamps and any combination thereof One and the control assembly.

In the embodiment of the present application, in addition to the reciprocating movement of the light source 212 along the initial scanning direction J, the light source 212 can also be adjusted as follows:

During the scanning process, the moving speed of the light source 212 is adjustable, that is, the light source 212 does not move at a constant speed during the scanning process. For example, when scanning a non-curved area (such as the rectangular frame (A ₁ A ₂ A ₅₁ A ₅₂ ) or rectangular frame (A ₃ A ₄ A ₆₁ A ₆₂ ) in Figure 3) and a curved area (such as the rectangular frame (A ₅₁ A ₅₂ A ₆₁ A ₆₂ )) the movement speed is different. The light source 212 scans the non-curved area at a first moving rate, and the light source 212 scans the curved area at a second moving rate, wherein the first moving rate is greater than the second moving rate, that is, the light source 212 scans the curved area at a slower moving rate. If the scanning surface 310 includes curved regions with different degrees of curvature, the light source 212 scans the curved region with a greater degree of curvature at a slower moving speed. If the light source 212 scans areas with different degrees of curvature at the same moving rate, the light source 212 undergoes the same displacement at the same time at the same moving rate, but the area of the light source 212 passing through the curved area on the scanning surface 310 is larger than the area of the non-curved area, or When the light source 212 undergoes the same displacement, the expanded area or length of the curved region on the scanning surface 310 is larger than the area or length of the non-curved region. Then, in the same time period, the area that the scanning light can sufficiently scan the non-curved area is smaller than the area of the curved area, and correspondingly, less content can be fully scanned on the scanning surface 310 . For this reason, the light source 212 scans the curved area and the non-curved area on the scanning surface at different moving rates, or the light source 212 scans the areas with different degrees of curvature on the scanning surface at different moving rates, so as to ensure that the scanning light passes through the scanning area at the same time. The path of the curved area on the surface 310 is the same or close to that of the non-curved area, that is, the path of the curved area when it is unfolded into a non-curved shape is the same or close to the path of the non-curved area, then the scanning light can fully scan the curved area of the scanning surface 310 information on the scanning surface 310 to reduce the shadow and deformation of scanning imaging in the curved area. Wherein, the curved area is the area on the scanning surface 310 that is attached to the carrier 201 , and the non-bending area is the area on the scanning surface 310 that is not attached to the carrier 201 .

In one possible implementation manner, the light source 212 may include a light source body 213 and a control component or a driving component for controlling the light source body 213 . As shown in FIG. 3 , the light source 212 further includes a first control component 214 , the first control component 214 can control the light source body 213 according to the signal output by the controller, so as to adjust the moving speed of the light source body 213 . The light source 212 may also include a corresponding driving component (not shown), which is used to drive the light source body 213 and the first control component 214 according to the signal output by the controller, so as to adjust the moving speed of the light source body 213 .

Further, the position of the light source 212 can be adjusted. The light source 212 can adjust the scanning path according to the position of the scanning surface 310 of the object 300 to be scanned. For example, the starting position of the scanning of the light source 212 can be adjusted, and the end position of the scanning of the light source 212 can also be adjusted. Specifically, as shown in FIG. 3 , the scanning starting point of the light source 212 can be adjusted to the position corresponding to the frame A ₁ A ₂ of the scanning surface 310 , and the scanning end point can be adjusted to the position corresponding to the frame A ₃ A ₄ of the scanning surface 310 . During the scanning process, the light source 212 moves from the position corresponding to the frame A ₁ A ₂ to the position corresponding to the frame A ₃ A ₄ . By adjusting the scanning start point and the scanning end point of the light source 212, the content on the scanning surface 310 can be scanned more efficiently and power consumption can be reduced.

In one possible implementation manner, the controller can adjust the position of the light source body 213 through the first control component 214 or the driving component. The drive assembly or first control assembly 214 may be part of the controller.

Optionally, due to the adjustment of the position of the light source 212 , it is possible that the end point of the light source 212 approaches or exceeds the boundary of the scanning device 200 during the scanning movement, for example, exceeds the boundary of the plane where the carrier 201 is located. Therefore, during the scanning process of the light source 212, it is detected whether the position of the light source 212 exceeds the space range allowed to move, if it reaches the boundary allowed to move, or before reaching the boundary, keep the placement angle of the light source 212 unchanged, and translate the light source 212, and make the light source 212 continue to move in the direction before translation to complete the scan. If it is detected that any part of the light source 212 is about to approach the plane where the frame B ₁ B ₃ is located during the moving process of the light source 212, then keep the placement angle of the light source 212 and move to the direction where the frame B ₂ B ₄ is located. By adjusting the position of the light source 212 during scanning, it is ensured that no mechanical collisions are found.

In a practicable manner, the placement angle of the light source 212 can be adjusted. The placement angle of the light source 212 can be adjusted according to the placement angle of the scanning surface 310 . If the horizontal frame B ₁ B ₃ of the carrier 201 is used as a preset horizontal reference, the placement angle of the scanning surface 310 is the sandwich between the horizontal frame A ₂ A ₄ and the horizontal frame B ₁ B ₃ of the scanning surface 310 horn. Or, taking the vertical frame B ₁ B ₂ of the carrier 201 as the preset horizontal reference, the placement angle of the scanning surface 310 is that the vertical frame A ₁ A ₂ and the vertical frame B ₁ B ₂ of the scanning surface 310 are angle between. The horizontal datum may also be other reference objects or reference coordinate systems, which are not specifically limited in this embodiment of the present application.

As shown in Figure 3, the light source 212 is parallel to the vertical frame B ₁ B ₂ of the carrier 201, if the placement angle of the scanning surface 310 is 30 degrees, adjust the placement angle of the light source 212 to be 30 degrees, that is, rotate the light source 212 by 30 degrees degrees, so that the rotated light source 212 is parallel to the vertical frame B ₁ B ₂ of the scanning plane 310 , or makes the rotated light source 212 perpendicular to the horizontal frame B ₁ B ₃ of the scanning plane 310 . By adjusting the placement angle of the light source 212 , it is ensured that the scanning light emitted by the light source 212 can more fully irradiate the content on the scanning surface 310 .

In one possible implementation manner, the controller can adjust the placement angle of the light source body 213 through the first control component 214 or the driving component.

As shown in FIG. 3 , in the plane where the light source body 213 scans forward, that is, in the plane where the light source body 213 advances along the initial scanning direction J, the light source body 213 can be translated along the direction C to adjust the swing of the light source body 213. put angle. The controller outputs the placement angle of the scanning surface to the first control component 214, and the first control component 214 adjusts the placement angle of the light source body 213, such as tilting the angle of the light source body 213 along the direction C, so that the light source body 213 is the fluorescent tube body Vertical to the scanning direction, or make the light source body 213 parallel to the vertical frame A ₁ A ₂ of the scanning surface 310 , or make the light source body 213 perpendicular to the text direction on the scanning surface 310 . Ensure that the moving direction of the scanning light emitted by the light source body 213 is consistent with the direction of the text on the scanning surface 310 .

In one implementable manner, the moving direction of the light source 212 can be adjusted. The moving direction of the light source 212 is the scanning direction of the scanning device 200 . The light source 212 can move and scan along the frame direction of the scanning surface 310 , such as the frame A ₂ A ₄ direction. Alternatively, the light source 212 can move and scan along the arrangement direction of the contents on the scanning surface 310 , for example, the direction of characters. If the placement angle of the scanning surface 310 changes, the placement angle and moving direction of the light source 212 can be adjusted according to the placement angle of the scanning surface 310 . When the scanning direction is set according to the frame of the scanning surface 310 , the light source 212 can scan the scanning surface 310 more fully. When the scanning direction is set according to the direction of the text, the scanning light emitted by the light source 212 can more fully irradiate the text on the scanning surface 310 .

In one possible implementation manner, the direction of the light source 212 can be adjusted. By adjusting the direction of the light source 212 to change the emission direction of the scanning light emitted by the light source 212, it is ensured that the scanning light can more fully irradiate the content on the scanning surface. As shown in FIG. 3 , the orientation of the light source body 213 can be adjusted. The light emitting area 215 is an area on the light source body 213 that emits scanning light. Taking the central line of the fluorescent tube as the axis H, and rotating the fluorescent tube around the axis H, the direction of the light emitting area 215 changes, and the light emitting area 215 can emit scanning light in a predetermined direction, that is, the light source 212 can rotate around the axis H in the direction B The rotation deflects and scans the scanning light emitted by the light source body 213 to a predetermined angle range, so that the scanning light can be incident on the scanning surface 310 in a corresponding emission direction.

The controller outputs the first emission direction or the second emission direction to the first control component 214 according to the first region and the second region with different curvature degrees on the scanning surface 310, and the first control component 214 adjusts the orientation of the light emitting region 215 in the light source body 213 , so that the orientation of the light-emitting area 215 is the first emission direction or the second emission direction output by the controller. When scanning the non-curved area, the controller outputs the first emission direction, and the first control component 214 controls the scanning light emitted by the light source body 213 to irradiate the first area of the scanning surface 310 according to the first emission direction, and controls the light source body 213 Sending scanning light to the first emission direction, the light source body 213 can be adjusted so that the scanning light emitted by the light source body 213 forms a second angle with the carrier 201 for carrying the object 300 to be scanned, and the scanning light is incident in the first emission direction To the scanning surface 310 , the angle between the scanning light and the scanning surface 310 is always the first angle. When scanning the curved area, the controller outputs a second emission direction, and the first control component 214 controls the scanning light emitted by the light source body 213 to irradiate the curved area of the scanning surface 310 according to the second emission direction, and controls the light source body 213 to emit light to the second emission direction. The light source body 213 can be adjusted so that the light source body 213 emits a scanning light and the carrier 201 forms a third included angle, wherein the second included angle is different from the third included angle. The emission direction is incident on the scanning surface 310 , and the angle between the scanning light and the scanning surface 310 is always the first angle.

In one of the possible implementations, the light source 212 may also include a light deflection component (not shown in the figure), and the adjustment of the emission direction of the emitted scanning light may also be performed by the light deflection component, which is used to deflect the light emitted by the light source 212. The scanning light is used to make the scanning light emitted by the light source 212 incident on the scanning surface 310 of the object to be scanned 300 in a certain direction.

The light deflection component can deflect and scan the scanning light emitted by the light source 212 to a predetermined angle range, that is, the scanning light emitted by the light source 212 is reflected to the light deflection component, and the controller outputs the first emission direction or the second emission direction to the light The deflection component, or the controller outputs the first emission direction or the second emission direction to the first control component 214, and the first control component 214 controls the light deflection component according to the first emission direction or the second emission direction, and the light deflection component The scanning light is deflected according to the first emitting direction or the second emitting direction, so that the scanning light deflected by the light deflection component enters the scanning surface 310 in the corresponding first emitting direction or the second emitting direction, thereby adjusting the scanning light and the scanning surface. For the incident angle of 310, the scanning light is deflected by the light deflection component, so that the first included angle between the scanning light and the scanning surface 310 remains constant. For example, when scanning the first area, the light deflection component receives the first emission direction, then the light deflection component deflects the scanning light according to the first emission direction, so that the deflected scanning light forms a second angle with the carrier 201, and the scanning light Incident to the scanning surface 310 in the first emission direction, the angle between the scanning light and the scanning surface 310 is always the first angle. Scanning the second area, the light deflection component receives the second emission direction, then the light deflection component deflects the scanning light according to the second emission direction, so that the deflected scanning light forms a third angle with the carrier 201, and the scanning light follows the second emission direction The two emission directions are incident on the scanning surface 310 , and the angle between the scanning light and the scanning surface 310 is always the first angle.

Then the controller can control the light source 212 to emit scanning light toward the first predetermined direction, so that after the emitted scanning light is deflected by the light deflection component, the propagation direction of the deflected scanning light to the scanning surface 310 is the first emitting direction . Correspondingly, the controller can control the light source 212 to emit the scanning light toward the second predetermined direction according to the second emission direction, so that after the scanning light is deflected by the light deflection component, the deflected scanning light travels toward the scanning surface 310 in the propagation direction is the second emission direction. The first predetermined direction and the second predetermined direction can be deduced according to the principle of reflection and the first emission direction and the second emission direction.

Wherein, the surface of the first reflector 222 has a reflective surface 225, and the reflective surface 225 reflects the scanning light reflected by the scanning surface 310. In the scanning light reflected by the scanning surface 310, the light and shadow changes according to the presence and Otherwise, the scanning light reflected from the scanning surface 310 (which is the image information on the scanning surface 310 ) is reflected to the photoelectric conversion element 232 through the reflecting surface 225 . The first reflector 222 may be a mirror, such as a prism.

