CN107979726B - Panoramic lens pairing method and panoramic lens - Google Patents
Panoramic lens pairing method and panoramic lens Download PDFInfo
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- CN107979726B CN107979726B CN201711217423.9A CN201711217423A CN107979726B CN 107979726 B CN107979726 B CN 107979726B CN 201711217423 A CN201711217423 A CN 201711217423A CN 107979726 B CN107979726 B CN 107979726B
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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
- H04N23/64—Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
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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
- H04N23/698—Control of cameras or camera modules for achieving an enlarged field of view, e.g. panoramic image capture
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Abstract
The application discloses a panoramic lens pairing method and a panoramic lens, comprising the following steps: the method comprises the steps that a plurality of camera modules to be tested shoot a first picture, and first white balance current parameters of the camera modules to be tested are obtained; automatically adjusting the white balance of each camera module to be tested according to each first white balance current parameter and the white balance standard parameter of the standard camera module; after automatic white balance adjustment, each camera module to be tested shoots a second picture, and a second white balance current parameter of each camera module to be tested is obtained; selecting the camera modules to be tested with the difference between the current parameters of the second white balance within the set range, and pairing the two camera modules to be tested. This application carries out automatic white balance to each camera module that awaits measuring and adjusts, has changed each passageway gain and has made the white balance parameter of self more close with white balance standard parameter, restores module color uniformity, and two liang of modules that the second white balance current parameter of selection was unanimous or close pair of component panoramic lens have guaranteed that the luminance of two modules is unanimous or the deviation is less.
Description
Technical Field
The invention relates to the technical field of camera shooting, in particular to a panoramic lens pairing method and a panoramic lens.
Background
At present, panoramic shooting of 360-degree panoramic cameras has multiple schemes, and one scheme is formed by using two fisheye camera modules back to back. However, due to differences between modules, the brightness and color of two cameras are inconsistent after the modules are paired and assembled, and the existing pairing method needs to find the module pairs with similar brightness and R/G, B/G, because three conditions are considered simultaneously, the difficulty in selecting is high, and all the modules cannot be paired one by one.
Therefore, how to simply and efficiently implement 360 ° panoramic lens pairing is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a method for pairing a panoramic lens and a panoramic lens, which can restore color consistency of modules, ensure brightness consistency or small deviation of the two modules, and are simple and efficient. The specific scheme is as follows:
a panoramic lens pairing method comprises the following steps:
the camera modules to be tested shoot a first picture, and a first white balance current parameter of each camera module to be tested is obtained;
performing automatic white balance adjustment on each camera module to be detected according to each first white balance current parameter and a white balance standard parameter of a standard camera module;
shooting a second picture by each camera module to be tested after automatic white balance adjustment, and acquiring a second white balance current parameter of each camera module to be tested;
and selecting the camera modules to be tested, of which the difference between the current parameters of the second white balance is within a set range, and pairing the camera modules to be tested pairwise.
Preferably, in the method for pairing panoramic lenses provided in the embodiment of the present invention, the capturing a first picture by a plurality of camera modules to be tested specifically includes:
within a set exposure time, a plurality of camera modules to be tested shoot a first picture; the central brightness of the first picture meets a set brightness range.
Preferably, in the method for pairing panoramic lenses provided in the embodiment of the present invention, acquiring a first white balance current parameter of each camera module to be tested specifically includes:
calculating the average value of a red channel, the average value of a green channel and the average value of a blue channel in the central area of the first picture;
and calculating the ratio of the red channel average value to the green channel average value and the ratio of the blue channel average value to the green channel average value according to the red channel average value, the green channel average value and the blue channel average value in the first picture center region so as to obtain the first white balance current parameters of each camera module to be tested.
Preferably, in the method for pairing a panoramic lens provided in the embodiment of the present invention, the white balance standard parameters of the standard camera module include a ratio of the red channel average value to the green channel average value, and a ratio of the blue channel average value to the green channel average value, which are calculated according to the red channel average value, the green channel average value, and the blue channel average value in the central area of the picture shot by the standard camera module.
