CN114726965A - Image acquisition device and image acquisition method - Google Patents
Image acquisition device and image acquisition method Download PDFInfo
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- CN114726965A CN114726965A CN202110007207.1A CN202110007207A CN114726965A CN 114726965 A CN114726965 A CN 114726965A CN 202110007207 A CN202110007207 A CN 202110007207A CN 114726965 A CN114726965 A CN 114726965A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/047—Detection, control or error compensation of scanning velocity or position
Abstract
The invention provides an image acquisition device which comprises at least one light-emitting unit, an image sensor and a processing unit. Wherein, each of the at least one light-emitting unit outputs at least one reference beam to the object to be detected. The image sensor receives at least one reference beam reflected from the object to be measured and generates a plurality of pixel data according to the object to be measured. The processing unit generates a correction image after rearranging, partially deleting or partially adding the pixel data according to at least one reference beam received by the image sensor. The invention also comprises an image acquisition method.
Description
Technical Field
The present invention relates to an image capturing device and an image capturing method, and more particularly, to an image capturing device and an image capturing method capable of accurately correcting image skew and facilitating portable operation.
Background
In the age of full electronic products, people's demands and requirements for images of life records, businesses, medicine and other contents are gradually increasing, and the form of recording images by the public is gradually changed from the early traditional negative film to the digital file as a recording form. Particularly, for the planar images frequently used in the commercial or medical fields, the requirement for the accuracy of the images is severe, and it is easy to generate serious identification and judgment results due to insufficient accuracy of the acquired images, thereby causing loss of life safety or property. Therefore, the correction of the image becomes an important issue.
In the prior art, in order to acquire a correct image, an image scanning device with a fixed structure is usually adopted to avoid the situation that a user cannot adjust an optimal object placing distance and the like. The image scanning device adopts the adjusted object placing platform with fixed distance, so that the maximum resolution of all pixel structures can be fully exerted. However, such stationary scanning devices that use a fixed object distance are typically bulky and relatively heavy, such as scanners, fax machines, multi-function peripheral machines, or other desktop scanners. Alternatively, if the image of the object to be measured is collected in a non-fixed manner, the object to be measured is held by a hand or a digital camera is installed on a supporting rack. Since there is no way for a general user to correct the horizontal position of the object and the horizontal position of the digital camera at the same time during operation, a skew image is easily acquired, and an edge correction process, such as keystone correction, is required to be performed on the acquired skew image so that the entire image is close to reality.
However, the prior art processes for capturing and correcting the skewed image require that the boundary (usually, the portion with larger contrast difference) of the skewed image must be first found and marked. Then, the whole skew image is extended or compressed in two dimensions by using a specific application program. However, in the process of two-dimensional stretching or compressing the skew image, there is a high possibility that the fine texture is shifted, so that the proportional relationship among the multiple textures is incorrect (for example, the face and mouth are skewed), and the corrected skew image is more distorted. Furthermore, it is difficult for a user to control the distance between the object and the digital camera every time the user acquires an image, so that the maximum resolution of all pixel structures cannot be achieved.
Therefore, how to design an image capturing device and an image capturing method, and particularly to solve the technical problems of the prior art that the image is inconvenient to carry, the corrected image is more distorted, and the maximum resolution of all pixel structures cannot be achieved, is an important subject of the research of the present inventors.
Disclosure of Invention
An object of the present invention is to provide an image capturing device, which can avoid the technical problems of inconvenient carrying, distorted corrected skewed image and inability to achieve the maximum resolution of all pixels in the prior art, and achieve the purposes of convenient carrying, high accuracy and high resolution.
In order to achieve the above object, the present invention provides an image capturing device for an object to be measured, the image capturing device comprising: at least one light emitting unit, an image sensor and a processing unit. Wherein each of the at least one light emitting unit outputs at least one reference beam to the object to be measured. The image sensor receives at least one reference beam reflected from the object to be measured and generates a plurality of pixel data according to the object to be measured. The processing unit is coupled with at least one light-emitting unit and the image sensor, and generates a correction image after at least one of rearrangement, partial deletion and partial addition is carried out on the pixel data according to at least one reference beam received by the image sensor.
Further, in the image capturing device, the image sensor includes a plurality of pixel units, and the plurality of pixel units generate a plurality of pixel data. At least one of the pixel units receives at least one reference beam, the reference beam is marked as a light spot by the processing unit, and the processing unit rearranges, partially deletes and partially adds at least one of the pixel data according to the position of the light spot on the pixel units.