In the embodiment of the present application, the first reflector 222 can reciprocate in the initial scanning direction J, that is, in addition to reciprocating the first reflector 222 along the scanning direction according to the light source 212, the first reflector 222 can also Make the following adjustments:

The moving direction of the first reflector 222 can be adjusted, and the moving direction of the first reflector 222 is the scanning direction of the scanning device 200 . The moving direction of the first reflector 222 is consistent with the moving direction of the light source 212 , and when the moving direction of the light source 212 is adjusted, the moving direction of the first reflector 222 is correspondingly adjusted. Adjusting the moving direction of the first reflector 222 ensures that the first reflector 222 can better receive the scanning light reflected from the scanning surface 310 .

The orientation of the first reflector 222 can be adjusted. For example, the first reflector 222 can be rotated to adjust the direction in which the scanning light is reflected by the reflective surface 225 of the first reflector 222, and the direction of the scanning light after being reflected by the scanning surface 310 can be changed. The reflection direction is such that the first reflector 222 can receive the scanning light to the greatest extent, and can smoothly reflect the received scanning light to the photoelectric conversion element 232 .

_The moving rate of the first reflector 222 can be adjusted, that is, the first reflector 222 does not move at _a constant rate during the scanning process. A ₅₁ A ₅₂ ) or a rectangular frame (A ₃ A ₄ A ₆₁ A ₆₂ )) and a curved area (such as the rectangular frame (A ₅₁ A ₅₂ A ₆₁ A ₆₂ ) in Figure 3) have different moving speeds. The moving speed of the first reflector 222 is consistent with or close to the moving speed of the light source 212 . When the moving speed of the light source 212 is adjusted, the moving speed of the first reflector 222 is correspondingly adjusted.

In one possible implementation manner, as shown in FIG. 3 , the first reflector 222 may include a first reflector body 223 and a second control component 224 for controlling the first reflector body 223 , wherein the second The control component 224 can control the first reflector body 223 according to the signal output by the controller. That is, the second control component 224 can control the first reflector body 223 to adjust the above-mentioned moving direction, reflecting direction or moving speed.

In one of the possible implementations, the second control component 224 can also be used to drive the first reflector body 223, then the controller outputs the movement rate to the second control component 224, and the second control component 224 drives according to the movement rate The first reflector body 223 advances.

In the embodiment of the present application, the driving assembly can simultaneously drive the light source body 213 and the first reflector body 223 to move toward the object 300 to be scanned along the scanning direction, and can simultaneously drive the light source body 213 and the first reflector body 223 at the same moving speed. The first reflector body 223 . The drive assembly may include a motor or belt, and may further include a drive controller that controls the motor or belt. Wherein, the driving assembly is basically the same as the assembly for driving the light source body 213 and the first reflector body 223 of the conventional scanning device 200 , therefore, its detailed description is omitted.

In one possible implementation manner, the scanning component 202 further includes a second reflector 242 , and the position of the second reflector 242 is fixed, that is, the second reflector 242 does not move along with the light source 212 . The second reflector 242 can serve as a light relay to reflect the scanning light reflected by the first reflector 222 to the photoelectric conversion element 232 . The second reflector 242 may be a mirror, such as a prism. Then the first reflector 222 may be a moving prism, and the second reflector 242 may be a fixed prism.

Wherein, the photoelectric conversion element 232 is used to receive the light reflected by the scanning component 202, such as light reflected by a prism, and convert the received light image into an electrical signal to output image data. The photoelectric conversion element 232 may be a photoelectric sensor, which is a device that converts optical signals into electrical signals. Its working principle is based on the photoelectric effect. The photoelectric effect refers to that when light is irradiated on certain substances, the electrons of the substance absorb the energy of photons and a corresponding electric effect occurs. According to the different phenomena of photoelectric effect, photoelectric effect can be divided into three categories: external photoelectric effect, internal photoelectric effect and photovoltaic effect. Photoelectric devices include phototubes, photomultiplier tubes, photoresistors, photodiodes, phototransistors, and photocells.

In one possible implementation manner, the optical scanning device 200 may further include a signal processing component (not shown in the figure), and the signal processing component processes the image data output by the photoelectric conversion element 232 to output an image signal. The signal processing component may include a driving circuit and a signal processor. Under the action of the driving circuit, the photoelectric conversion element 232 converts light into a digital signal, and the digital signal is processed by the signal processor to obtain an image signal.

The working process of the scanning device 200 in the embodiment of the present application will be specifically described below in conjunction with a conventional scanning device:

When the conventional image scanning device 100 scans, whether it is scanning the first area or scanning the second area, it controls the fluorescent lamp 2 and the prism 3 to work with conventional control parameters, such as controlling the fluorescent lamp 2 and the prism 3 to move at a constant speed Move, control the fluorescent lamp 2 and the prism 3 to move in a constant scanning direction, control the fluorescent lamp 2 to emit scanning light in a constant emission direction, and the prism 3 receives the scanning light reflected from the scanning surface 310 in a constant attitude.

When scanning to the non-curved area of the scanning surface 310, the scanning device 200 provided by the embodiment of the present application works in the same way as a conventional scanning device, and the controller controls the light source 212 and the first reflector 222 to move at a constant rate (such as the second a moving speed) to move, control the light source 212 to emit scanning light with a constant emission direction (such as the first emission direction), and the scanning surface 310 reflects the scanning light to the first reflector 222, and the first reflector 222 emits the scanning light at a constant The posture receives the scanning light reflected by the scanning surface 310, the first reflector 222 receives the scanning light carrying the information of the scanning surface 310, and then the first reflector 222 reflects the received scanning light in a constant reflection direction to the photoelectric conversion Element 232.

When scanning to the curved area of the scanning surface 310, the conventional image scanning device 100 still controls the work of the fluorescent lamp 2 and the prism 3 with the above-mentioned conventional control parameters. is unchanged, and the scanning of the corresponding scanning components (fluorescent lamp 2 and prism 3) is also unchanged. The scanning light is then reflected on the scanning surface 310 instead of the glass stage. Scanning the non-curved area and the curved area of the scanning surface 310 with the scanning light in the same emission direction, the incident angles of the scanning light in the non-curved area and the curved area are different, that is, the scanning light scanning the non-curved area of the scanning surface 310 and the The included angle of the non-curved area is different from the included angle between the scanning light scanning the curved area of the scanning surface and the curved area. Correspondingly, the scanning light carried by the scanning light on the non-curved area and the scanning light on the curved area The amount of information on the plane 310 is different. Based on the different incident angles of the scanning light in the non-curved area and in the curved area, the angle of the reflected scanning light also changes, that is, the angle of the scanning light reflected in the curved area is relative to the angle of the scanning light reflected in the non-curved area Something has changed. For a position with a relatively large degree of curvature, the deviation of the reflected scanning light emission angle will be greater, and the text content on the obtained scanning light information will be deformed. And if the prism 3 is not adjusted, the prism 3 may not be able to receive the scanning light reflected from the scanning surface 310 . If the scanning light cannot be transmitted to the prism 3, it will directly result in no scanning information input into the photoelectric conversion element 4 in the position area, and it will be assumed that there is no information by default, so the bending groove part is black.

The moving speed of the scanning component of the conventional scanning device is constant, but the speed of the fluorescent lamp 2 and the prism 3 passing through the curved area of the scanning surface 310 will change, resulting in omission of information acquired by the scanning light, causing stretching deformation of the scanning image. When the fluorescent lamp 2 and the prism 3 pass through the scanning surface 310 at the same moving speed, that is, the fluorescent lamp 2 and the prism 3 keep a constant moving speed while scanning the scanning surface 310, the scanning speed of the curved area and the non-bending area on the scanning surface 310 is different. the same. Correspondingly, the scanning speeds of the curved regions with different degrees of curvature are different. The fluorescent lamp 2 and the prism 3 go through the same displacement at the same moving speed in the same time, but the area of the fluorescent lamp 2 and the prism 3 passing through the curved area on the scanning surface is larger than the area of the non-bending area, or in other words, when the fluorescent lamp 2 and the prism 3 undergo the same displacement , the expanded area or length of the curved region on the scanning surface 310 is larger than the area or length of the non-curved region.

Exemplarily, the curved area is a semicircle with a radius of 5 cm. The fluorescent lamp 2 and the prism 3 undergo a 10 cm displacement in the same time. The arc is expanded, and the arc is the side length of the scanning surface 310. The distance between the fluorescent lamp 2 and the scanning surface of the prism 3 passing through the curved area is 5πcm, and 5πcm is greater than 10cm. The longer the distance passed in the same time, the correspondingly the speed of receiving and scanning in this area becomes faster, that is, if the scanning surface 310 passes through the scanning surface 310 at a constant moving speed, the fluorescent lamp 2 and the prism 3 pass through the same displacement at the same moving speed at the same time, but The area of the fluorescent lamp 2 and the prism 3 passing through the curved area on the scanning surface is larger than the area of the non-bending area, or when the fluorescent lamp 2 and the prism 3 undergo the same displacement, the area or length of the curved area on the scanning surface is larger than the area of the non-bending area or long. Then, in the same time period, the area that the scanning light can fully scan the non-curved area is smaller than the area of the curved area, and correspondingly, the content that can be fully scanned on the scanning surface becomes less. The information obtained by the scanning light is missing, and the scanning image is not clear.

However, when the scanning device 200 in the embodiment of the present application scans the curved area of the scanning surface 310 , the scanning device 200 recognizes that the currently scanned area is in a curved state, and acquires the curved state of the area, that is, the curved shape. The controller calculates corresponding scanning parameters according to the curved shape, and the controller outputs the corresponding scanning parameters to the scanning component 202, and the scanning component 202 works according to the corresponding scanning parameters.

The controller calculates the corresponding second moving rate according to the curved shape, and the second moving rate when passing through the curved area of the scanning surface 310 is smaller than the first moving rate when passing through the non-curved area of the scanning surface 310, and if the curved The more curved the area, the smaller the value of the corresponding second movement speed. Therefore, the controller controls the scanning component 202 to scan the scanning surface 310 at a constant first moving speed in the non-curved region, and controls the scanning component 202 to scan the scanning surface 310 at the second moving speed in the curved region. If the bending states of the bending regions are different, the scanning component 202 is controlled to scan the scanning surface 310 at a second moving rate of a different value. By controlling the moving speed of the scanning component passing through different regions, it is ensured that the distance of the scanning component 202 passing through the curved region on the scanning surface 310 is the same as or close to that of the non-curved region within the same time period, that is, the distance when the curved region is unfolded into a non-curved shape The same or close to the path of the non-curved region. In this way, it can be ensured that the scanning component 202 scans the scanning surface 310 sufficiently and uniformly, that is, the scanning light is fully and uniformly irradiated to the scanning surface 310 to ensure clear scanning images. Adjusting the moving rate in real time according to the shape of the scanning surface 310 can ensure that the scanning light fully scans the information of the curved area of the scanning surface 310, and reduces the deformation of scanning imaging in the curved area of the scanning surface 310.

The controller should keep the first included angle between the scanning light and the scanning surface 310 constant, and calculate the emission direction of the scanning light according to the bending state. The first emission direction when scanning the non-curved area is different from the second emission direction when scanning the curved area, and the corresponding direction values of the second emission direction of the curved areas with different curved shapes, ie different degrees of curvature, are also different. When scanning the non-curved area, the controller controls the light source 212 so that the direction in which the scanning light emits to the scanning surface is constant as the first emission direction, ensuring that the angle between the scanning light and the non-curved area is the first angle, and the scanning light and the non-curved area are at the first angle. The carrier for carrying the object to be scanned forms a second included angle. Based on the fact that the non-bending region is not curved relative to the plane of the carrier, and the non-bending region is parallel to the carrier, the first included angle is equal to the second included angle. When scanning the curved area, the controller controls the light source 212 so that the direction in which the scanning light is emitted to the scanning surface is the second emission direction, ensuring that the angle between the scanning light and the curved area is also constant at the first angle, then the scanning light and the curved area are also constant at the first angle. The carrier for carrying the object to be scanned forms a third included angle. The first emission direction is different from the second emission direction, and the third included angle is different from the second included angle. In this way, the angle between the scanning light and the curved area on the scanning surface 310 is the first angle, the angle between the scanning light and the non-curved area on the scanning surface 310 is also the first angle, and the photosensitive direction on the scanning surface 310 is consistent or Proximity, to realize that the scanning of the curved area is consistent or close to the scanning of the non-curved area, so that the photosensitive intensity of each area on the scanning surface is consistent and uniform, so that no black area appears in the scanning result. To avoid the loss or error of information carried by the scanning light reflected from the scanning surface 310, by adjusting the incident direction of the scanning light, the curved surface is scanned as a plane to reduce the deformation of the text content caused by the different angles of the incident scanning light in the curved area.

