CN106973279A - A kind of camera module white balance debugging method and device - Google Patents
A kind of camera module white balance debugging method and device Download PDFInfo
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- CN106973279A CN106973279A CN201710384435.4A CN201710384435A CN106973279A CN 106973279 A CN106973279 A CN 106973279A CN 201710384435 A CN201710384435 A CN 201710384435A CN 106973279 A CN106973279 A CN 106973279A
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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
- H04N23/84—Camera processing pipelines; Components thereof for processing colour signals
- H04N23/88—Camera processing pipelines; Components thereof for processing colour signals for colour balance, e.g. white-balance circuits or colour temperature control
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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
- H04N23/10—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from different wavelengths
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Abstract
The invention discloses a kind of camera module white balance debugging method and device, method includes：Same Scene is shot with each camera module respectively, the image that each camera module is photographed accordingly is obtained；The overlapping region of two images is obtained, and on the basis of the primary color values ratio of white portion in wherein piece image overlapping region, calculates the offset of the primary color values ratio of white portion in another width picture registration region；By offset compensation into the white balance processing parameter of camera module, to carry out white balance processing to shooting image.Camera module white balance debugging method and device of the present invention, by the overlapping region for obtaining two camera module shooting images, based on the white portion in overlapping region, calculate the offset of image primary color values ratio, the offset of acquisition is compensated into the white balance processing parameter of camera module, by that to camera module white balance debugging, each camera module can be reduced and shoot the heterochromia existed between the image obtained.
Description
Technical field
The present invention relates to technical field of image processing, more particularly to a kind of camera module white balance debugging method and dress
Put.
Background technology
In the prior art, the picture pick-up device big for shooting field range, usually using two camera module compositions, shoots
The two images that synchronization is photographed are spliced into piece image afterwards.Such as panorama camera, is carried out using two fish eye lenses
Shoot, by the image mosaic for arriving two lens shootings, 360 degree of panoramic pictures can be obtained.
But in actual applications, because the devices such as camera lens, the sensitive chip of two camera modules have differences, two camera modules
The image of shooting is each after white balance is handled, and the color of obtained two images can have differences, and this directly affects splicing
Image effect afterwards, such as occur that image color transition is uneven, there is obvious line of demarcation or correction color transition causes
Color distortion the problems such as.
The content of the invention
In consideration of it, it is an object of the invention to provide a kind of camera module white balance debugging method and device, it is possible to decrease respectively take the photograph
The heterochromia that exists between the image shot as module.
To achieve the above object, the present invention provides following technical scheme：
A kind of camera module white balance debugging method, including：
Same Scene is shot with each camera module respectively, the image that each camera module is photographed accordingly is obtained；
The overlapping region of two images is obtained, and with the primary color values ratio of white portion in wherein piece image overlapping region
On the basis of, calculate the offset of the primary color values ratio of white portion in another width picture registration region；
By offset compensation into the white balance processing parameter of camera module, to be carried out to shooting image at white balance
Reason.
Alternatively, the overlapping region for obtaining two images, and with white portion in wherein piece image overlapping region
Primary color values ratio on the basis of, calculating the offset of the primary color values ratio of white portion in another width picture registration region includes：
Calculate the overlapping region of two images；
Respectively in each width image, the primary color values ratio to any one primary color component in the white portion of overlapping region is calculated
Value；
On the basis of the primary color values ratio of wherein piece image, the offset of the primary color values ratio of another piece image is calculated.
Alternatively, the primary color values ratio includes R/G values and B/G values, or the primary color values ratio includes R/B values and G/
B values, or the primary color values ratio include B/R values and G/R values, and wherein R represents red value, and G represents green value, and B represents blueness
Value.
Alternatively, the offset for the first image primary color values ratio and the second image primary color values ratio ratio,
Wherein, on the basis of the primary color values ratio of white portion in described first image overlapping region.
Alternatively, the offset includes：R_Ratio=RG0/RG1, B_Ratio=BG0/BG1, wherein, R_Ratio
Red color components offset is represented, B_Ratio represents blue component offset, and RG0 represents white area in the first picture registration region
The R/G values in domain, BG0 represents the B/G values of white portion in the first picture registration region, and RG1 is represented in the second picture registration region
The R/G values of white portion, BG1 represents the B/G values of white portion in the second picture registration region；
Or, the offset includes：R_Ratio=RB0/RB1, G_Ratio=GB0/GB1, wherein, R_Ratio tables
Show red color components offset, G_Ratio represents green components offset, and RB0 represents white portion in the first picture registration region
R/B values, GB0 represents the G/B values of white portion in the first picture registration region, and RB1 represents white in the second picture registration region
The R/B values in color region, GB1 represents the G/B values of white portion in the second picture registration region；
Or, the offset includes：B_Ratio=BR0/BR1, G_Ratio=GR0/GR1, wherein, B_Ratio tables
Show blue component offset, G_Ratio represents green components offset, and BR0 represents white portion in the first picture registration region
B/R values, GR0 represents the G/R values of white portion in the first picture registration region, and BR1 represents white in the second picture registration region
The B/R values in color region, GR1 represents the G/R values of white portion in the second picture registration region.