Further, in the image capturing device, each of the at least one light emitting unit includes at least one of a laser light emitting unit and a non-visible light emitting unit.
Furthermore, in the image capturing device, the number of the at least one light emitting unit is plural, and the at least one light emitting unit is disposed around the outside of the image sensor and arranged in a circle, an ellipse or a polygon.
Furthermore, the image capturing device further includes a housing and a flexible support. The shell is used for accommodating at least one light-emitting unit and the image sensor. The flexible bracket is connected with the shell, and the position and the distance of the shell corresponding to the object to be measured are adjusted.
Further, the image capturing device further includes a storage unit, which is coupled to the processing unit and stores factory settings. The processing unit rearranges, partially deletes and partially adds the pixel data according to factory settings and at least one reference beam received by the image sensor.
Another objective of the present invention is to provide an image capturing method, which can avoid the technical problems of inconvenient carrying, distorted corrected skewed image and inability to achieve the maximum resolution of all pixels in the prior art, so as to achieve the purposes of convenient carrying, high accuracy and high resolution.
In order to achieve the above-mentioned another object, the present invention provides an image capturing method applied to an object to be measured, and the image capturing method includes the following steps: and adjusting at least one reference beam output to the object to be detected to enable the at least one reference beam to be parallel to the optical axis of the image sensor. And adjusting the position of the at least one reference beam corresponding to the object to be measured to enable the at least one reference beam to be projected to a preset position. When the at least one reference beam is parallel to the optical axis and the at least one reference beam is projected to the preset position, factory settings are generated. The image sensor generates a plurality of pixel data according to the object to be measured. Generating a correction image after at least one of rearranging, partially deleting and partially adding the pixel data according to factory settings and at least one reference beam reflected from the object to be detected and received by the image sensor.
Further, in the image capturing method, the image sensor includes a plurality of pixel units for generating a plurality of pixel data, and the method further includes the following steps: when the image sensor receives at least one reference beam, at least one of the plurality of pixel units receives the at least one reference beam and is marked as a light spot. At least one of rearrangement, partial deletion and partial addition is performed on the pixel data according to the positions of the light spots on the pixel units.
Further, the image capturing method further includes the following steps: and adjusting the distance between the image sensor and the object to be detected corresponding to at least one light-emitting unit outputting at least one reference beam.
Furthermore, in the image capturing method, the number of the at least one light emitting unit is plural, and the at least one light emitting unit is arranged around the image sensor and arranged in a circle, an ellipse or a polygon.
When the image acquisition device and the image acquisition method are used, at least one reference beam output to the object to be detected can be adjusted before delivery, so that the at least one reference beam is parallel to the optical axis of the image sensor, and delivery settings related to the preset position are generated. Then, when a general user uses the image acquisition device, the image sensor can be directly used for shooting the object to be detected according to the current environment so as to generate a plurality of pixel data, and the accuracy of correcting the environment or a laboratory before leaving a factory is not needed. Finally, the processing unit can generate a correction image after at least one of rearrangement, partial deletion and partial addition of the pixel data according to factory settings and at least one reference beam reflected from the object to be detected and received by the image sensor. That is, the processing unit can know the offset of at least one reference beam in the current environment according to the pre-stored information about the reference beams and the preset positions in the factory settings, and then at least one of rearrange, partially delete and partially add the pixel data. Since the correction is performed before the plurality of pixel data are combined into the corrected image, there is no problem of loss of resolution and no incorrect proportional relationship between the plurality of textures (for example, the face is tilted or the mouth is tilted).
Therefore, the image acquisition device and the image acquisition method can avoid the technical problems that the prior art is inconvenient to carry, the corrected skew image is more distorted and the maximum resolution formed by all pixels cannot be exerted, and further achieve the purposes of convenient carrying, high accuracy and high resolution.
For a further understanding of the nature, means, and efficacy of the invention to be achieved, reference should be made to the following detailed description of the invention and accompanying drawings which are believed to be in full and illustrative embodiments of the invention, and the same will be understood by reference to the following drawings, which are provided for purposes of illustration and description and are not intended to be limiting.
