CN112995514B - Method and equipment for acquiring photo object distance of industrial camera - Google Patents
Method and equipment for acquiring photo object distance of industrial camera Download PDFInfo
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- CN112995514B CN112995514B CN202110237074.7A CN202110237074A CN112995514B CN 112995514 B CN112995514 B CN 112995514B CN 202110237074 A CN202110237074 A CN 202110237074A CN 112995514 B CN112995514 B CN 112995514B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/80—Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
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Abstract
The application aims to provide a method and equipment for acquiring a photo object distance of an industrial camera, wherein the method and equipment are used for acquiring a field angle of an industrial lens by responding to input operation of a user; the industrial lens is connected with the industrial camera, an industrial light source is arranged in a visual field covered by a visual field angle of the industrial lens, and a calibration plate is arranged above the industrial light source; focusing the industrial lens to ensure that the definition of the image in the industrial lens is optimal; after focusing is completed, obtaining a calibration image shot by the industrial camera on the calibration plate on the industrial light source and image information of the calibration image; according to the field angle of the industrial lens, the image information of the calibration image and the size information of the calibration plate, the actual object distance of the industrial lens is calculated, the actual object distance in the industrial lens is calculated, and the method is convenient, does not increase workload additionally, and is efficient and intelligent.
Description
Technical Field
The present disclosure relates to the field of computer technologies, and in particular, to a method and an apparatus for acquiring a photo distance of an industrial camera.
Background
In the prior art, products such as a camera lens are fixed in a pre-calculated object distance in a traditional imaging system, and the imaging definition of the camera is observed by manually adjusting the focal length of the lens until the imaging definition is proper, so that the actual object distance is difficult to measure by tools such as a ruler; and then, only the image in the shooting condition of the object distance can be imaged clearly in each image shooting, so that the efficiency and the intelligence are low.
Disclosure of Invention
An object of the present application is to provide a method and apparatus for acquiring a photo distance of an industrial camera, which not only can calculate an actual object distance, but also is convenient and does not increase workload additionally, so that the method and apparatus are efficient and intelligent.
According to one aspect of the present application, there is provided a method for acquiring a photo-object distance of an industrial camera, wherein the method includes:
responding to input operation of a user, and acquiring the field angle of the industrial lens; the industrial lens is connected with the industrial camera, an industrial light source is arranged in a visual field covered by a visual field angle of the industrial lens, and a calibration plate is arranged above the industrial light source;
focusing the industrial lens to ensure that the definition of the image in the industrial lens is optimal;
after focusing is completed, obtaining a calibration image shot by the industrial camera on the calibration plate on the industrial light source and image information of the calibration image;
and calculating the actual object distance of the industrial lens according to the field angle of the industrial lens, the image information of the calibration image and the size information of the calibration plate.
Further, in the above method, the method further includes:
controlling to turn on the industrial camera and the industrial light source in response to an on operation of the user;
responding to shooting trigger operation of the user, and displaying an input area;
generating and presenting prompt information for prompting the user to set the angle of view of the industrial lens in the input area.
Further, in the above method, the calculating the actual object distance of the industrial lens according to the field angle of the industrial lens, the image information of the calibration image, and the size information of the calibration plate includes:
calculating the corresponding size of a single pixel in the calibration image on the calibration plate according to the image information of the calibration image and the size information of the calibration plate;
calculating the visual field width corresponding to the visual field angle of the industrial lens based on the corresponding size of the single pixel on the calibration plate and the image information of the calibration image;
and obtaining the actual object distance of the industrial lens based on the field angle of the industrial lens and the corresponding field width of the industrial lens.
Further, in the above method, the method further includes:
displaying the actual object distance of the industrial lens.
According to another aspect of the present application, there is also provided a non-volatile storage medium having stored thereon computer readable instructions, which when executed by a processor, cause the processor to implement a method for acquiring a photo object distance of an industrial camera as described above.
According to another aspect of the present application, there is also provided an apparatus for acquiring a photo object distance of an industrial camera, wherein the apparatus includes:
one or more processors;
a computer readable medium for storing one or more computer readable instructions,
the one or more computer-readable instructions, when executed by the one or more processors, cause the one or more processors to implement a method of acquiring a photo object distance of an industrial camera as described above.
