CN112600991A - Method for solving high-magnification monochromatic color cast of variable-magnification movement - Google Patents
Method for solving high-magnification monochromatic color cast of variable-magnification movement Download PDFInfo
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- CN112600991A CN112600991A CN202011428873.4A CN202011428873A CN112600991A CN 112600991 A CN112600991 A CN 112600991A CN 202011428873 A CN202011428873 A CN 202011428873A CN 112600991 A CN112600991 A CN 112600991A
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- picture image
- magnification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/2224—Studio circuitry; Studio devices; Studio equipment related to virtual studio applications
- H04N5/2226—Determination of depth image, e.g. for foreground/background separation
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Color Television Image Signal Generators (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
The invention discloses a method for solving the problem of high-magnification monochromatic color cast of a variable-magnification machine core, which comprises the following steps of: s1, shooting a picture image; s2, judging whether the picture image is a non-pure background; s3, if yes, setting the white balance as automatic and obtaining the gain value of each channel of the current picture image RGB, and using the gain value as a reference value; if not, repeating the steps S1 and S2 until the picture image is a non-pure background and obtaining a gain value as a reference value; s4, after obtaining the gain value of the step S3, repeating the steps S1 and S2, when the pure color background is touched, taking the gain value in the step S3 as a fixed value as the required RGB gain value of the current picture image, and performing the color restoration of the picture image. The invention makes the color restoration of the monochromatic scene more real by searching the gain value of the RGB three channels of the picture image as the reference value and substituting the gain value as the reference into the color restoration of the picture image with the pure color background.
Description
Technical Field
The invention relates to the field of image color adjustment, in particular to a method for solving the problem of high-magnification monochromatic color cast of a variable-magnification movement.
Background
In the prior art, the basic principle of the automatic white balance algorithm of the current available core-doubling scheme is as follows: according to the color information of the gray objects in the scene, the gains of the three color channels are calculated R, G, B, and after the gains are multiplied, the three channels of RGB are balanced, so that the white objects can be restored to be normal under different color temperatures. When the color information of a gray object is lacked in a scene and a large-area monochromatic scene is obtained, the real color cannot be restored only by the current automatic white balance algorithm.
Accordingly, the prior art is deficient and needs improvement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method for solving the problem of large-magnification monochromatic color cast of the variable-magnification movement is provided to solve the problem.
The technical scheme of the invention is as follows: a method for solving the problem of large-magnification monochromatic color cast of a variable-magnification movement comprises the following steps:
s1, shooting a picture image;
s2, judging whether the picture image is a non-pure background;
s3, if yes, setting the white balance to be automatic, and obtaining and recording the gain value of each channel of the RGB of the current picture image, and taking the gain value as a reference value;
if not, repeating the steps S1 and S2 until the picture image is a non-pure background and gain value is obtained as a reference value;
s4, after obtaining the gain value of the step S3, repeating the steps S1 and S2, and when the pure color background is touched, taking the gain value in the step S3 as a fixed value to be used as the RGB gain value required by the picture image of the current pure color background, and performing picture image color restoration of the pure color background.
Preferably, in step S1, when the lens is initialized by driving the motor, the screen image is captured while staying at the position of the widest angle.
Preferably, in step S2, the determination of the non-solid background is performed as follows:
s21, acquiring the shot picture image, and dividing the picture image into a plurality of blocks;
s22, calculating the integral average value of RGB three channels in each block;
and S23, comparing and judging whether the overall mean values of all the blocks in the step S22 are different greatly, if so, the picture image is a non-pure background, and if not, the picture image is a pure background.
Preferably, in step S21, the picture image is divided into 64 blocks.
Preferably, each of the 64 blocks is the same size and is divided in an 8 by 8 arrangement.
By adopting the technical schemes, the invention enables the color restoration of a monochromatic scene to be more real by searching the gain value of the RGB three channels of the picture image as the reference value and substituting the gain value as the reference into the color restoration of the picture image with the pure color background.
Drawings
FIG. 1 is a schematic overall flow diagram of the present invention;
fig. 2 is a detailed flowchart of step S2 according to the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
As shown in fig. 1, this embodiment provides a method for solving the problem of large-magnification monochrome color cast of a variable-magnification movement, which includes the following steps:
and S1, shooting the picture image.
And S2, judging whether the picture image is a non-pure background.
And S3, if yes, setting the white balance to be in an automatic state, and acquiring and recording the gain value of each channel of the RGB of the current picture image, and taking the gain value as a reference value.
If not, the steps S1 and S2 are repeated until the picture image is a non-solid background and the gain value is obtained as the reference value.
S4, after obtaining the gain value of the step S3, repeating the steps S1 and S2, and when the pure color background is touched, taking the gain value in the step S3 as a fixed value to be used as the RGB gain value required by the picture image of the current pure color background, and performing picture image color restoration of the pure color background.