Drawings
FIG. 1 is a system architecture diagram of an image capture device according to the present invention;
FIG. 2 is a schematic view of an image capturing device according to the present invention;
fig. 3 is a bottom view of the housing of the image capturing device according to the first embodiment of the present invention;
FIG. 4 is a schematic view of factory calibration of the image acquisition method of the present invention;
FIGS. 5A and 5B are factory calibration flow charts of the image acquisition method of the present invention;
FIGS. 6 to 8 are schematic views illustrating the operation of the image capturing method according to the present invention;
FIG. 9 is a flowchart illustrating the operation of the image capturing method according to the present invention;
FIG. 10 is a bottom view of a housing of an image capturing device according to a second embodiment of the present invention;
FIG. 11 is a bottom view of a housing of an image capturing device according to a third embodiment of the present invention; and
fig. 12 is a bottom view of a housing of an image capturing device according to a fourth embodiment of the present invention.
In the figure:
10 a light emitting unit; 11: a reference beam; 20, an image sensor; 21, a pixel unit; 30, a processing unit; 40, a storage unit; factory setting 41; 50, a lens; 60, a shell; 100, a shell; 200, a flexible bracket; 300, a connector; 400, an object to be detected; c, the central position; h is distance; pi, Pj, Pn and Pm are preset positions; p 'i, P' j are positions; A. b, the position of the light spot; S1-S7.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
Referring to fig. 1 to 3, fig. 1 is a system architecture diagram of an image capturing device according to the present invention; FIG. 2 is a schematic view of an image capturing device according to the present invention; fig. 3 is a bottom view of the housing of the image capturing device according to the first embodiment of the present invention.
The image capturing device of the present invention can be applied to an object (not shown), and the image capturing device can include: at least one light emitting unit 10, an image sensor 20, a processing unit 30 and a storage unit 40. Wherein each of the at least one light emitting unit 10 outputs at least one reference beam (not shown) to the object to be measured. In the first embodiment of the present invention, each of the at least one light emitting unit 10 may include at least one of a laser light and a non-visible light emitting unit, and is disposed adjacent to the image sensor 20 (as shown in fig. 3). The invisible light may include Infrared (IR) or Ultraviolet (UV).
The image sensor 20 receives at least one reference beam reflected from the object and generates a plurality of pixel data according to the object. Further, the image sensor 20 may include a plurality of pixel units 21, and the plurality of pixel units 21 are used for generating the plurality of pixel data. At least one of the plurality of pixel units 21 can receive at least one reference beam, and the partial pixel units 21 that have received the at least one reference beam can be marked as light spots by the processing unit 30.
The processing unit 30 may be coupled to at least one light emitting unit 10 and the image sensor 20. The image sensor 20 may include: a charge-coupled device (CCD), a Complementary Metal Oxide Semiconductor (CMOS), or the like. Then, the image sensor 20 can convert the optical signal in the light into an electrical signal with a specific electrical property.
The storage unit 40 is coupled to the processing unit 30 and stores factory settings 41. In the first embodiment of the present invention, the processing unit 30 can generate a corrected image (not shown) after at least one of rearranging, partially deleting and partially adding the pixel data according to the factory setting 41, the positions of the light points on the pixel units 21, and the at least one reference beam received by the image sensor 20.
In the first embodiment of the present invention, the image capturing device may further include: a housing 100, a flexible holder 200 and a connector 300. The housing 100 may accommodate at least one light emitting unit 10 and an image sensor 20. The flexible bracket 200 can be connected to the housing 100, and can adjust the position and distance of the housing 100 corresponding to the object to be measured. The connector 300 is coupled to the flexible holder 200 and can be inserted into a computer host or other electronic equipment, and the connector 300 is used for supporting the flexible holder 200 and enabling the image sensor 20 to perform data transmission through the flexible holder 200 and the connector 300. The connector 300 may be a USB port, but the invention is not limited thereto.
Further, the image capturing device may further include: a lens 50 and a housing 60. The housing 60 covers the lens 50 and the image sensor 20, and the lens 50 is exposed on one side surface of the housing 60. As shown in fig. 3, the lens 50 may be disposed between the object 400 and the image sensor 20 to condense the light reflected from the object 400 and input the light to the image sensor 20. And further, the light emitting units 10 may be two and may be configured as shown in fig. 3 with respect to preset positions Pi, Pj, Pn, and Pm. The two light emitting units 10 may correspond to the predetermined positions Pi and Pj of the dut 400.