Preferably, in the method for pairing panoramic lenses provided in the embodiment of the present invention, the obtaining of the second white balance current parameter of each camera module to be tested specifically includes:
calculating the average value of the red channel, the average value of the green channel and the average value of the blue channel in the central area of the second picture;
and calculating the ratio of the red channel average value to the green channel average value and the ratio of the blue channel average value to the green channel average value according to the red channel average value, the green channel average value and the blue channel average value in the second picture center region to obtain a second white balance current parameter of each camera module to be tested.
Preferably, in the method for pairing a panoramic lens provided in the embodiment of the present invention, the camera module to be tested and the standard camera module are both modules arranged in a color filter matrix.
The embodiment of the invention also provides a panoramic lens, which is formed by pairing the panoramic lens by adopting the pairing method provided by the embodiment of the invention.
The invention provides a panoramic lens pairing method and a panoramic lens, which comprise the following steps: the method comprises the steps that a plurality of camera modules to be tested shoot a first picture, and first white balance current parameters of the camera modules to be tested are obtained; automatically adjusting the white balance of each camera module to be tested according to each first white balance current parameter and the white balance standard parameter of the standard camera module; after automatic white balance adjustment, each camera module to be tested shoots a second picture, and a second white balance current parameter of each camera module to be tested is obtained; selecting the camera modules to be tested with the difference between the current parameters of the second white balance within the set range, and pairing the two camera modules to be tested. The invention carries out automatic white balance adjustment on each camera module to be tested, can change the gain of each channel to enable the self white balance parameter to be closer to the white balance standard parameter, restores the color consistency of the modules, pairs of the selected camera modules to be tested with the same or similar second white balance current parameter to form a panoramic lens, and can ensure the brightness consistency or the smaller deviation of the two modules.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a panoramic lens pairing method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a panoramic lens pairing method, as shown in fig. 1, comprising the following steps:
s101, shooting a first picture by a plurality of camera modules to be tested, and acquiring a first white balance current parameter of each camera module to be tested;
s102, carrying out automatic white balance adjustment on each camera module to be detected according to each first white balance current parameter and a white balance standard parameter of a standard camera module;
s103, shooting a second picture after the automatic white balance adjustment of each camera module to be detected, and acquiring a second white balance current parameter of each camera module to be detected;
s104, selecting the camera modules to be tested with the difference between the current parameters of the second white balance within a set range, and pairing the two camera modules to be tested.
In the method for pairing the panoramic lens provided by the embodiment of the invention, firstly, a plurality of camera modules to be tested shoot a first picture, and a first white balance current parameter of each camera module to be tested is obtained; then, automatically adjusting the white balance of each camera module to be tested according to each first white balance current parameter and the white balance standard parameter of the standard camera module; then shooting a second picture by each camera module to be tested after automatic white balance adjustment, and acquiring a second white balance current parameter of each camera module to be tested; and finally selecting the camera modules to be tested with the difference between the current parameters of the second white balance within the set range, and pairing the camera modules to be tested with each other to form the panoramic lens. Therefore, automatic white balance adjustment is carried out on each camera module to be detected, the gain of each channel can be changed to enable the white balance parameter of each channel to be closer to the white balance standard parameter, the color consistency of the modules is restored, the selected camera modules to be detected with the same or similar second white balance current parameters are paired pairwise to form the panoramic lens, and the consistency or the smaller deviation of the brightness of the two modules can be ensured.
Further, in a specific implementation, in the method for pairing panoramic lenses provided in the embodiment of the present invention, in step S101, the shooting a first picture by the multiple camera modules to be tested may specifically include:
within a set exposure time, a plurality of camera modules to be tested shoot a first picture; the central brightness of the first picture meets a set brightness range.
For example, the exposure time is set to a set value so that the center luminance of the first screen satisfies the green channel value of 128(8 bits). The specific set brightness range may be determined according to actual conditions, and may be a reasonable range, which is neither too bright nor too dark.