Compared with the prior art, the method and the device have the advantages that the field angle of the industrial lens is obtained by responding to the input operation of the user; the industrial lens is connected with the industrial camera, an industrial light source is arranged in a visual field covered by a visual field angle of the industrial lens, and a calibration plate is arranged above the industrial light source; focusing the industrial lens to ensure that the definition of the image in the industrial lens is optimal; after focusing is completed, obtaining a calibration image shot by the industrial camera on the calibration plate on the industrial light source and image information of the calibration image; according to the field angle of the industrial lens, the image information of the calibration image and the size information of the calibration plate, the actual object distance of the industrial lens is calculated, the actual object distance in the industrial lens is calculated, and the method is convenient, does not increase workload additionally, and is efficient and intelligent.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:
FIG. 1 illustrates a flow diagram of a method of acquiring photo-object distance of an industrial camera according to one aspect of the present application;
FIG. 2 illustrates a system block diagram in a method of acquiring photo-object distance of an industrial camera according to one aspect of the present application;
FIG. 3 is a schematic view of a camera module in a method for acquiring photo-object distance of an industrial camera according to an aspect of the present application;
fig. 4 is a flow chart of a practical application scenario of a method for acquiring a photo-object distance of an industrial camera according to an aspect of the present application.
The same or similar reference numbers in the drawings refer to the same or similar parts.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
In one typical configuration of the present application, the terminal, the device of the service network, and the trusted party each include one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer readable media, as defined herein, does not include non-transitory computer readable media (transmission media), such as modulated data signals and carrier waves.
Fig. 1 shows a flowchart of a method for acquiring a photo distance of an industrial camera according to an aspect of the present application, where the method includes steps S11, S12, S13, S14 and S15, and specifically includes the following steps:
step S11, responding to the input operation of a user, and acquiring the field angle of the industrial lens; the industrial lens is connected with the industrial camera, an industrial light source is arranged in a visual field covered by a visual field angle of the industrial lens, and a calibration plate is arranged above the industrial light source, wherein the industrial lens, the industrial camera, the industrial light source and the calibration plate form a camera module, as shown in fig. 2; here, the input operation of the user may be an operation including, but not limited to, clicking, double clicking, sliding, shaking, and the like.
Step S12, focusing the industrial lens to ensure that the definition of the image in the industrial lens is optimal; here, the industrial lens needs to be subjected to focusing processing according to the image definition of the industrial lens in the visual field range of the visual field angle, so that the image definition in the industrial lens is optimal, and the subsequent image shooting of the image to be shot by the industrial lens is facilitated.
Step S13, after focusing is completed, a calibration image shot by the industrial camera on the calibration plate on the industrial light source and image information thereof are obtained; here, the image information of the calibration image includes pixel-related information in the calibration image.
Step S14, calculating an actual object distance of the industrial lens according to the field angle of the industrial lens, the image information of the calibration image and the size information of the calibration plate.
Through the steps S11 to S15, the calculation of the actual object distance in the industrial lens is realized, and the method is convenient, does not increase the workload additionally, and is efficient and intelligent.
Following the above-described embodiments of the present application, the method further comprises:
controlling to turn on the industrial camera and the industrial light source in response to an on operation of the user;
responding to shooting trigger operation of the user, and displaying an input area;
generating and presenting prompt information for prompting the user to set the angle of view of the industrial lens in the input area.
For example, when a user needs to turn on an industrial camera and an industrial light source to shoot, the industrial camera and the industrial light source are controlled to be turned on in response to the turning-on operation of the user, wherein the turning-on operation includes, but is not limited to, clicking, double clicking, sliding a touch screen or physical keys; then, in response to a photographing triggering operation of the user, displaying an input area, wherein the input area can be a partial area or an entire area of a display touch screen; then, generating prompt information for prompting the user to set the field angle of the industrial lens in the input area, wherein the prompt information can comprise, but is not limited to, a character form, a voice form, a picture-text form, an animation form and the like; and the aim of prompting a user to set the angle of view of the industrial lens in the input area is fulfilled by presenting the prompting information in the input area.