Based on the adjustment of the emission direction of the scanning light, the controller adjusts the reflection direction of the scanning light reflected from the scanning surface 310 by the first reflector 222 according to the principle of reflection, so as to ensure that the scanning light reflected from the curved area of the scanning surface 310 can be smoothly transmitted to The second reflector 242 is guided to the photoelectric conversion element 232 through the second reflector 242 . Information loss is reduced, and blackening of the curved area of the scanning surface 310 is reduced.

In the embodiment of the present application, when the placement position of the object to be scanned 300 is tilted at a certain angle from the conventionally indicated placement position, that is, when the scanning plane 310 has a certain angle with the preset horizontal reference, the scanning plane 310 exists. For the placement angle, if the light source 212 is not adjusted, the direction of the text on the object 300 to be scanned is inclined at a certain angle to the direction in which the light source 212 is about to advance. When the placement angle of the scanning surface 310 is larger than the preset angle, the controller adjusts the placement angle of the light source 212 so that the moving direction of the scanning light is consistent with or close to the direction of the text. If the light source body 213 is perpendicular to the scanning direction as a whole before adjustment, or the light source body 213 is parallel to the vertical direction of the carrier 201, that is, the light source body 213 is parallel to the vertical frame of the carrier 201, the light source body 213 is along the direction of the initial scanning direction J. Horizontal scanning of the carrier. However, based on the fact that the position of the object to be scanned 300 is tilted at a certain angle, and the position of the scanning surface 310 is greater than the preset angle, the controller will adjust the light source 212 and translate the light source body 213 along the direction C, so that the light source body 213 is in the same direction as the object to be scanned. The frame of the scanned object 300 is parallel.

Exemplarily, if the placement angle of the scanning surface 310 is 35 degrees, then adjust the placement angle of the light source body 213 to 35 degrees, so that the angle between the light source body 213 and its unadjusted position is 35 degrees, ensuring that the moving direction of the scanning light is consistent with Text direction remains the same or close.

The controller can also adjust the position of the light source 212 according to the space limitation of the scanning device 200 during the scanning process. Based on the above-mentioned adjustment of the placement angle of the light source body 213 , the light source body 213 may exceed its allowed range of motion during the scanning process. Therefore, it is necessary to adjust the position of the light source body 213 in real time. If the position of the light source body 213 is adjusted up and down along the direction A, it is ensured that mechanical collision will not be found.

In the embodiment of the present application, according to the placement position of the scanning surface 310 , the scanning start point and the scanning end point of the light source 212 are adjusted. According to the placement angle of the scanning surface 310, the placement angle of the light source 212 is adjusted to ensure that the moving direction of the scanning light is consistent with or close to the direction of the text. During the scanning process, according to the space limitation of the scanning device 200, the position of the light source 212 is adjusted to ensure that no mechanical collision is found. During the scanning process, the moving speed is adjusted in real time according to the shape of the scanning surface 310 to ensure that the speed of the scanning light passing through the curved area of the scanning surface 310 of the object 300 to be scanned is consistent or close to that of the straight area, ensuring that the scanning light passes through the scanning of the object 300 to be scanned The velocities of the curved regions of the face 310 with different degrees of curvature remain the same or close. The information of the curved area of the scanning surface 310 is fully scanned, and the deformation of the scanning image in the curved area of the scanning surface 310 is reduced. Also adjust the light source 212 according to the curved state of the scanning surface 310, and adjust the emission direction of the scanning light so that the first angle between the scanning light and the scanning surface 310 remains constant, that is, the angle between the scanning light and the curved area of the scanning surface is the same as the scanning light and the scanning surface. The included angles of the curved regions of the scanning surface 310 are the same. Adjust the first reflector according to the placement state of the scanning surface 310, and adjust the angle at which the first reflector receives the scanning surface 310 to reflect the scanning light, so that the first reflector can receive the scanning surface 310 and reflect the scanning light, and the scanning light can be reflected to The photoelectric conversion element 232 reduces information loss and reduces the blackening of the curved area of the scanning surface 310 .

It can be understood that the above description of the scanning device 200 is only an exemplary description, and the embodiment of the present application does not specifically limit the location and connection relationship of the specific hardware structure of the scanning device 200 .

When the scanning device 200 is implemented as a hardware device, referring to FIG. 4 , the scanning device 200 may include a memory 101 and one or more processors 102 .

Wherein, the memory 101 is used for storing program instructions. The memory 101 stores the executable instruction computer program of the scanning method provided by the embodiment of the present application, and the memory 101 can include at least one type of storage medium, and the storage medium includes a flash memory, a hard disk, a multimedia card, a card-type memory (for example, SD or DX memory etc.), Random Access Memory (RAM), Static Random Access Memory (SRAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Programmable Read Only Memory (PROM), Magnetic Memory , Disk, CD, etc. Also, the scanning apparatus 200 may cooperate with a network storage that performs a storage function of the storage through a network connection. The storage 101 may be an internal storage unit of the scanning device 200 , such as a hard disk or a memory of the scanning device 200 . The memory 101 can also be an external storage device of the scanning device 200, such as a plug-in hard disk equipped on the scanning device 200, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash memory card (Flash Card) and so on. Further, the memory 101 may also include both an internal storage unit of the scanning device 200 and an external storage device. The memory 101 is used to store computer programs and other programs and data required by the device. The memory can also be used to temporarily store data that has been output or will be output.

One or more processors 102 call the program instructions stored in the memory 101. When the program instructions are executed, the one or more processors 102 are individually or jointly configured to implement the following operations: determine the object to be scanned Scanning the surface, acquiring a curved shape of the scanning surface, and controlling scanning of the scanning surface according to the curved shape, so as to obtain an image of the scanning surface. The processor 102 of the embodiment of the present application may implement the scanning method provided in the embodiment of the present application, and the scanning device 200 of the present embodiment may be described with reference to the scanning method of the embodiment of the present application below.

In one of the possible implementations, the scanning device 200 can be integrated into a scanner, copier, or fax machine, or provide a multi-functional digital compound that integrates multiple functions such as printing, copying, scanning, and faxing. All-in-one (Multi Function Peripheral, MFP) and other image forming devices.

In one of the possible implementations, the scanning device 200 can be a scanner, a copier, a fax machine, or a multi-function digital composite that provides a scanner, a copier, a fax machine or a combination of printing, copying, scanning, faxing and other functions. Multi Function Peripheral (MFP) and other image forming devices, wherein the copier can be a digital copier, an electrostatic copier, a laser printing device, and the like.

The scanning device 200 provided in the embodiment of the present application can be applied to scenarios such as scanning, printing, and copying, which are not specifically limited in the embodiment of the present application.

Next, the scanning method in the embodiment of the present application will be introduced.

In the embodiment of the present application, a flow chart is used to illustrate the operations performed by the device according to the embodiment of the present application. It should be understood that the preceding or following operations are not necessarily performed in an exact order. Instead, various steps may be processed in reverse order or concurrently, as desired. At the same time, other operations can be added to these procedures, or a certain step or steps can be removed from these procedures.

Please refer to FIG. 5 . FIG. 5 is a schematic flowchart of a scanning method provided in an embodiment of the present application. The scanning method can be executed by the controller in the aforementioned scanning device 200, and the method can include the following steps:

Step S502: Determine the scanning surface of the object to be scanned.

Wherein, the object to be scanned may be an object to be scanned and imaged by a user using a scanning device. The object to be scanned may be recording media such as books, magazines, and paper, and the object to be scanned may also be other objects that can be scanned by the scanning device, which is not specifically limited in this embodiment of the present application. Wherein, the scanning surface is the surface on the object to be scanned for receiving scanning, which may be the surface on the object to be scanned that receives the scanning light for scanning.

In this embodiment of the present application, the scanning surface of the object to be scanned is determined, that is, the surface on the object to be scanned that receives scanning is determined. The scanning surface of the object to be scanned can be determined according to the placement of the object to be scanned on the carrier. Exemplarily, if the object to be scanned is a book, the user opens the book to the page to be scanned, such as page 2 to page 3, and displays the pages of page 2 to page 3 of the book on the carrier, so that The scanning component can scan the pages of the 2nd page to the 3rd page, then the scanning surface may include the pages of the 2nd page and the 3rd page. In other cases, the scanning surface may also include edge areas of other pages.

In one of the possible implementations, the object to be scanned is pre-scanned, and the area of the object to be scanned in the obtained pre-scanned image is the scanning surface area, which corresponds to the area where the scanning surface of the object to be scanned is located, so that it can be determined The scanning surface of the object to be scanned. Specifically, the scanning device pre-scans the object to be scanned on the carrier to obtain a pre-scanned image, and performs image processing on the pre-scanned image to identify the object to be scanned in the pre-scanned image, and determines that the object to be scanned is located in the pre-scanned image. The area occupied by the pre-scanned image is the area occupied by the scanned surface in the pre-scanned image. The area of the scanning surface in the pre-scanning image may represent the scanning surface on the carrier, and the scanning surface on the carrier may be determined according to the area occupied by the scanning surface in the pre-scanning image. The scanning surface of the object to be scanned may also be determined in other ways, which is not specifically limited in this embodiment of the present application.

Please refer to FIG. 6 , the unfolded book is placed on the carrier 201, the position area ABCD in the pre-scanned image is the area of the object to be scanned, and the position area ABCD is the area of the scanning surface 310, which is received by the scanning surface 310 of the object 300 to be scanned. In the area where the image formed after scanning is located, the surface of the object to be scanned corresponding to the ABCD area is the scanning surface 310 , and the scanning surface 310 includes

pages

61 , 62 and edges 63 of other pages.

In the embodiment of the present application, the area with a curved shape on the scanning surface is a curved area (ie, a curved surface), and the area with a non-curved shape on the scanning surface is a non-curved area (ie, a plane). The scanning surface may include curved regions and non-curved regions, or the entire scanning surface may be a curved region. Correspondingly, if the entire line connecting any two points on the scanning surface falls on this surface, then the scanning surface is a plane. If the line connecting any two points on the scanning surface cannot completely fall on the surface, the scanning surface can be regarded as a trajectory formed by a moving line (straight line or curve) moving continuously in space, then the scanning surface is a curved surface.

It can be understood that for the same scanning surface, the scanning surface may be divided into multiple sub-scanning surfaces, some of which are non-curved, and some of which are curved. That is, the plurality of sub-scanning surfaces include curved regions and non-curved regions.

Step S504: Control the scanning of the scanning surface according to the arrangement state of the scanning surface, so as to obtain an image of the scanning surface. That is, according to the arrangement state of the scanning surface, the scanning strategy associated with the arrangement state is used to scan the contents of the scanning surface to obtain a scanned image. Wherein, the arrangement state of the scanning surface may include the arrangement position of the scanning surface, the arrangement angle of the scanning surface and the shape of the scanning surface. The scanning strategy includes the moving speed of the scanning component, the orientation of the scanning component, the scanning direction of the scanning component, and the moving path of the scanning component. Wherein, the orientation of the scanning component includes the direction in which the light source emits scanning light, and/or, the orientation of the first reflector.

In one of the possible implementations, when the placement state of the scanning surface is the placement position of the scanning surface, the scanning of the scanning surface is controlled according to the placement position of the scanning surface. For example, the scanning of the scanning surface can be planned according to the placement position of the scanning surface. The scanning path of the scanning surface, the scanning path includes the scanning start point and the scanning end point, that is, the position where the scan starts and the end scan is controlled. Or control the scanning component to scan the scanning surface from the scanning starting point until reaching the scanning end point.

In the embodiment of the present application, scanning positioning can be performed according to the placement position of the scanning surface, and the scanning starting point and scanning end point of the scanning can be calculated. According to the position area of the scanning surface in the scanning device, the starting position and the ending position of the area occupied by the scanning surface in the scanning device are calculated, and the scanning starting point of the scanning can be obtained according to the starting position of the scanning surface in the scanning device. The end position of the surface in the scanning device can be used to obtain the scanning end point of the scan, and the middle position of the scanning surface can also be obtained to complete the scanning positioning.