Further, in a specific implementation, in the method for pairing panoramic lenses provided in the embodiment of the present invention, the step S101 of obtaining the first white balance current parameter of each camera module to be tested may specifically include the following steps:
firstly, calculating a red R channel average value, a green G channel average value and a blue B channel average value in the central area of the first picture;
then, according to the red R channel average value, the green G channel average value and the blue B channel average value in the first picture center area, calculating a ratio R/G of the red R channel average value to the green G channel average value and a ratio B/G of the blue B channel average value to the green G channel average value to obtain a first white balance current parameter of each camera module to be tested.
In specific implementation, in the method for pairing a panoramic lens provided in the embodiment of the present invention, the white balance standard parameters of the standard camera module in step S102 may include: and calculating the ratio R/G of the red R channel average value to the green G channel average value and the ratio B/G of the blue channel average value to the green channel average value according to the red R channel average value, the green G channel average value and the blue B channel average value in the central area of the picture shot by the standard camera module. Thus, by comparing each of the current white balance parameters with the standard white balance parameters of the standard camera module, that is, in step S102, each R/G corresponding to the first image center region may be compared with the standard R/G corresponding to the standard camera module in the image center region captured by the standard camera module, and each B/G corresponding to the first image center region may be compared with the standard B/G corresponding to the standard camera module in the image center region captured by the standard camera module, the corresponding compensation data may be obtained, and the automatic white balance adjustment may be performed on each of the camera modules to be measured according to the compensation data.
Further, in a specific implementation, in the method for pairing panoramic lenses provided in the embodiment of the present invention, the step S103 of obtaining the second white balance current parameter of each camera module to be tested may specifically include the following steps:
firstly, calculating a red R channel average value, a green G channel average value and a blue B channel average value in the central area of the second picture;
then, according to the red R channel average value, the green G channel average value and the blue B channel average value in the second picture center area, calculating a ratio R/G of the red R channel average value to the green G channel average value and a ratio B/G of the blue B channel average value to the green G channel average value to obtain a second white balance current parameter of each camera module to be tested.
In specific implementation, in order to take account of the area and the number of the pixels, the camera module to be tested and the standard camera module can both be modules arranged by adopting a color filter matrix, wherein four channels are arranged in a four-pixel color filter matrix mode, namely a Gr channel, an R channel, a B channel and a Gb channel.
Specifically, table 1 lists the current first white balance parameters of each camera module to be tested; table 2 lists the second white balance current parameters (the algorithm is consistent with the platform) of each camera module to be tested after the automatic white balance adjustment. The white balance standard parameter Golden value of the standard camera module is 467/G and 521B/G.
TABLE 1
| Serial number | R | G | B | Gr | Gb | R/G | B/G | Gb/Gr |
| 1 | 235 | 488 | 262 | 488 | 489 | 493 | 550 | 1026 |
| 2 | 236 | 492 | 260 | 491 | 493 | 492 | 542 | 1028 |
| 3 | 239 | 499 | 264 | 499 | 499 | 490 | 542 | 1024 |
| 4 | 231 | 491 | 259 | 491 | 491 | 482 | 540 | 1024 |
| 5 | 230 | 486 | 259 | 486 | 486 | 485 | 546 | 1024 |
TABLE 2
| Serial number | R | G | B | Gr | Gb | R/G | B/G | Gb/Gr |
| 1 | 235 | 513 | 261 | 513 | 514 | 469 | 521 | 1026 |
| 2 | 237 | 517 | 263 | 516 | 518 | 470 | 522 | 1028 |
| 3 | 239 | 523 | 266 | 523 | 523 | 468 | 521 | 1024 |
| 4 | 232 | 506 | 259 | 506 | 507 | 470 | 524 | 1026 |
| 5 | 232 | 507 | 258 | 507 | 507 | 469 | 521 | 1024 |
It is apparent from tables 1 and 2 that the sensor gain of the sensor chip of the camera module to be tested is changed after the automatic white balance adjustment, so as to cause the brightness change, and the R/G and B/G are substantially consistent. In this case, the 360-degree panoramic lens can be formed by selecting the camera modules to be tested, which have the difference between the current parameters of the second white balance within the set range, and pairing the two camera modules to be tested in pairs only by considering the difference of the brightness.