Next, in step S12, focusing is performed on the industrial lens so that the image sharpness in the industrial lens is optimized; in step S13, after focusing the industrial lens is completed, a calibration image and image information thereof captured by the industrial camera on the calibration board on the industrial light source are obtained; then, the actual object distance of the industrial lens needs to be calculated, wherein the step S14 calculates the actual object distance of the industrial lens according to the field angle of the industrial lens, the image information of the calibration image, and the size information of the calibration plate, and specifically includes:
calculating the corresponding size of a single pixel in the calibration image on the calibration plate according to the image information of the calibration image and the size information of the calibration plate;
calculating the visual field width corresponding to the visual field angle of the industrial lens based on the corresponding size of the single pixel on the calibration plate and the image information of the calibration image;
and obtaining the actual object distance of the industrial lens based on the field angle of the industrial lens and the corresponding field width of the industrial lens.
For example, according to the image information of the calibration image and the size information of the calibration plate, calculating the corresponding size of the single pixel in the calibration image on the calibration plate, namely, since the size information of the calibration plate and the pixels in the image information of the calibration image of the shot calibration plate have a fixed proportion, under the condition that the size information of the calibration plate and the image information of the calibration image shot by the calibration plate are known, calculating the corresponding size of the single pixel in the calibration image of the calibration plate on the calibration plate; then, according to the number of pixels corresponding to the length and the width in the image information of the calibration image, calculating to obtain the field width corresponding to the field angle of the industrial lens through the number of pixels corresponding to the length and the width and the corresponding size of the single pixel on the calibration plate, wherein H is shown in fig. 3; then, based on the field angle of the industrial lens and the corresponding field width H, the actual object distance of the industrial lens can be calculated, as shown in WD in fig. 3, so as to realize calculation of the actual object distance of the industrial lens; in fig. 3, the industrial camera is the uppermost one, the industrial lens is connected under the industrial camera, and the solid black line corresponding to the field of view width H is a top view of the calibration plate, so that the solid black line is a solid line, and the industrial light source is arranged under the calibration plate.
Following the above-described embodiments of the present application, the method further comprises:
after the actual object distance of the industrial lens in the camera module is calculated, the actual object distance of the industrial lens is required to be displayed, so that the user can know the specific value of the actual object distance formed among the current industrial camera, the industrial light source and the industrial lens in time.
In an actual application scenario of the present application, as shown in fig. 4, when an industrial camera and an industrial light source pair are turned on, in step C801, a photographing trigger operation of a user displays an input area, and generates prompt information for prompting the user to set an angle of view of the industrial lens in the input area; step C802, presenting the prompt information to prompt a user to input the angle of view of the industrial lens in the input area; step C803, obtaining the field angle of the industrial lens input by a user; step C804, focusing the industrial lens so that the definition of the image in the industrial lens is optimal and the shot image is clear; step C805, putting the preselected calibration plate into a field of view covered by a field angle of an industrial lens, and shooting a clear image, namely a calibration image of the calibration plate; step C806, automatically calculating the actual object distance of the industrial lens by a calculation module in fig. 2 according to the image information of the calibration image of the calibration plate, the field angle of the industrial lens and the size information of the calibration plate; and step C807, displaying the actual object distance of the industrial lens, and realizing the calculation of the actual object distance in the industrial lens, thereby being convenient and not additionally increasing the workload and realizing high efficiency and intellectualization.
According to another aspect of the present application, there is also provided a non-volatile storage medium having stored thereon computer readable instructions, which when executed by a processor, cause the processor to implement a method for acquiring a photo object distance of an industrial camera as described above.
According to another aspect of the present application, there is also provided an apparatus for acquiring a photo object distance of an industrial camera, wherein the apparatus includes:
one or more processors;
a computer readable medium for storing one or more computer readable instructions,
the one or more computer-readable instructions, when executed by the one or more processors, cause the one or more processors to implement a method of acquiring a photo object distance of an industrial camera as described above.
For details of each embodiment of the apparatus for acquiring a photo distance of the industrial camera, reference may be made to the corresponding parts of the embodiment of the method for acquiring a photo distance of the industrial camera, which are not described herein.