In one of the possible implementations, when the placement state of the scanning surface is the placement angle of the scanning surface, the scanning of the scanning surface is controlled according to the placement angle of the scanning surface. For example, the scanning of the scanning surface can be controlled according to the placement angle of the scanning surface. The scan direction in which the scan surface is scanned. The scanning direction can be adjusted according to the placement angle of the scanning surface, so that when the scanning surface is scanned according to the scanning direction, the scanning direction can be guaranteed to scan along the scanning surface. When the scanning direction adjusted according to the placement angle of the scanning surface is consistent with or close to the direction of the text on the scanning surface, the text on the scanning surface can be scanned more fully.

In one possible implementation manner, the scanning direction can be obtained according to the text direction on the scanning surface, and the text direction on the scanning surface can be set as the scanning direction, so that the text on the scanning surface can be scanned more fully. It can be understood that when the text direction on the scanning surface is parallel to the horizontal frame of the scanning surface on the object to be scanned, the scanning direction obtained according to the placement angle of the scanning surface is consistent with or close to the scanning direction obtained according to the text direction on the scanning surface. Set the direction of the text on the scanning surface as the scanning direction, so as to ensure that the subsequent scanning light is irradiated to each position on the scanning surface at the same angle, so that the photosensitive intensity of each area on the scanning surface is consistent or close, so that the rate at which each area on the scanning surface receives scanning Consistent or close to avoid black areas in the scanned results, reduce the stretching deformation of the scanned image, improve the quality of the scanned image, and scan the text on the scanning surface more fully.

In one of the possible implementations, when the text direction is parallel to the horizontal direction of the scanning surface or the text direction is parallel to the vertical direction of the scanning surface, that is, the layout of the text direction on the scanning surface is the normal reading direction, which can be based on the scanning surface. The text direction and the preset horizontal datum get the tilt angle of the scanning surface. That is, when there is an inclination angle between the text direction and the preset horizontal reference, correspondingly, there is an inclination angle in the scanning surface. Wherein, the text direction is the sorting direction of the text on the scanning surface.

In one of the possible implementations, if the text direction is not parallel to the horizontal direction of the scanning surface or the text direction is not parallel to the vertical direction of the scanning surface, that is, when the layout of the text on the scanning surface is an unconventional reading direction, the Text Orientation is set to Scan Orientation.

In the embodiment of the present application, adjusting the scanning direction according to the placement angle of the scanning surface includes setting the moving direction of the scanning component (light source and first reflector) according to the placement angle of the scanning surface, and may also include setting the moving direction according to the placement angle of the scanning surface. Adjust the placement angle of the light source.

Wherein, the moving direction of the scanning component (light source and first reflector) is set according to the placement angle of the scanning surface, such as the angle between the horizontal border of the scanning surface and a preset horizontal reference is the placement angle, and the horizontal reference is the carrier The horizontal frame of the horizontal frame, then the angle between the horizontal frame of the scanning surface and the horizontal frame of the carrier is the placement angle, and the initial scanning direction J is adjusted according to the placement angle, that is, the initial scanning direction J is adjusted to the placement angle, so that after adjustment The scanning direction is parallel to the horizontal border of the scanning surface, and the moving direction of the scanning component is the adjusted scanning direction.

Wherein, the placement angle of the light source is adjusted according to the placement angle of the scanning surface. For example, the angle between the horizontal border of the scanning surface and a preset horizontal reference is the placement angle, and the horizontal reference is the horizontal border of the carrier, so the scanning surface The included angle between the horizontal frame and the horizontal frame of the carrier is the placement angle, and the placement angle of the light source is adjusted according to the placement angle, that is, the included angle between the adjusted light source and the unadjusted light source is the placement angle, so that the adjusted light source is perpendicular to the horizontal frame of the scanning surface.

In one of the possible implementations, when the arrangement state of the scanning surface is the curved state of the scanning surface, the scanning of the scanning surface is controlled according to the curved state of the scanning surface, including the above-mentioned movement rate, the emission direction of the scanning light and The setting of scanning parameters such as the reflection direction of the scanning light, or control the scanning component to scan according to one or more of the scanning parameters of the moving rate, the emission direction of the scanning light and the reflection direction of the scanning light.

Wherein, the curved state of the scanning surface is the degree of curvature of the scanning surface, and the degree of curvature of the scanning surface can be obtained from the shape of the scanning surface. The shape of the scan surface includes a non-curved shape and/or a curved shape. The curved shape of the scanning surface may include a convex shape of the scanning surface and a concave shape of the scanning surface. According to the arrangement state of the scanning surface, it can be determined whether the scanning surface is a plane or a curved surface. If the arrangement state of the scanning surface is in a non-curved shape, the scanning surface is a plane. If the scanning surface is placed in a curved shape, the scanning surface is a curved surface. Wherein, the curvature of the scanning surface may mean that the scanning surface is curved relative to a plane (such as a horizontal plane), and the curvature of the scanning surface may also be that the scanning surface is curved relative to the plane where the carrier for carrying the object to be scanned is located. The curved shape of the scanning surface may be the curved shape of the scanning surface relative to the plane, and the curved shape of the scanning surface may also be the curved shape of the scanning surface relative to the plane where the carrier is located. The degree of curvature of the scanning surface relative to the horizontal plane or relative to the plane on which the carrier is located can be determined from the curved shape of the scanning surface. The scanning surface includes a curved area and a non-curved area, and the curved shape of the scanning surface includes the curved shape of the scanning surface relative to the plane, and may also include the non-curved shape of the scanning surface relative to the plane. In the embodiment of the present application, the curved shape of the scanning surface means that at least a part of the scanning surface presents a curved shape on the scanning surface.

In the embodiment of the present application, the curved shape of the scanning surface can be expressed by the degree of unevenness of the scanning surface or the flatness of the scanning surface, for example, parameters that can express the degree of curvature of the scanning surface can be obtained to express the curved shape of the scanning surface. The parameter may be curvature, curvature or slope, which is not specifically limited in this embodiment of the present application.

In one possible implementation manner, the curvature of the scanning surface is used to represent the curved shape of the scanning surface. If the curvature of the scanning surface is zero, the scanning surface is a plane, and the curved shape of the scanning surface is non-curved. If the curvature on the scan surface is non-zero, the scan surface is a curved surface, and the curved shape of the scan surface is curved.

In one of the possible implementations, a line is taken on the scanning surface, and the extending direction of the line is parallel to the scanning direction, or the extending direction of the line is parallel to the text direction, and the scanning surface is represented by the slope of a line on the scanning surface curved shape. Wherein, the text direction is the text sorting direction, such as the sorting direction of each character on the object to be scanned. Establish a Cartesian coordinate system based on the scanning direction, and calculate the slope of the line in the Cartesian coordinate system. If the slope of the line is always 0 and the line is a straight line, the curved shape of the scanning surface is not curved, that is, straight. If the slope of the line is not constant to 0, the line is a curve, and the curved shape of the scanning surface is curved.

It can be understood that the curved shape of the scanning surface includes that the scanning surface is curved and/or not curved. Each scanning surface has its corresponding curved shape. For a book, when it is opened to different pages, the curved shape of the scanning surface corresponding to the object to be scanned is different. For example, when the book is opened from page 2 to page 3 The curved shape of the scanning surface corresponding to the page is different from the curved shape of the scanning surface corresponding to the 258th to 259th pages of the open book.

In the embodiment of the present application, the movement rate corresponding to the position area is calculated according to the curved shape of the scanning surface, so that the scanning speed of the entire scanning surface is consistent or close, so that the scanning light scanned on the scanning surface is projected onto the scanning surface The rate of scanning remains relatively stable, avoiding blurred or uneven scanning results due to the curved area on the scanning surface that makes the scanning light projected to the scanning surface too fast. Scanning imaging has a certain frame rate. If the scanning speed is too fast, the imaging will be blurred. The purpose of controlling the moving speed of the scanning component is to ensure that the scanning component scans the entire scanning surface fully and uniformly, that is, the scanning light is sufficient and Uniformly irradiates the entire scanning surface to ensure the clarity of the scanned image.

In one possible implementation manner, the moving rate when scanning the non-curved area may be set as the first moving rate. The curved shape of the curved area on the scanning surface is obtained, and then the second moving rate corresponding to the curved area is obtained according to the first moving rate and the curved shape. The first rate of movement is different from the second rate of movement, wherein the first rate of movement is greater than the second rate of movement. The calculated moving speed is used to ensure that the scanning speed received by the entire scanning surface is consistent or close, for example, the speed that the entire scanning surface receives light irradiation is consistent or close. For non-curved areas, the movement rate is always the first movement rate. For the curved area, the moving rate is the second moving rate, which is calculated according to the first moving rate and the curved shape of the non-bending area, that is, the second moving rate is related to the bending degree of the curved area, that is, different The value of the second movement rate is different for the non-curved area of the curved shape. If the curved region is more curved, its corresponding second moving rate value is smaller. Accordingly, the corresponding moving speeds when the scanning component scans regions with different shapes on the scanning surface are calculated.

In the embodiment of the present application, adjust the angle or direction of the scanning light irradiating the scanning surface, that is, ensure that the photosensitive angle of the curved area on the scanning surface is consistent or close to the photosensitive angle of the non-curved area on the scanning surface, and the scanning light is incident on the curved surface. The angle between the scanning light and the curved area is the same as the angle between the scanning light and the non-bending area when the scanning light is incident on the non-bending area, and the scanning light scans the entire scanning surface in the same angular direction. The information on the scanning surface obtained by the scanning light reflected by the curved surface is consistent or close to the information on the scanning surface obtained by the scanning light reflected by the plane, reducing the loss of scanning information on the curved surface, and the photosensitive intensity of each area on the scanning surface is consistent Uniform, so that there is no black area in the scanning result, reducing the stretching deformation of scanning imaging.

In the embodiment of the present application, the emission direction of the scanning light emitted by the light source can be controlled according to the shape of the scanning surface. The corresponding first emission direction and the second emission direction are calculated according to the constant included angle between the scanning light and the scanning surface and the curved shape of each region. The emission direction of the corresponding scanning light when scanning the non-curved area can be set as the first emission direction, so that the emitted scanning light forms a second angle with the carrier for carrying the object to be scanned. Obtain the curved shape of the curved area on the scanning surface, and then obtain the second emitting direction of the scanning light corresponding to the curved area according to the first emitting direction and the curved shape of the scanning surface, that is, calculate the emitting direction of the scanning light corresponding to the curved area as the first Two emission directions, so that the emitted scanning light forms a third angle with the carrier for carrying the object to be scanned. The first emission direction and the second emission direction need to ensure that when the scanning light emitted by the light source is incident on the scanning surface, the first angle between the scanning light and the scanning surface is constant, that is, the angle between the scanning light corresponding to the non-curved area and the scanning surface The angle is the first included angle, and the included angle between the corresponding scanning light and the scanning surface when the region is bent is also the first included angle.

It can be understood that the first emission direction is different from the second emission direction. For the non-curved area, the emission direction is always the first emission direction. For the non-bend area, the emission direction is the second emission direction. The second emission direction is based on the first emission direction. The emission direction and the curved shape of the non-curved region are calculated, that is, the values of the corresponding second emission direction are different for the non-curved regions with different curved shapes and different degrees of curvature. Correspondingly, the second included angle is different from the third included angle. For the non-curved area, the included angle between the scanning light and the carrier for carrying the object to be scanned is always the second included angle. For the curved area, the scanning The included angle between the light and the carrier for carrying the object to be scanned is a third included angle, and the third included angle is an angle obtained according to the second included angle and the curved shape of the scanning surface, that is, different curved shapes For the non-curved region, the value of the corresponding third included angle is different for different degrees of curvature.

In the embodiment of the present application, the posture of the first reflector can be calculated according to the shape of the scanning surface, based on ensuring that the scanning light reflected from the scanning surface can be received by the first reflector, and ensuring that the first reflector can The received scanning light is reflected to the photoelectric conversion element. When the non-curved area can be set, the reflective surface on the first reflector for reflecting the scanning light forms a fourth angle with the horizontal plane. Based on the fact that the first included angle between the scanning light and the scanning surface is constant, it is ensured that the reflection direction of the scanning light on the reflecting surface of the first reflector is parallel to the horizontal plane, and the fourth included angle can be obtained according to the first included angle. Obtain the curved shape of the curved area on the scanning surface, and then calculate the fifth included angle between the reflective surface and the horizontal plane, where the fifth included angle is an angle obtained from the first included angle and the curved shape of the scanning surface. The non-curved regions of different curved shapes have different degrees of curvature, and the values of the corresponding fifth included angles are different.

In the embodiment of the present application, the reflective surface of the first reflector is adjusted to adjust the angle at which the reflective surface receives the scanning light reflected from the scanning surface and the reflection direction of the scanning light reflected by the reflective surface, so that the scanning light reflected by the reflective surface The light enters the second reflector or the photoelectric conversion element in the direction of the maximum light intensity, so that the photoelectric conversion element experiences the maximum light intensity.