Based on the same inventive concept, the embodiment of the present invention further provides a panoramic lens, wherein the panoramic lens is formed by matching the matching method provided by the embodiment of the present invention, and as the problem solving principle of the panoramic lens is similar to the matching method of the panoramic lens, the implementation of the panoramic lens can refer to the implementation of the matching method of the panoramic lens, and repeated details are not repeated.
The panoramic lens pairing method and the panoramic lens provided by the embodiment of the invention comprise the following steps: the method comprises the steps that a plurality of camera modules to be tested shoot a first picture, and first white balance current parameters of the camera modules to be tested are obtained; automatically adjusting the white balance of each camera module to be tested according to each first white balance current parameter and the white balance standard parameter of the standard camera module; after automatic white balance adjustment, each camera module to be tested shoots a second picture, and a second white balance current parameter of each camera module to be tested is obtained; selecting the camera modules to be tested with the difference between the current parameters of the second white balance within the set range, and pairing the two camera modules to be tested. The invention carries out automatic white balance adjustment on each camera module to be tested, can change the gain of each channel to enable the self white balance parameter to be closer to the white balance standard parameter, restores the color consistency of the modules, pairs of the selected camera modules to be tested with the same or similar second white balance current parameter to form a panoramic lens, and can ensure the brightness consistency or the smaller deviation of the two modules.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The method for pairing the panoramic lens and the panoramic lens provided by the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (4)
1. A panoramic lens pairing method is characterized by comprising the following steps:
the method comprises the steps that a plurality of camera modules to be tested shoot a first picture, and the average value of a red channel, the average value of a green channel and the average value of a blue channel in the central area of the first picture are calculated; calculating the ratio of the red channel average value to the green channel average value and the ratio of the blue channel average value to the green channel average value according to the red channel average value, the green channel average value and the blue channel average value in the first picture center area so as to obtain a first white balance current parameter of each camera module to be tested;
according to a red channel average value, a green channel average value and a blue channel average value in a picture center area shot by a standard camera module, calculating a ratio of the red channel average value to the green channel average value and a ratio of the blue channel average value to the green channel average value to obtain a white balance standard parameter of the standard camera module;
comparing the current white balance parameters with the standard white balance parameters of the standard camera module to obtain corresponding compensation data, and performing automatic white balance adjustment on the camera module to be detected according to the compensation data;
each camera module to be tested shoots a second picture after automatic white balance adjustment, and the average value of a red channel, the average value of a green channel and the average value of a blue channel in the central area of the second picture are calculated; calculating the ratio of the red channel average value to the green channel average value and the ratio of the blue channel average value to the green channel average value according to the red channel average value, the green channel average value and the blue channel average value in the second picture center area to obtain a second white balance current parameter of each camera module to be tested;
and selecting the camera modules to be tested, of which the difference between the current parameters of the second white balance is within a set range, and pairing the camera modules to be tested pairwise.
2. The method for pairing panoramic lenses according to claim 1, wherein the shooting of the first picture by the plurality of camera modules to be tested specifically comprises:
within a set exposure time, a plurality of camera modules to be tested shoot a first picture; the central brightness of the first picture meets a set brightness range.
3. The method for pairing panoramic lenses according to claim 1 or 2, wherein the camera module to be tested and the standard camera module are both modules arranged in a color filter matrix.
4. A panoramic lens, characterized in that the panoramic lens is paired by the pairing method according to any one of claims 1 to 3.
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| WO2020252739A1 (en) * | 2019-06-20 | 2020-12-24 | 深圳市大疆创新科技有限公司 | Method and apparatus for acquiring gain coefficient |
| WO2021223185A1 (en) * | 2020-05-07 | 2021-11-11 | 深圳市大疆创新科技有限公司 | Camera and alignment method and apparatus therefor, and gimbal |
| CN113132694B (en) * | 2021-04-19 | 2022-05-31 | 北京理工大学 | Colourity-based color consistency correction method for multi-camera lens of colour camera |
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