In summary, the present application obtains the angle of view of an industrial lens by responding to an input operation of a user; the industrial lens is connected with the industrial camera, an industrial light source is arranged in a visual field covered by a visual field angle of the industrial lens, and a calibration plate is arranged above the industrial light source; focusing the industrial lens to ensure that the definition of the image in the industrial lens is optimal; after focusing is completed, obtaining a calibration image shot by the industrial camera on the calibration plate on the industrial light source and image information of the calibration image; according to the field angle of the industrial lens, the image information of the calibration image and the size information of the calibration plate, the actual object distance of the industrial lens is calculated, the actual object distance in the industrial lens is calculated, and the method is convenient, does not increase workload additionally, and is efficient and intelligent.
It should be noted that the present application may be implemented in software and/or a combination of software and hardware, for example, using Application Specific Integrated Circuits (ASIC), a general purpose computer or any other similar hardware device. In one embodiment, the software programs of the present application may be executed by a processor to implement the steps or functions as described above. Likewise, the software programs of the present application (including associated data structures) may be stored on a computer readable recording medium, such as RAM memory, magnetic or optical drive or diskette and the like. In addition, some steps or functions of the present application may be implemented in hardware, for example, as circuitry that cooperates with the processor to perform various steps or functions.
Furthermore, portions of the present application may be implemented as a computer program product, such as computer program instructions, which when executed by a computer, may invoke or provide methods and/or techniques in accordance with the present application by way of operation of the computer. Program instructions for invoking the methods of the present application may be stored in fixed or removable recording media and/or transmitted via a data stream in a broadcast or other signal bearing medium and/or stored within a working memory of a computer device operating according to the program instructions. An embodiment according to the present application comprises an apparatus comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein the computer program instructions, when executed by the processor, trigger the apparatus to operate a method and/or a solution according to the embodiments of the present application as described above.
It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. A plurality of units or means recited in the apparatus claims can also be implemented by means of one unit or means in software or hardware. The terms first, second, etc. are used to denote a name, but not any particular order.
Claims (5)
1. A method of acquiring a photo object distance of an industrial camera, wherein the method comprises:
responding to input operation of a user, and acquiring the field angle of the industrial lens; wherein the user input operation includes click, double click, slide and shake operations; the industrial lens is connected with the industrial camera, an industrial light source is arranged in a visual field covered by a visual field angle of the industrial lens, and a calibration plate is arranged above the industrial light source;
focusing the industrial lens according to the image definition of the industrial lens in the visual field range of the visual field angle so as to ensure that the image definition in the industrial lens is optimal;
after focusing is completed, obtaining a calibration image shot by the industrial camera on the calibration plate on the industrial light source and image information thereof, wherein the image information of the calibration image comprises pixel related information in the calibration image;
according to the field angle of the industrial lens, the image information of the calibration image and the size information of the calibration plate, calculating the actual object distance of the industrial lens comprises the following steps: calculating the corresponding size of a single pixel in the calibration image on the calibration plate according to the image information of the calibration image and the size information of the calibration plate; calculating the visual field width corresponding to the visual field angle of the industrial lens based on the corresponding size of the single pixel on the calibration plate and the image information of the calibration image; and obtaining the actual object distance of the industrial lens based on the field angle of the industrial lens and the corresponding field width of the industrial lens.
2. The method of claim 1, wherein the method further comprises:
controlling to turn on the industrial camera and the industrial light source in response to an on operation of the user;
responding to shooting trigger operation of the user, and displaying an input area;
generating and presenting prompt information for prompting the user to set the angle of view of the industrial lens in the input area.
3. The method according to claim 1 or 2, wherein the method further comprises:
displaying the actual object distance of the industrial lens.
4. A non-volatile storage medium having stored thereon computer readable instructions which, when executed by a processor, cause the processor to implement the method of any of claims 1 to 3.
5. An apparatus for acquiring a photo object distance of an industrial camera, wherein the apparatus comprises:
one or more processors;
a computer readable medium for storing one or more computer readable instructions,
the one or more computer-readable instructions, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1 to 3.
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