In the embodiment of the present application, obtaining the placement state of the scanning surface may include performing image processing on the pre-scanning image to obtain the placement state of the scanning surface after pre-scanning the scanning surface to obtain a pre-scan image.

The following is an introduction by processing the pre-scanned image to obtain the arrangement state of the scanned surface.

Please refer to Figure 7, take the upper left corner of the carrier as the origin O, take the long side L of the carrier as the horizontal axis, and take the wide side W of the carrier as the vertical axis to establish a rectangular coordinate system OLW, as shown in Figure 7, we can get Coordinates (x _i , y _i ) (i=1, 2, 3, 4) of the four points of the rectangular border A _i of the area of the scanning surface 310, that is, the area of the scanning surface A ₁ A ₂ A ₃ A ₄ , and page 61 and the dividing line A ₅ A ₆ between page 62 (that is, the middle position of the scanning surface). Thus, according to the position area occupied by the scanning surface area in the pre-scanned image, it corresponds to the position area occupied by the scanning surface on the carrier, and then the placement position of the scanning surface on the carrier can be determined. That is, the coordinates (x _i , y _i ) of the four points of the rectangular frame A _i in the rectangular coordinate system OLW (i=1, 2, 3, 4).

tilted handle

The placement angle of the object to be scanned on the carrier is relatively random. The horizontal border OL of the carrier is the preset horizontal reference. If the horizontal border of the scanning surface area of the object to be scanned, such as A ₁ A ₄ When the included angle of the horizontal border OL of is greater than a certain threshold angle, the object to be scanned is tilted. The object to be scanned has a certain placement angle, that is, the scanning surface 310 has a certain placement angle relative to a preset horizontal reference, and the placement angle is the scanning surface placement angle.

In order to ensure the scanning effect, the placement angle can be calculated and used to adjust the light source of the scanning device, so as to adjust the scanning direction of the light source and the attitude of the light source. The initial scanning direction J is along the direction of the horizontal border of the carrier, and the initial scanning direction J can be rotated according to the placement angle to obtain a new scanning direction, which is consistent with the vertical border OL or the scanning surface. Borders A ₁ A ₄ are parallel.

In one of the possible implementations, the vertical frame OW of the carrier can also be used as a preset horizontal reference, if the vertical frame of the scanning surface area of the object to be scanned, such as the vertical frame of A ₁ A ₂ and the carrier When the angle between the straight frame OW is greater than a certain threshold angle, the object to be scanned is tilted. The object to be scanned has a certain placement angle, that is, the scanning surface 310 has a certain placement angle relative to a preset horizontal reference, and the placement angle is the scanning surface placement angle. Then the initial scanning direction J is the direction of the vertical frame OW of the vertical carrier, and the initial scanning direction J can be rotated according to the placement angle to obtain a new scanning direction, which is consistent with the vertical frame OW or the scanning surface The bounding boxes of A ₁ and A ₂ are vertical.

Specifically, referring to FIG. 7, the processing flow for an inclined object to be scanned may include:

Calculate the placement angle

According to the confirmation of the scanning surface of the object to be scanned, the position area of the scanning surface area in the pre-scanning image can be obtained, as shown in Figure 7, in the Cartesian coordinate system OLW, the scanning surface area A ₁ A ₂ A ₃ A ₄ can be calculated The angle between the horizontal frame A ₁ A ₄ and the horizontal axis OL of the rectangular coordinate system OLW (that is, the horizontal frame of the carrier), so as to obtain the rectangular coordinate system OLW established with the carrier and the object to be scanned or the scanning surface 310 and The included angle in the horizontal direction is the placement angle of the scanning surface. The angle between the sideline A ₁ A ₄ of the scanning surface area A ₁ A ₂ A ₃ A ₄ and the horizontal axis OL of the rectangular coordinate system OLW is the placement angle of the scanning surface 310, and the line A ₁ A ₄ and the rectangular coordinate system The angle between the horizontal axis OL of OLW:

Wherein, (x ₁ , y ₁ ) is the coordinate value of A ₁ , and (x ₄ , y ₄ ) is the coordinate value of A ₄ .

In one of the possible implementations, for the placement angle θ of the scanning surface, that is, when there is a certain placement angle θ between the placement of the object to be scanned and the horizontal direction, the placement angle θ of the scanning surface can also be greater than the preset angle When planning the scanning path, including the moving path of the light source, to prevent the light source from exceeding the mechanical space range of the scanning device during the moving process and causing mechanical damage, it can be understood that the light source is set inside the scanning device, and if the light source moves beyond the carrier area, then The light source may trigger other elements of the scanning device as an example, that is, the range in which the light source is allowed to move corresponds to the carrier area.

Scan path planning

If the object to be scanned does not have a placement angle θ, that is, the edge A ₁ A ₄ of the object to be scanned A ₁ A ₂ A ₃ A ₄ is parallel to the horizontal coordinate OL of the carrier, scan according to the conventional scanning direction That is, for example, scanning horizontally in a horizontal direction.

In the embodiment of the present application, as shown in Figure 7, by performing object detection on the scanned object, the position in the middle of the scanning surface and the placement angle θ can be obtained, and the light source body is rotated according to the placement angle θ, so that the light source body and the object to be scanned The vertical edges A ₁ A ₂ of the object or scanning surface are parallel.

For example, referring to FIG. 8 , the area information of the carrier 201 is acquired, such as the carrier 201 is a quadrilateral B ₁ B ₂ B ₃ B ₄ , and the information of the light source 212 , such as the length H of the light source 212 . First, step ① is performed, moving the light source 212 to the middle position A ₅ A ₆ of the scanning area A ₁ A ₂ A ₃ A ₄ , and the light source 212 moves along the initial scanning direction J. Then perform step ②, adjust the scanning direction according to the placement angle of the scanning surface to obtain a new scanning direction K, and rotate the light source 212 to the placement angle θ of the scanning surface, so that the light source 212 and the edge of the scanning surface area (A ₁ A ₂ or A ₃ A ₄ ) parallel, or make the light source 212 perpendicular to the edge of the scanning area (A ₁ A ₄ or A ₂ A ₃ ). That is, the light source 212 is rotated to be perpendicular to the horizontal frame of the scanning surface, and the light source 212 moves along the new scanning direction K.

In one possible implementation manner, if the scanning direction is obtained according to the text direction, the light source 212 is rotated to be perpendicular to the text direction. Rotate the light source 212 along the text direction by the angle θ, or first move the light source 212 horizontally to a certain position, and then tilt the light source 212 to the angle θ of the scanning surface.

If the scan start point is the start position of the scan plane, the scan end point is the end position of the scan plane. Step ③ is executed to retract the light source 212 to the starting position A ₁ A ₂ of the scanning surface, that is, the starting point of scanning, so that the light source 212 is close to the starting position A ₁ A ₂ of the scanning surface. Finally, step ④ is executed to control the light source 212 to scan along the area A ₁ A ₂ A ₃ A ₄ of the scanning surface, that is, the light source 212 moves along the text direction or the development direction of the scanning surface, and moves the light source 212 to the end position A ₃ A of the scanning surface ₄ is the scanning end point.

Taking the range where the light source 212 is allowed to move as the range corresponding to the carrier B ₁ B ₂ B ₃ B ₄ , during the movement of the light source 212, according to the area information of the carrier 201, the placement angle of the light source 212 and the length of the light source 212 , calculate whether the top and bottom of the light source 212 will touch other elements of the scanning device, and adjust the position of the light source 212, such as the light source 212 can be placed along the upper and lower edges or borders of the carrier 201 (B ₁ B ₃ or B ₂ B ₄ ) Move the light source 212 in a direction to prevent the light source 212 from touching other components inside the scanning device 200 . That is, if the top of the light source 212 is about to exceed the position area corresponding to the upper edge B ₁ B ₃ of the carrier 201, then the light source 212 is moved toward the lower edge B ₂ B ₄ of the carrier 201, so as to avoid that the top of the light source 212 is about to exceed range of permitted activities. That is, if the bottom of the light source 212 is about to exceed the position area corresponding to the lower edge B ₂ B ₄ of the carrier 201, the light source 212 is moved toward the upper edge B ₁ B ₃ of the carrier 201 to avoid the bottom of the light source 212. About to exceed the range of permitted activities.

In the embodiment of the present application, reset is performed after scanning is completed. Exemplarily, referring to Fig. 9, the light source 212 is retracted along the scanning surface area, and step ① is first performed, the light source 212 is moved from the scanning end position to the position A ₅ A ₆ in the middle of the scanning surface, and the light source 212 can also be moved toward the scanning surface. After moving a certain position in the direction of A ₅ A ₆ in the middle of the surface, then perform step ② to rotate the light source 212 in the opposite direction by an angle θ, that is, to rotate the light source 212 in the opposite direction to the rotation direction in Figure 8 by an angle θ, so that the light source 212 212 is parallel to the edge B ₁ B ₂ of the carrier 201 , step ③ is finally retracted to the original position of the light source 212 along a straight path.

In the embodiment of the present application, the light source 212 is first moved to the middle of the scanning surface, so as to prevent the light source 212 from exceeding the allowed range of motion during the rotation process. It can be understood that the planning of the scanning path is not limited to the above manner, that is, the light source 212 is not limited to be moved to the middle position and then rotated, which is not specifically limited in the present application.

In the embodiment of the present application, the length, width and height information of the internal space of the scanning device can also be obtained first, and the range where the light source 212 is allowed to move is determined according to the length, width and height information, so that during the scanning process, according to the position information of the light source 212 and The range of its allowed activities is adjusted.

In the embodiment of the present application, the text box is parallel to the edge of the scanning surface, as shown in FIG. 6 , the text box is parallel to the upper and lower edges of the scanning surface, such as frame AC or frame BD. That is, for page 61, the top edge of page 61 is parallel to the lines of text. The placement angle θ is also the angle between the text box and the horizontal axis OL of the Cartesian coordinate system OLW. Then rotate the light source 212 along the text direction to the placement angle θ, then the light source 212 is perpendicular to the text direction, then the light source 212 moves to the scanning surface, and the scanning light emitted by the light source 212 is incident on the curved shape of each area on the scanning surface Consistent, as shown in Figure 7, after performing step ③, the light source 212 is parallel to the scanning surface A ₁ A ₂ , then the curved shape of the scanning surface on the scanning surface on which the light source 212 or scanning light passes is consistent, such as the light source 212 passing through the scanning surface Frame A 1 A 2 on the frame A ₁ A ₂ , then each point on the frame A ₁ A ₂ has the same degree of curvature along the curved shape along the scanning surface. The effect of subsequent scanning of the scanning surface according to the shape of the scanning surface can be further ensured.

In the following, the shape of the scanning surface is represented by the parameter slope for a specific description.

text detection

Perform text detection on the image including the scanned surface to obtain the text area and text orientation on the scanned surface. Wherein, the text area is the area where the text on the scanning surface is located. Wherein, the image including the scanned surface may be a scanned image, or may be a part of the scanned image including the area of the scanned surface. The acquisition of the image including the scanning surface may be obtained by scanning the object to be scanned in advance, or may be obtained in other ways, which is not specifically limited in this embodiment of the present application.

Specifically, an image including a scanned surface is input into a text detection model, the text detection model may be an OCR model, and the OCR model may perform text detection on the input image. The text detection model is specifically used to detect the position of the text in the image, and return the text box and the text direction of the area where the text is located (for example, the line where the text is located), wherein the text box is specifically a line box surrounding the text, and the text box can be surrounded by multiple A line box for a line of text, or a line box surrounding a line of text. The text box refers to the box formed by the connection of four image coordinates that can contain the text in the image recognized by the text detection model. Wherein, the text box in the area where the text is located may be a quadrilateral, and the quadrilateral may be represented by the coordinates of four corner points. The form of the return value of the text detection model can be specifically expressed as {(x1, y1), (x2, y2), (x3, y3), (x4, y4)}. When the quadrilateral is a rectangle, the text box can also be characterized by a center point and an offset from one of the corner points to the center point. Correspondingly, the form of the return value of the text detection model can be specifically expressed as {(x, y), (dx, dy)}. When the text box is arc-shaped, the text box can be represented by the center point position, arc radius and angle. The text box includes multiple text characters, and the text direction can be obtained according to the sorting method of the text characters.