Please refer to fig. 4 to 5B, wherein fig. 4 is a schematic diagram of factory calibration of the image capturing method according to the present invention; fig. 5A and 5B are factory calibration flow charts of the image capturing method of the present invention. The numbers of the other related elements can refer to the foregoing description and drawings, and are not repeated herein.
When the image acquisition device of the invention is used for factory calibration, the following scheme can be provided:
« for the first mobile device, as shown in fig. 5A, the distance between the casing 100 and the center C of the object 400 is set to H, i.e. the distance between the image sensor 20 and the at least one light-emitting unit 10 outputting at least one reference beam corresponding to the object 400 is adjusted to H (step S1). Then, the position of the housing 100, i.e., the position of at least one reference beam corresponding to the object 400 to be measured, is adjusted, so that the two reference beams are projected to the predetermined positions Pi and Pj (step S2). Finally, after ensuring that the at least one reference beam is parallel to the optical axis of the image sensor 20, the information of the at least one reference beam reflected from Pi and Pj received by the image sensor 20 is stored to generate the factory setting 41 (step S3).
« the second mobile device as shown in fig. 5B, adjusts the at least one reference beam outputted to the object 400 to make the at least one reference beam parallel to the optical axis of the image sensor 20 (step S4). Then, the position of the housing 100 is adjusted to project the two reference beams to Pn and Pm at the predetermined positions (step S2). Finally, the information of at least one reference beam reflected from Pn and Pm received by the image sensor 20 is stored to generate the factory setting 41 (step S3).
Please refer to fig. 6 to 9, wherein fig. 6 to 8 are schematic operation diagrams of the image capturing method according to the present invention; FIG. 9 is a flowchart illustrating an operation of the image capturing method according to the present invention. The numbers of the other related elements can refer to the foregoing description and drawings, and are not repeated herein.
As shown in fig. 6, if the object 400 is parallel to the light emitting units 10 and the image sensor 20, the reference beams 11 can be regarded as being parallel to the optical axis of the image sensor 20. The reference beams 11 can be projected to the predetermined positions Pi and Pj of the object 400, and then projected to the image sensor 20 after passing through the lens 50 to be once interlaced. At this time, the spot position recorded on the image sensor 20 may be regarded as factory setting.
As shown in fig. 7, when the user operates the image capturing device of the present invention, the object 400 may not be parallel to the light emitting units 10 and the image sensor 20, and the positions of the reference beams 11 projected onto the object 400 may become P 'i and P' j. Further, the position offset of each of the reference beams 11 in the pixel units 21 of the image sensor 20 may not be the same according to the inclination of the object 400. At this time, the position of the light spot recorded on the image sensor 20 is shifted from factory settings.
As shown in fig. 8 and 9, the image sensor 20 can generate a plurality of pixel data according to the object 400 (step S5). In the plurality of pixel units 21 of the image sensor 20, if the factory-set spot position is a, and the user operates the image capturing device of the present invention, the spot position recorded on the image sensor 20 is B. At this time, the processing unit 30 can determine the offset degree of the object 400 with respect to the image sensor 20 according to the positions of the light spots on the pixel units 21 (step S6). Then, the processing unit 30 generates a corrected image after at least one of rearrangement, partial deletion and partial addition is performed on the plurality of pixel data (step S7). In addition, the processing unit 30 can also determine the relative distance between the object 400 and the image sensor 20 according to the intensity of the optical signal.
Please refer to fig. 10 to 12, wherein fig. 10 is a bottom view of a housing of an image capturing device according to a second embodiment of the present invention; fig. 11 is a bottom view of a housing of an image capturing device according to a third embodiment of the present invention; fig. 12 is a bottom view of a housing of an image capturing device according to a fourth embodiment of the present invention.
As shown in fig. 10, in the second embodiment of the present invention, substantially the same as the first embodiment, the number of at least one light emitting unit 10 is three, and the plurality of light emitting units 10 are arranged in a triangle and are arranged outside the image sensor 20.
As shown in fig. 11, in the third embodiment of the present invention, which is substantially the same as the second embodiment, a plurality of light emitting units 10 are disposed outside the image sensor 20 and arranged in a circular or elliptical shape.
As shown in fig. 12, in the fourth embodiment of the present invention, substantially the same as the second embodiment, a plurality of light emitting units 10 are disposed outside the image sensor 20 and arranged in a rectangular shape.