In step S1, when the lens is initialized by the driving motor, the screen image is captured while staying at the position of the widest angle. In this state, the captured image has the largest field of view, and the image with the largest field of view has rich frames and rich gray points (white points), and if the image is not at the position of the largest angle, a monochrome scene easily appears, so that white points do not exist in the frames.
As shown in fig. 2, in step S2, the determination of the non-solid background is as follows:
s21, acquiring the shot picture image, and dividing the picture image into a plurality of blocks;
s22, calculating the integral average value of RGB three channels in each block;
and S23, comparing and judging whether the overall mean values of all the blocks in the step S22 are different greatly, if so, the picture image is a non-pure background, and if not, the picture image is a pure background.
In step S21, the picture image is divided into 64 blocks, each block having the same size, and divided in an 8 × 8 arrangement. Of course, other numbers are possible, and selecting 64 blocks is an optimal value because dividing the picture image too little can not distinguish whether it is a solid background, and if it is too much, the amount of calculation is increased. Meanwhile, the sizes of the blocks are required to be the same, so that the difference comparison between the blocks is ensured to be in an average comparison state, and an extreme comparison condition is avoided.
By adopting the technical schemes, the invention enables the color restoration of a monochromatic scene to be more real by searching the gain value of the RGB three channels of the picture image as the reference value and substituting the gain value as the reference into the color restoration of the picture image with the pure color background.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for solving the problem of large-magnification monochromatic color cast of a variable-magnification movement is characterized by comprising the following steps:
s1, shooting a picture image;
s2, judging whether the picture image is a non-pure background;
s3, if yes, setting the white balance to be automatic, and obtaining and recording the gain value of each channel of the RGB of the current picture image, and taking the gain value as a reference value;
if not, repeating the steps S1 and S2 until the picture image is a non-pure background and gain value is obtained as a reference value;
s4, after obtaining the gain value of the step S3, repeating the steps S1 and S2, and when the pure color background is touched, taking the gain value in the step S3 as a fixed value to be used as the RGB gain value required by the picture image of the current pure color background, and performing picture image color restoration of the pure color background.
2. The method for solving the problem of large-magnification monochrome color cast of the zoom lens mechanism according to claim 1, wherein in step S1, the lens is initialized by the driving motor, and the image is captured while staying at the widest angle position.
3. The method for solving the problem of large-magnification monochromatic color cast of the variable-magnification movement according to claim 2, wherein in step S2, the non-pure background is judged as follows:
s21, acquiring the shot picture image, and dividing the picture image into a plurality of blocks;
s22, calculating the integral average value of RGB three channels in each block;
and S23, comparing and judging whether the overall mean values of all the blocks in the step S22 are different greatly, if so, the picture image is a non-pure background, and if not, the picture image is a pure background.
4. The method for solving the problem of large-magnification monochrome color cast of the variable-magnification movement according to claim 3, wherein in step S21, the picture image is divided into 64 blocks.
5. The method for solving the problem of large-magnification monochrome color cast of the variable-magnification cassette mechanism according to claim 4, wherein each of the 64 blocks has the same size and is divided in an 8 x 8 arrangement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011428873.4A CN112600991A (en) | 2020-12-09 | 2020-12-09 | Method for solving high-magnification monochromatic color cast of variable-magnification movement |
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| CN202011428873.4A CN112600991A (en) | 2020-12-09 | 2020-12-09 | Method for solving high-magnification monochromatic color cast of variable-magnification movement |
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| CN112600991A true CN112600991A (en) | 2021-04-02 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103402102A (en) * | 2013-07-17 | 2013-11-20 | 广东欧珀移动通信有限公司 | Double-camera picture pick-up system and white balance adjustment method and device thereof |
| CN108616691A (en) * | 2018-04-28 | 2018-10-02 | 北京小米移动软件有限公司 | Photographic method, device, server based on automatic white balance and storage medium |
| CN108769634A (en) * | 2018-07-06 | 2018-11-06 | Oppo（重庆）智能科技有限公司 | A kind of image processing method, image processing apparatus and terminal device |
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2020
- 2020-12-09 CN CN202011428873.4A patent/CN112600991A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103402102A (en) * | 2013-07-17 | 2013-11-20 | 广东欧珀移动通信有限公司 | Double-camera picture pick-up system and white balance adjustment method and device thereof |
| CN108616691A (en) * | 2018-04-28 | 2018-10-02 | 北京小米移动软件有限公司 | Photographic method, device, server based on automatic white balance and storage medium |
| CN108769634A (en) * | 2018-07-06 | 2018-11-06 | Oppo（重庆）智能科技有限公司 | A kind of image processing method, image processing apparatus and terminal device |
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