Please refer to Figure 10a, for example, the text is "ABCD", get the upper and lower coordinates 1 and 2 of the character "A" away from the character "BCD", and get the upper and lower coordinates 1 and 2 of the character "D" away from the character "BCD" Coordinates 3 and 4, combined with the coordinates of four points: 1, 2, 3 and 4, the frame surrounded by the coordinates of these four points is the text box, and the sorting direction of the text characters in the text box is the text direction, The direction H is shown by the arrow in Figure 10a. For example, if the text is "OPQR", get the upper and

lower coordinates

5 and 6 of the character "O" away from the character "PQR", and get the upper and

lower coordinates

7 and 8 of the character "R" away from the character "OPQ", Combining the coordinates of four points: 5, 6, 7 and 8, the frame surrounded by the coordinates of these four points is the text box, and the sorting direction of the text characters in the text box is the text direction, as shown by the arrow in Figure 10a Direction K shown. It can be understood that the text sorting direction is consistent with the text box direction. That is, the text box 1234 in FIG. 10a also extends along the direction H, and the text box 5678 also extends along the direction K.

In one of the possible implementations, the OCR model uses the text box to mark the corresponding character area, and calculates the score (ie confidence level) of the text in the character area. When the confidence level is greater than or equal to a certain threshold, it is considered that the character area exists text, the output text box. If the confidence is less than a certain threshold, it is considered that there is no text in the character area, and no text box is output.

In the embodiment of the present application, the text detection model may be a conventional lightweight OCR model, the content of which is the same as that of the prior art, and will not be repeated here.

In one of the possible implementations, the OCR model used in the embodiment of the present application may be a lightweight OCR model. Compared with the conventional OCR model, the difference between the lightweight model in the embodiment of the present application is that the lightweight The OCR model can only detect the image of the scanning surface along a certain orientation, such as acquiring the unfolding direction of a book, and performing detection and scanning along the unfolding direction of the book. The conventional OCR model needs to detect and recognize the images on the scanned surface. Exemplarily, please refer to Figure 10b, the lightweight OCR model can use the Adaptive Bezier Curve Network (Real-time Scene Text Spotting with Adaptive Bezier-Curve Network, ABCNet) framework, ABCNet is an end-to-end trainable Scene text positioning frame. A single, unanchored convolutional neural network is used as the detection framework 71, and the detection framework may be composed of M superimposed convolutional layers, where M is an integer greater than 1. Using the Bezier curve detection results, the cubic Bezier curve 72, the Bezier alignment extraction curve sequence feature 73 and the lightweight identification module 74 are used. The lightweight OCR model can be applied to arbitrary-shaped scene text detection, and can recognize arbitrary-shaped text.

It can be understood that the shape of the text box is related to the text direction, that is, the sorting direction of the pre-text characters. If the text ordering is curved in the image and the text direction is curved, the text box will also be curved. The text sorting on conventional books is straight, based on the curvature of the scanning surface. For example, if you open a very thick book, the scanning surface will be curved to a certain extent, resulting in a certain degree of curvature in the text sorting on the scanning surface. The more curved the scanning surface, the more curved the scanning surface. The more curved the shape of the text box, the curved shape of the text box can represent the placement state of the scanning surface.

In the embodiment of the present application, the scanned image in FIG. 6 is input to the lightweight OCR model in FIG. 10b, and the text on page 61 and page 62 can be detected respectively to obtain the text boxes on the two pages. As shown in Figure 11, the curved shape of the text box on page 61 is consistent with the curved shape of page 61, and the curved shape of the text box on page 62 is consistent with the curved shape of page 62, both of which are curved, and the more curved the page, the more text on the page The more curved the sorted curve is, the curved shape of the text box can represent the curved shape of the scanned surface.

It can be understood that in the embodiment of the present application, the slope may also be obtained in other ways, which is not specifically limited in the embodiment of the present application.

In the following, the shape of the text box represents the curved shape of the scanning surface.

eliminate noise

In the embodiment of the present application, there may be arc-shaped text on the scanning surface, that is, the text order of the arc-shaped text on the plane area is also arc-shaped, such as the text box 1234 in Figure 10a. In the plane area, the text box 1234 is curved, while text box 5678 has a non-curved shape. When the text detection model performs text detection, the shape of the text box output by the arc text detection will also be arc-shaped, and the arc of the text box cannot represent the curvature of the scanning surface. Therefore, it is necessary to remove the arc-shaped text first. text box. The clustering method can be used to eliminate the interference of the arc text in the image including the scanned surface, and the interference can be eliminated according to the direction of the arc or the curvature of the arc, so as to avoid the interference in the image from causing deviation in the calculation of the text curve equation .

Calculate Text Curve Equation

In the embodiment of the present application, after the text boxes are detected according to the OCR model, a certain number of text boxes are sampled from the text boxes on the scanning surface, and the sampled text boxes are used to calculate the text curve equation. Referring to FIG. 11 , calculate the curved shape of page 61 in FIG. 6 , and select text box 610 , text box 611 , and text box 612 in page 61 .

Please refer to FIG. 12 , the text box 610 is used for illustration, the horizontal edge and the vertical edge of the carrier 201 are respectively used as the X axis and the Y axis, and the Cartesian coordinate system is established at a right angle to the carrier 201, and the central curve S of the text box 610 is extracted. The coordinates of each point above can be expressed as: x _t = x ₁ ,

Wherein, y ₁ and y ₂ are the vertical coordinates of the upper and lower boundaries of the text box, x _t is the horizontal coordinate of the central curve S of the text box 610 , and y _t is the vertical coordinate of the central curve S of the text box 610 . The obtained coordinates of each point are normalized to obtain a curve trajectory of the central curve S of the text box 610 .

In the embodiment of the present application, if only one text box is selected, the curve trajectory can be obtained by directly calculating the central curve of the text box. If multiple text boxes are selected, the center curves of the multiple text boxes can be obtained respectively, and the final center curve can be obtained by combining the multiple center curves. That is, for the plurality of text boxes, take the ordinate corresponding to each text box on the abscissa x _t , obtain the text box 610, and the ordinate on the central curve S corresponding to the abscissa x _t is y _t1 , and obtain the text box 611 , the vertical coordinate on the central curve S corresponding to the abscissa x _t is y _t2 , and the vertical coordinate on the central curve S corresponding to the horizontal coordinate x _t on the text box 612 is y _t3 , and the number of sampled text boxes is ordinates are averaged, then the ordinate corresponding to the abscissa x _t can be obtained

Normalize accordingly to obtain the final central curve. By combining the center curves of multiple text boxes, a curved shape representing the scanned surface is obtained.

In the embodiment of the present application, please refer to FIG. 11 , the starting position of the text box 610 is the starting position of the text on the page 61 , such as position a in FIG. 11 . The ending position of the text box 610 is the position where the text on the page 61 ends, such as position b in FIG. 11 . Where there is no text on the page, there is no text box, as shown in the blank area d in Figure 11. Based on the fact that there is no text in the blank area d, the scanning of this area can be performed not strictly according to the curved shape of the scanning surface, and the area defaults to Non-curved area, or calculate the scanning parameters of this area based on linear interpolation, so as to reduce the amount of calculation while ensuring accurate scanning and recognition of text on the scanning surface.

Fit Curve Equation

In the embodiment of the present application, sampling is performed according to the obtained central curve, so as to obtain the curve equation by fitting. For example, the points on the central curve S obtained in FIG. 12 are sampled at equal intervals to obtain N points on the coordinate system, where N is an integer greater than 1. The mathematical expression of the center curve of the text box is

Among them, m is the highest degree of the polynomial, x ⁱ represents the i power of x, and w is the coefficient; use polynomial fitting, and calculate the corresponding curve equation based on N points.

In the embodiment of the present application, after obtaining the curve equation, corresponding to a certain position, the slope of the central curve at that position can be calculated, so that the degree of curvature of the central curve S can be obtained from the slope of the central curve S, and then according to The degree of curvature of the central curve S results in a curved shape on the scanning surface. Subsequently, the scanning parameters corresponding to each position can be calculated according to the curve equation, so as to control the scanning component to perform corresponding operations.

In one of the possible implementations, if the object to be scanned is tilted, we can adjust the scanning direction. After the scanning direction is switched, the coordinate system needs to be converted according to the scanning direction, so as to facilitate subsequent control of the scanning surface according to the curved shape of the scanning surface. scan. Taking the upper left corner of the carrier as the origin, and rotating the horizontal axis OL along the direction of the scanning surface, the new rectangular coordinate OXY as shown in Figure 7 can be obtained.

rebuild coordinate system

Taking A ₁ A ₂ of the parallel rectangular frame A ₁ A ₂ A ₃ A ₄ as the horizontal axis, re-establish the coordinate system OXY, and obtain the coordinates of the rectangular frame A ₁ A ₂ A ₃ A ₄ in the new coordinate system OXY:

[x _i ′, y _i ′] ^T = M(θ)[x _i , y _i ] ^T (i=1, 2, ..6),

in:

Curve equation:

The parameter representation of the central curve equation y=f(x) in the OXY coordinate system:

Wherein the parameter t∈[t _min1 , t _max1 ], t _min1 =min(x ₁ , x ₄ ), t _max1 =max(x ₁ , x ₄ )]. According to t _min1 and t _max1 , the value range of the abscissa of the scanning surface area can be obtained, as shown in Figure 7, the x ₂ based on the coordinate A ₁ is the minimum value among (x ₁ , x ₂ , x ₃ , x ₄ ), Then t _min1 is x ₂ . Based on the x ₄ of the coordinate A ₄ is the maximum value in (x ₁ , x ₂ , x ₃ , x ₄ ), then t _max1 is x ₄ , then it can be determined that the abscissa range of the scanning area of the scanning surface is (x ₂ , _x4 ). Correspondingly, the value range of the ordinate can also be determined, but based on the fact that the scanning direction is the text direction, that is, the scanning component scans along the coordinate axis OX, only the value ranges t _min1 and t _max1 of the abscissa can be determined.

In the embodiment of the present application, when the curved shape of the scanning surface is not curved, that is, when the scanning surface is in a non-curved shape, corresponding scanning parameters are calculated according to the non-curved shape of the scanning surface. The curved shape of the scanning surface is curved, and corresponding scanning parameters are calculated according to the curved shape of the scanning surface. Then use the corresponding scanning parameters to control the corresponding scanning components, so that the scanning components scan the scanning surface in the corresponding position area according to the corresponding scanning parameters.

In the embodiment of the present application, the scanning parameters may be calculated according to the curved shape of the scanning surface, wherein the scanning parameters may include the moving rate for scanning the scanning surface, the emission direction of the scanning light and the reflection direction of the scanning light. The scanning of the scanning surface (moving speed, emission direction and reflection direction) will be described in detail below by controlling the slope of the curve on the scanning surface.

Movement Rate Calculation

In the embodiment of the present application, the function of the movement speed control is to ensure that the scanning speeds of the curved surface and the plane are consistent. That is, the larger the curvature of the curved surface, the slower the scanning component moves, which can effectively ensure that the scanning image in the direction of the curved surface will not be deformed and the scanned image will be clear. When determining the scanning surface, a pre-scan may be performed first, and the pre-scan is performed in the same way as the conventional scan, that is, it is performed at a constant first moving speed v ₀ . When performing the second scan, according to the set path planning, it may include scanning direction adjustment, text scanning, scanning direction adjustment and reset. During the second scan, the scanning plane is consistent with the conventional scanning method, that is, it is performed at a constant first moving rate v ₀ , that is, the first moving rate when scanning the non-curved area of the scanning surface is set as v ₀ . When scanning a curved area, it is necessary to control the second moving rate according to the first moving rate v ₀ and the curved shape of the curved surface when scanning a non-bending area.

Exemplarily, where the parameter t is the position of the scanning component, the entire interval [0, L] of t is divided into three segments from the initial position of the scan to the initial position range of the upper text area of the scanning surface 310: [0, t _min ], the scanning range of the text area on the scanning surface 310: [t _min , t _max ], the end position of the text on the scanning surface 310 to the end position of the scanning end [t _max , L], wherein, 0 is the initial scanning component scanning position, L is the end position of the scanning component scanning. t _min is the starting position of the text area, which may be the starting position a of the text box in FIG. 11 . t _max is the end position of the text area, which may be the end position b of the text box in FIG. 11 . [t _min , t _max ] is less than or equal to [t _min1 , t _max1 ], that is, the text area on the scanning surface is smaller than or equal to the area on the scanning surface.