When the image capturing device and the image capturing method according to the present invention are used, the at least one reference beam 11 output to the object 400 to be measured may be adjusted before factory shipment, so that the at least one reference beam 11 is parallel to the optical axis of the image sensor 20, and the factory setting 41 related to the preset position is generated. Then, when a general user uses the image capturing device, the image sensor 20 can directly capture the object 400 to generate a plurality of pixel data according to the current environment without the need of calibrating the environment or the laboratory before the factory shipment.
Finally, the processing unit 30 may generate the calibration image after at least one of rearranging, partially deleting and partially adding the plurality of pixel data according to the factory setting 41 and the at least one reference beam 11 reflected from the object 400 received by the image sensor 20. That is, the processing unit can know the offset of at least one reference beam 11 in the current environment according to the pre-stored information about the reference beams 11 and the preset positions in the factory settings 41, and then at least one of rearrange, partially delete and partially add the pixel data. Since the correction is performed before the plurality of pixel data are combined into the corrected image, there is no problem of loss of resolution and no incorrect proportional relationship between the plurality of textures (for example, the face is tilted or the mouth is tilted).
Therefore, the image acquisition device and the image acquisition method can avoid the technical problems that the prior art is inconvenient to carry, the corrected skew image is more distorted, and the maximum resolution formed by all pixels cannot be exerted, thereby achieving the purposes of convenient carrying, high accuracy and high resolution.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. An image acquisition device is applied to an object to be measured, and is characterized by comprising:
at least one light emitting unit, each of which outputs at least one reference beam to the object to be measured;
an image sensor for receiving the at least one reference beam reflected from the object to be measured and generating a plurality of pixel data according to the object to be measured; and
and the processing unit is coupled with the at least one light-emitting unit and the image sensor and generates a correction image after at least one of rearrangement, partial deletion and partial addition is carried out on the pixel data according to the at least one reference beam received by the image sensor.
2. The image capturing device as claimed in claim 1, wherein the image sensor comprises:
a plurality of pixel units for generating the pixel data;
wherein, at least one of the plurality of pixel units receives the at least one reference beam and is marked as a light spot by the processing unit, and the processing unit rearranges, partially deletes and partially adds at least one of the plurality of pixel data according to the position of the light spot on the plurality of pixel units.
3. The image capturing device as claimed in claim 1, wherein each of the at least one light emitting unit includes at least one of a laser and a non-visible light emitting unit.
4. The image capturing device as claimed in claim 1, wherein the at least one light emitting unit is plural in number, and the at least one light emitting unit is disposed around the image sensor and arranged in a circle, an ellipse or a polygon.
5. The image capturing device of claim 1, further comprising:
a housing for accommodating the at least one light-emitting unit and the image sensor; and
and the flexible bracket is connected with the shell and adjusts the position and the distance of the shell corresponding to the object to be measured.
6. The image capturing device of claim 1, further comprising:
a storage unit coupled to the processing unit and storing a factory setting;
the processing unit rearranges, deletes and adds the pixel data according to the factory setting and the at least one reference beam received by the image sensor.
7. An image acquisition method applied to an object to be measured is characterized by comprising the following steps:
adjusting at least one reference beam output to the object to be detected to enable the at least one reference beam to be parallel to an optical axis of an image sensor;
adjusting the position of the at least one reference beam corresponding to the object to be measured to project the at least one reference beam to a preset position;
when the at least one reference beam is parallel to the optical axis and the at least one reference beam is projected to the preset position, generating a factory setting;
the image sensor generates a plurality of pixel data according to the object to be measured; and
generating a corrected image after at least one of rearranging, partially deleting and partially adding the pixel data according to the factory setting and the at least one reference beam reflected from the object to be detected and received by the image sensor.
8. The method of claim 7, wherein the image sensor comprises a plurality of pixel units for generating the pixel data, further comprising:
when the image sensor receives the at least one reference beam, at least one of the plurality of pixel units receives the at least one reference beam and is marked as a light spot; and
according to the positions of the light spot on the pixel units, at least one of rearrangement, partial deletion and partial addition is performed on the pixel data.
9. The image capturing method as claimed in claim 7, further comprising the steps of:
adjusting the distance between the image sensor and the object to be measured and at least one light-emitting unit outputting the at least one reference beam.
10. The method of claim 9, wherein the at least one light-emitting unit is disposed around the image sensor and arranged in a circle, an ellipse, or a polygon.
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