Please refer to Fig. 13, the scanning track is shown in Fig. 13, the light source 212 moves along the edge A ₁ A ₂ of the scanning surface to the edge A ₃ A ₄ of the scanning surface, in order to ensure the continuity of the movement rate of the same scanning surface, its movement at each stage The rate can be set separately as:

In [0,t _min -δ], run at a constant first moving rate v ₀ , where δ>0, δ is the preset buffer distance, and δ can take the value of the width of area d in Figure 11, then t _min -δ Corresponding to the starting position A ₁ A ₂ of the scanning surface area A ₁ A ₂ A ₃ A ₄ , based on the fact that the area within this value range has no text content, it can be scanned at a constant first moving rate v ₀ , that is, the area can Scan as a plane area to reduce the amount of calculation.

At [t _min -δ,t _min ], it is known that the moving speed at t _min -δ is the first moving speed v ₀ , and the moving speed at t _min is the second moving speed, which can be calculated according to Calculated by the following formula (2), then the corresponding moving rate can be calculated by linear interpolation in [t _min -δ,t _min ], then the moving rate:

In [t _min ,t _max ], in order to ensure that the scanning speed of the scanning surface is consistent along the text scanning direction, it is subdivided into [t _min ,t _mid ] and [t _mid ,t _max ], where t _mid is The pagination position is the position A ₅ A ₆ shown in FIG. 7 .

In [t _min ,t _mid +δ ₀ /2], where δ ₀ >0, where δ ₀ is the preset buffer distance, and δ ₀ is the width of the pagination space, which can be the area between two connected pages, as shown in the figure Area d on page 61 in 11 and text blank area on page 62. Second movement speed:

Among them, the setting of formula (2) is based on the conversion of curves and straight lines,

is the slope of the central curve,

The t value at this position can be substituted into the curve equation to obtain the coordinate value of this position, and then obtain the slope of this position.

At [t _mid + δ ₀ /2, t _mid + δ ₀ ]: it is known that the moving rate at t _mid + δ ₀ /2 is the second moving rate v(t) at t _mid + δ ₀ /2, It can be calculated by formula (2). The moving speed at t _mid + δ ₀ is the second moving speed v(t) at t _mid + δ ₀ , which can be calculated according to the following formula (4). Then linear interpolation can be used in [t _mid +δ ₀ /2,t _mid +δ ₀ ], then the moving rate:

At [t _mid +δ ₀ ,t _max ]: second movement rate:

Among them, the formula (4) is the same as the formula (2), both are based on the conversion of the curve and the straight line,

is the slope of the central curve.

At [t _max , t _max +δ]: It is known that the moving speed at position t _max is the second moving speed v(t) at t _max , which can be calculated by formula (4). The moving rate at t _max + δ is the first constant moving rate v ₀ , then linear interpolation can be used at [t _max , t _max + δ], then the moving rate:

At [t _max +δ,L]: run with a constant first movement velocity v ₀ .

Then the first moving speed in the embodiment of the present application may be a preset speed v ₀ , which may be the default speed of the scanning device, and the non-curved area is scanned at the first moving speed. The second moving rate is calculated according to the conversion formula between curve and straight line, such as formula (2) or (4), to ensure that the rate of receiving scans on the curved area is consistent with the rate of receiving scans on the non-curved area (planar area). The bending regions with different bending degrees have different corresponding bending degrees, that is, different slopes, and thus have different second moving rate values.

Angle of scanning light

In the embodiment of the present application, the curved shape of the scanning surface is not curved, that is, the scanning surface is attached to the carrier, and the scanning surface is parallel to the carrier. For the scanning of the scanning surface, its optical path diagram is as shown in Figure 14, the scanning light is emitted by the light source 212, reflected back by the scanning surface 310 of the object 300 to be scanned, and then reflected by the first reflector 222 to the The second reflector 242 , the second reflector 242 reflects the received scanning light to the photoelectric conversion element 232 . The angle between the scanning light and the scanning surface 310 is the first angle α ₀ , and correspondingly, the angle between the scanning light and the horizontal plane is also the first angle α ₀ , and the light source can be controlled according to the angle α ₀ between the scanning light and the horizontal plane The direction in which the scanning light is emitted by 212 is the first emission direction.

In the embodiment of the present application, an object to be scanned with a certain degree of curvature is scanned, and the scanning surface of the object to be scanned is in a curved shape. In order to scan imaging without being affected by the curvature of the scanning surface, it is necessary to ensure that: the incidence of scanning light on the curved surface area on the scanning surface The angle is consistent with the plane area, and the scanning light reflected from the scanning surface can be smoothly reflected to the photoelectric conversion element through the first reflector. For this reason, the scanning light path diagram for the curved area of the scanning surface can be determined as shown in FIG. 15 .

According to the horizontal text optical path diagram shown in Figure 14, the emission angle and reflection angle of the scanning light in Figure 15 can be calculated, and the angle between the scanning light and the horizontal plane can be controlled according to the emission angle of the scanning light, and then according to the angle between the scanning light and the horizontal plane The emission direction of the scanning light emitted by the control light source is the second emission direction. The reflection direction of the scanning light reflected by the reflection surface 225 of the first reflector is controlled according to the reflection angle. The curved shape of the scanning surface can be determined by the text curve equation

represents, that is, using the slope of the central curve

To represent. Then the corresponding direction of the light source 212 and the reflection angle of the first reflector can be specifically expressed as:

The emission direction of the scanning light emitted by the light source 212 is calculated as follows. In order to ensure that the angle between the scanning light and the scanning surface is maintained as the first angle α0 ₍ such as 45 degrees), the angle between the scanning light and the plane where the carrier 201 is located satisfies:

The emission direction of the scanning light emitted by the light source 212 can be deduced according to the angle between the scanning light and the carrier 201 at the curved area, and then the direction and angle at which the light source 212 emits the scanning light can be controlled according to the derived emission direction of the scanning light.

Specifically, as shown in Figure 15, the plane where the carrier is located is abstracted as a straight line XY, and the scanning ray is incident on point M on the curved surface of the scanning surface, and the intersection point between the scanning ray and the plane where the carrier is located is N, that is, the scanning ray and the straight line XY intersects at point N, the slope of this M is

The intersection point between the tangent of point M on the curved surface and the plane where the carrier is located is P, and a triangle △MNP can be obtained, then the angle between the tangent of point M on the curved surface and the plane where the carrier is located is ∠P of △MNP is

The angle between the scanning light and the scanning surface, that is, the ∠M of △MNP is constant at α ₀ . According to the principle that one exterior angle of a triangle is equal to the sum of two non-adjacent interior angles, the angle ∠MNY between the scanning light and the plane where the carrier is located is obtained as

The deflection angle of the first reflector 222 reflective surface 225: in order to ensure that the scanning light reflected by the scanning surface 310 is reflected by the first reflector 222 such as an adjustable mirror (flexible mirror), the direction angle of the scanning light is parallel to the text direction, That is, ensure that the propagation direction of the scanning light reflected by the reflective surface 225 is parallel to the plane where the carrier is located.

First, the angle between the scanning light reflected by the scanning surface 310 and the plane where the carrier is located satisfies:

2α ₀ -α(t) (7)

Specifically, the scanning light is reflected by point M of the scanning surface 310, and the intersection point of the reflected scanning light and the plane where the carrier is located is H, that is, the reflected scanning light intersects the straight line XY at point H, then the incident scanning light, The reflected scanning light and the straight line XY form a triangle △MNH. According to the principle of reflection, the incident angle is equal to the reflection angle, and the angle ∠NMH on the tangent is π-2α ₀ . According to the interior angle sum theorem of the triangle, the angle ∠NMH of the triangle △MNH can be obtained H is π-(π-2α ₀ )-α(t), that is, 2α ₀ -α(t).

According to the principle of reflection, the angle β(t) between the reflective surface 225 of the first reflector 222 and the horizontal direction can be obtained as follows:

Specifically, the scanning light is reflected to the point Q of the reflective surface 225, the line XY and the line MQ intersect at the point H, and it can be obtained that the angle ∠MHX is equal to the angle ∠YHQ and is equal to 2α ₀ −α(t). Based on controlling the scanning light reflected by the reflective surface 225 to be parallel to the plane where the carrier is located, that is, to control the scanning light reflected by the reflective surface 225 to be parallel to the straight line XY. The scanning ray reflected by the reflective surface 225 of the first reflector is reflected to the point O of the second reflector, and the scanning ray QO is parallel to the straight line XY of the plane where the carrier is located, then the angle ∠YHQ is equal to the angle ∠HQO and is equal to 2α ₀ −α( t). Based on the fact that the reflection angle is equal to the incident angle, it can be obtained that the reflection angle of the scanning light on the reflection surface 225 is

That is, the reflection angle of the scanning light on the reflective surface 225 is

Based on the fact that the scanning light QO is parallel to the straight line XY of the plane where the carrier is located, that is, the scanning light QO is parallel to the horizontal plane, the angle between the reflective surface 225 and the horizontal plane can be obtained

In the embodiment of the present application, in order to ensure that the first included angle between the scanning light emitted by the light source and the scanning surface is constant. The angle between the scanning light and the plane where the carrier is located is

Then when scanning the non-curved area, the angle between the scanning light and the plane where the carrier is located is the second angle,

is 0, the second included angle is equal to the first included angle. When scanning the curved area, the angle between the scanning light and the plane of the carrier is the third angle,

If it is not 0, the third included angle is not equal to the first included angle. The third included angle is calculated according to the second included angle (the first included angle), the degree of curvature of the region (the slope of the position) and the formula (6).

In the embodiment of the present application, the reflective surface 225 of the first reflector is adjusted so that the scanning light reflected from the scanning surface enters the second reflector in the direction of the maximum light intensity, so that the photoelectric conversion element feels the maximum light. powerful. In order to ensure that the scanning light reflected by the reflective surface 225 is parallel to the horizontal plane, the included angle between the reflective surface 225 and the horizontal plane is

When scanning the non-curved area, the angle between the reflective surface 225 and the horizontal plane is the fourth angle, based on the fact that α(t) in the non-curved area is equal to α ₀ , the fourth angle

When α ₀ is fixed, the size of the fourth included angle β(t) is fixed, which is related to the size of the first included angle. When scanning the curved area, the included angle between the reflective surface 225 and the horizontal plane is the fifth included angle, based on the fact that the curved area α(t) is not equal to α ₀ , the fifth included angle

The size of the fifth included angle is related to the bending shape of the bending region.

In the embodiment of the present application, the slope of the central curve is used to represent the curved shape of the scanning surface, and then the corresponding scanning parameters are calculated according to the slope of the central curve, and the scanning of the scanning surface is controlled according to the curved shape of the scanning surface. It can be understood that other features can also be used to represent the curved shape of the scanning surface, and then the corresponding scanning parameters can be calculated.

In this embodiment of the present application, when the object to be scanned is scanned, the text type of the object to be scanned may also be obtained, and the image of the scanned surface is typesetting and output according to the type of the object to be scanned. Specifically, please refer to FIG. 16, step S161 scans the object to be scanned, step S162 performs object detection, determines the position of the object to be scanned on the glass table, and then obtains the scanned image of the object to be scanned according to the object detection, step S163 Scan an image for text detection. Step S164 determines the text type of the object to be scanned, such as double-sided card or book text. Step S165 performs template matching, determines whether it is a double-sided card or a book text, and then performs template matching according to different text types. If it is a double-sided card, cache the image of the currently scanned scanning side, wait for the scanning result of the other scanning side, and then assemble and typesetting the scanning results of the two scanning sides. If it is a book text, after correcting the scanning direction of the book, typesetting is carried out. Step S166 prints out.

Take ID card printing as an example to illustrate the automatic typesetting process. If the scanned object is detected to be a double-sided card text type, the card type automatic typesetting template will be triggered. After the scanning of the other side is completed, the results of both sides will be organized and combined with matching typesetting template for printout. Specifically, please refer to Fig. 17 together, scan the double-sided card text, obtain the scanned image 171 of one side of the ID card and the scanned image 172 of the other side of the ID card, respectively, and perform recognition and correction on the scanned image 171 and the scanned image 172, Obtain the image area 173 of scanning one scanning surface of the ID card in the scanned image 171, obtain the image area 174 of scanning the other scanning area of the ID card in the scanning image 172, assemble the image area 173 and the image area 174, A scanned image 175 is obtained.

In the embodiment of this application, a lightweight OCR model is used to detect and identify the text direction and text box position information of the object to be scanned, and construct a coordinate system based on the text box position, extract the center curve corresponding to the text box, and then fit through sampling The curve equation of the printed text can be obtained in the same way, and the curve equation is used to control the scanning direction of the printer, the reflection angle of the prism, etc.

In the embodiment of this application, the scanning path and scanning speed are planned and controlled. According to the text detection results, the placement angle of the light source is adjusted to ensure that the scanning direction of the light source is consistent with the direction of the text. At the same time, the position of the light source is adjusted up and down according to the spatial position of the scanning device Position, to ensure that no mechanical collision occurs; during the scanning process, the moving rate is adjusted in real time according to the text curve equation to ensure that the moving rate of the curved surface of the scanned object is consistent with that of the plane, and finally the curved text will not be deformed after scanning, ensuring the scanned image clear.

In the embodiment of the present application, for the control of the incident direction and reflection direction of the scanning light, when the light source scans the curved text, the light angle of the light source and the deflection angle of the first reflector are adjusted according to the text curve equation, so that the text on the curved surface The photosensitive direction is consistent with the photosensitive direction of the text on the plane, and the scanning light can be reflected to the photoelectric conversion element through the first reflector, so that the scanning area of the curved text is complete without deformation and blackened areas.

Next, the structure of the image forming apparatus provided by the embodiment of the present application will be introduced.

Please refer to FIG. 18 . FIG. 18 is a schematic structural diagram of an image forming apparatus provided by an embodiment of the present application.

The image forming device 181 may include a scanning device 200 , an imaging device 400 and a control device 500 .

The scanning device 200 is used for scanning the scanning surface of the object 300 to be scanned to obtain image data of the scanning surface. The scanning device 200 irradiates scanning light to the object to be scanned 300 , and reads the image of the object to be scanned 300 as image data by receiving the scanning light reflected by the object to be scanned 300 . Wherein, the scanning surface is the surface on which the scanning device 200 scans the object 300 to be scanned.

In one possible implementation manner, the scanning device 200 may execute the scanning method of the embodiment of the present application.

The imaging device 400 is used for reading the image data output by the scanning device 200, and printing on a recording medium (such as recording paper) based on the read image data. The imaging device 400 can save the image data, or output the image data to a computer display.

The control device 500 can be used to implement the scanning method of the embodiment of the present application, so as to control the scanning and imaging of the scanning device 200 and the imaging device. The control device 500 can integrate part of the functions of the scanning module 30 in the scanning device 200 to control the scanning of the scanning device 200 , and the control device 500 can also be used to control the printing of the imaging device 400 . The control device 500 may include control devices such as a CPU, ROM, and RAM, which are not shown. The CPU is a processor that executes various calculation processes. The ROM is a nonvolatile storage unit, and stores information such as a control program for causing the CPU to execute various processes in advance. The RAM is a volatile storage unit used as a temporary memory (work area) for various processes executed by the CPU. In the control device 500, the CPU executes various control programs prestored in the ROM. Thus, overall control of the imaging device is performed by the control device. In addition, the control device 500 may be constituted by an electronic circuit such as an integrated circuit (ASIC), or may be a control device 500 provided independently from a main control unit that controls the imaging device 400 as a whole.

In the embodiment of the present application, the image forming device 181 may be a printer or a copier, etc., and the printing process of the image forming device 181 will be described below with the image forming device 181 implemented as a printer:

Please refer to Figure 19. The user places the object to be printed on the printer booth, starts the first scan, that is, pre-scanning, and caches the scanned image pre-scanned by the printer to the local printer. This scanned image can be used as input for the OCR recognition process. In the identification and detection stage, the cached image data is used for object detection to obtain the corresponding scanning surface area, and then the OCR text detection is performed on the scanning surface area to obtain the text box range and text area, and based on this calculation, the curve equation of the page, the text location and other information. In the scanning positioning stage, according to the obtained scanning surface area and text area, locate the scanning area required for the second scan (ie scanning surface area), and plan the scanning path of the printer scanning component to ensure that the scanning direction is consistent with the text direction, And when the light source moves, it will not cause mechanical collision inside the printer due to space constraints. After the positioning is completed, perform the second scan to control the light source, and calculate the scanning parameters of the light source, such as the scanning direction for scanning the scanning surface, the emission direction of the scanning light, the posture of the light source, and the position of the light source. The scanning parameters are output to the first control component, so that the first control component controls the light source to perform scanning. The first reflector is controlled, and the scanning parameters of the first reflector are calculated, such as the scanning direction for scanning the scanning surface, the reflection direction of the scanning light reflected by the reflecting surface of the first reflector, and the posture of the first reflector. The scanning parameters for controlling the first reflector are output to the second control component, so that the second control component controls the first reflector to perform scanning. Movement rate control, when the light source of the printer scans and moves, it calculates the real-time rate according to the text curve equation, so that the movement rate in the entire curved scanning area remains consistent, that is, the greater the degree of bending, the slower the movement rate, and the corresponding movement of each position area The speed is output to the driving component for execution to drive the scanning component to move. The scanned results are cached locally, and intelligent typesetting is performed according to the text type of the scanned text, so that the layout of the final printing result is reasonable and the printed text is clear. Compared with traditional printers, the difference in physical structure of the printer in the embodiment of the present application lies in the adjustable light source, adjustable first reflector, adjustable moving direction and moving speed. When the printed text is tilted at a certain angle, the printer will adjust the light source angle so that the light scanning direction is consistent with the text direction; when the printed text is placed on the booth, there is a certain curvature relative to the horizontal plane (for example, printing a book), the printer will adjust the light emission angle to keep the angle between the light and the printed object constant, and the printer will also adjust the reflection angle of the first reflector to ensure that the light reflected by the curved text can smoothly propagate to the fixed prism , so that curved text can be printed normally.

The descriptions of the processes corresponding to the above-mentioned figures have their own emphasis. For the parts not described in detail in a certain process, you can refer to the relevant descriptions of other processes.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product for license plate number recognition includes one or more computer instructions for license plate number recognition. When these computer program instructions are loaded and executed on a computer, the process or function according to Figure 5 of the embodiment of the present application will be generated in whole or in part.

The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (eg coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example: floppy disk, hard disk, magnetic tape), an optical medium (for example: digital versatile disc (digital versatile disc, DVD)), or a semiconductor medium (for example: solid state disk (solid state disk, SSD) )Wait.

Those of ordinary skill in the art can understand that all or part of the steps for implementing the above embodiments can be completed by hardware, and can also be completed by instructing related hardware through a program. The program can be stored in a computer-readable storage medium. The above-mentioned The storage medium mentioned may be a read-only memory, a magnetic disk or an optical disk, and the like.

The above-mentioned embodiments provided by the application are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection scope of the application. Inside.

Claims

A scanning method, characterized in that the method comprises:

Determine the placement state of the scanning surface of the object to be scanned;

According to the arrangement state of the scanning surface, the scanning strategy associated with the arrangement state is used to scan the contents of the scanning surface to obtain a scanned image.
The method according to claim 1, wherein the arrangement state of the scanning surface comprises a bending state of the scanning surface, the scanning surface includes a first area and a second area; the first area and the The degree of bending corresponding to the second area is different; the scanning strategy includes the moving rate of the scanning component;

According to the placement state of the scanning surface, scanning the content of the scanning surface with a scanning strategy related to the placement state specifically includes:

The first area and the second area are scanned at different moving rates according to the degree of curvature of the first area and the second area.
The method according to claim 2, wherein the scanning strategy further includes the orientation of the scanning component, and the method further includes:

According to the arrangement state of the scanning surface, scanning the content of the scanning surface with a scanning strategy related to the arrangement state further includes:

According to the degree of curvature of the first area and the second area, the scanning component scans the first area and the second area in different orientations.
The method according to claim 3, wherein the scanning component includes a light source and a first reflector, the orientation of the scanning component includes the direction in which the light source emits scanning light, and/or the first reflector body orientation.
The method according to any one of claims 2 to 4, wherein the first region and the second region are scanned at different moving rates according to the degree of curvature of the first region and the second region. The second area, specifically includes:

controlling the scanning component to scan a non-curved area on the scanning surface at a first moving rate;

The scanning component is controlled to scan the curved area on the scanning surface at a second moving speed, wherein the first moving speed is greater than the second moving speed.
The method according to claim 5, wherein the second moving rate is a rate obtained according to the first moving rate and the bending state of the bending region.
The method according to claim 4, wherein the scanning component scans the first area and the second area in different orientations according to the degree of curvature of the first area and the second area comprises :

When scanning the non-curved area of the scanning surface, controlling the light source so that the scanning light forms a second angle with the carrier for carrying the object to be scanned;

When scanning the curved area of the scanning surface, the light source is controlled so that the scanning light forms a third included angle with the carrier; wherein the second included angle is different from the third included angle.
The method according to claim 7, wherein the third included angle is an angle obtained according to the second included angle and the bending state of the bending region.
The method according to claim 4, 7 or 8, wherein the scanning component scans the first area and the second area in different orientations according to the degree of curvature of the first area and the second area. The second area includes:

When scanning the non-curved area of the scanning surface, controlling the first reflector so that the reflective surface on the first reflector for reflecting the scanning light forms a fourth angle with the horizontal plane;

When scanning the curved area of the scanning surface, the first reflector is controlled so that the reflecting surface forms a fifth included angle with the horizontal plane, wherein the fourth included angle is different from the fifth included angle .
The method according to claim 9, wherein the fifth included angle is obtained according to the second included angle and the bending state of the bending region.
The method according to any one of claims 1 to 10, wherein the arrangement state of the scanning surface includes the arrangement angle of the scanning surface or the arrangement angle of the content in the scanning surface, and the scanning The policy includes the scanning direction of the scanning component;

According to the placement state of the scanning surface, scanning the content of the scanning surface with a scanning strategy related to the placement state specifically includes:

The scanning direction of the scanning component is adjusted according to the arrangement angle of the scanning surface or the arrangement angle of the contents in the scanning surface.
The method according to claim 11, wherein the scanning component comprises a light source and a first reflector;

The adjusting the scanning direction of the scanning component specifically includes:

adjusting the direction of movement of the light source; and/or,

Adjust the moving direction of the first reflector.
The method according to any one of claims 1 to 12, wherein the placement state of the scanning surface includes the placement position of the scanning surface, the scanning strategy includes the moving path of the scanning component, and the moving The path includes the scan start point and the scan end point;

According to the placement state of the scanning surface, scanning the content of the scanning surface with a scanning strategy related to the placement state specifically includes:

According to the placement position of the scanning surface, the moving path of the light source is adjusted.
The method according to any one of claims 1 to 13, wherein the determining the placement state of the scanning surface of the object to be scanned comprises:

The curvature of the scanning surface is acquired to obtain the curvature state of the scanning surface.
The method according to any one of claims 1 to 13, wherein the determining the placement state of the scanning surface of the object to be scanned comprises:

performing text detection on the scanned surface to obtain a text box;

obtaining the curve on the scanning surface according to the text box;

Create a coordinate system;

Acquiring the slope of the curve on the coordinate system to obtain the curvature state of the scanning surface.
A scanning device, characterized in that it comprises:

The carrier is used to carry the object to be scanned;

a light source, configured to emit scanning light irradiating the scanning surface of the object to be scanned;

The first reflector is used to receive the scanning light reflected by the scanning surface, and guide the scanning light to the photoelectric conversion element, so that the photoelectric conversion element converts the received scanning light into image data , to obtain the image of the scanning surface;

A controller, configured to execute the scanning method according to any one of claims 1 to 15, so as to control the scanning of the object to be scanned by the light source and the first reflector.
The scanning device according to claim 16, characterized in that,

The moving speed of the light source and the first reflector during scanning can be adjusted.
A scanning device as claimed in claim 16 or 17, characterized in that,

The moving direction of the light source and the first reflector during scanning can be adjusted.
The scanning device according to any one of claims 16 to 18, further comprising a drive assembly,

The drive assembly drives the light source and the first reflector to scan the non-curved area on the scanning surface at a first moving rate;

The driving assembly drives the light source and the first reflector to scan the curved area on the scanning surface at a second moving rate, wherein the first moving rate is greater than the second moving rate.
The scanning device according to any one of claims 16 to 19, characterized in that,

The direction in which the light source emits the scanning light can be adjusted.
The scanning device according to any one of claims 16 to 20, characterized in that,

The position of the light source can be adjusted so that the light source is located in the range where the light source is allowed to move.
The scanning device according to any one of claims 16 to 21, characterized in that,

The placement angle of the light source can be adjusted.
The scanning device according to any one of claims 16 to 22, characterized in that,

The attitude of the first reflector can be adjusted.
An image forming device, comprising:

The scanning device according to any one of claims 16 to 23;

an imaging device, configured to read the image data output by the scanning device, and print a recording medium based on the image data;

The control device is used to control the scanning device and the imaging device.
An electronic device, characterized in that it includes a processor and a memory; the memory is used to store instructions; the processor is used to call the instructions in the memory, so that the electronic device performs as claimed in claims 1 to The scanning method described in any one of 15.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, the scanning according to any one of claims 1 to 15 is realized method.