Alternatively, it is described to compensate the offset into the white balance processing parameter of camera module, shooting image is entered
The processing of row white balance includes：
The offset is converted, the gain that the value after conversion is written into camera module sensitive chip controls to deposit
In device or in image signal processing blocks.
A kind of camera module white balance debugging device, including：
Computing module, for shooting Same Scene respectively with each camera module, accordingly obtains each camera module and photographs
Image after, the overlapping region of two images is obtained, and with the primary color values ratio of white portion in wherein piece image overlapping region
On the basis of value, the offset of the primary color values ratio of white portion in another width picture registration region is calculated；
Setup module, for the offset to be compensated into the white balance processing parameter of camera module, with to shooting figure
As carrying out white balance processing.
As shown from the above technical solution, camera module white balance debugging method and device provided by the present invention, respectively with
Each camera module shoots Same Scene, accordingly obtains the image that each camera module is photographed, and then obtains the coincidence of two images
Region, on the basis of the primary color values ratio of white portion in wherein piece image overlapping region, calculates another width picture registration area
The offset of the primary color values ratio of white portion in domain, the white balance processing parameter to camera module is compensated by the offset
In, white balance processing is carried out to shooting image.
Camera module white balance debugging method and device of the present invention, by the coincidence area for obtaining two camera module shooting images
Domain, based on the white portion in overlapping region, on the basis of the primary color values ratio of wherein piece image, calculates another piece image base
The offset of colour ratio, the offset of acquisition is compensated into the white balance processing parameter of camera module, shooting image is entered
The processing of row white balance, by this method, can reduce each camera module and shoot the heterochromia existed between the image obtained.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of flow chart of camera module white balance debugging method provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of camera module white balance debugging device provided in an embodiment of the present invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, should all belong to protection of the present invention
Scope.
A kind of camera module white balance debugging method provided in an embodiment of the present invention, including：
Same Scene is shot with each camera module respectively, the image that each camera module is photographed accordingly is obtained；
The overlapping region of two images is obtained, and with the primary color values ratio of white portion in wherein piece image overlapping region
On the basis of, calculate the offset of the primary color values ratio of white portion in another width picture registration region；
By offset compensation into the white balance processing parameter of camera module, to be carried out to shooting image at white balance
Reason.
The present embodiment camera module white balance debugging method, Same Scene is shot with each camera module, obtains each shooting mould
The image that group is photographed, the then white portion in two images overlapping region, with wherein piece image overlapping region
On the basis of the primary color values ratio of white portion, the compensation of the primary color values ratio of white portion in another width picture registration region is calculated
Value, using this offset as the global compensation value of image, is compensated into the white balance processing parameter of camera module, to shooting image
Carry out white balance processing.By this method, each camera module can be reduced and shoot the heterochromia existed between the image obtained, can
To improve the image effect of image after splicing.
The present embodiment camera module white balance debugging method is elaborated below.
Fig. 1 is refer to, the camera module white balance debugging method that the present embodiment is provided includes step：
S10：Same Scene is shot with each camera module respectively, the image that each camera module is photographed accordingly is obtained.
Such as, for two camera modules set in equipment, Same Scene is shot with each camera module respectively, accordingly obtained
Obtain the image each photographed.
S11：The overlapping region of two images is obtained, and with the primary color values of white portion in wherein piece image overlapping region
On the basis of ratio, the offset of the primary color values ratio of white portion in another width picture registration region is calculated.
In this step, the overlapping region of two images is calculated first.
Then, respectively in each width image, the base to any one primary color component in the white portion of overlapping region is calculated
Colour ratio.
Specifically, can be for green primary color values ratio, including R/G values and B/G values.Or can be for blueness
Primary color values ratio, primary color values ratio include R/B values and G/B values.Or can be for red primary color values ratio, primary color values
Ratio includes B/R values and G/R values, and wherein R represents red value, and G represents green value, and B represents blue valve.
Finally, on the basis of the primary color values ratio of wherein piece image, the benefit of the primary color values ratio of another piece image is calculated
Repay value.
In specific the present embodiment method, the offset is the primary color values ratio of the first image and the primary color values of the second image
The ratio of ratio, wherein, on the basis of the primary color values ratio of white portion in described first image overlapping region.
Specifically, the offset includes：R_Ratio=RG0/RG1, B_Ratio=BG0/BG1, wherein, R_Ratio
Red color components offset is represented, B_Ratio represents blue component offset, and RG0 represents white area in the first picture registration region
The R/G values in domain, BG0 represents the B/G values of white portion in the first picture registration region, and RG1 is represented in the second picture registration region
The R/G values of white portion, BG1 represents the B/G values of white portion in the second picture registration region；
Or, the offset includes：R_Ratio=RB0/RB1, G_Ratio=GB0/GB1, wherein, R_Ratio tables
Show red color components offset, G_Ratio represents green components offset, and RB0 represents white portion in the first picture registration region
R/B values, GB0 represents the G/B values of white portion in the first picture registration region, and RB1 represents white in the second picture registration region
The R/B values in color region, GB1 represents the G/B values of white portion in the second picture registration region；
Or, the offset includes：B_Ratio=BR0/BR1, G_Ratio=GR0/GR1, wherein, B_Ratio tables
Show blue component offset, G_Ratio represents green components offset, and BR0 represents white portion in the first picture registration region
B/R values, GR0 represents the G/R values of white portion in the first picture registration region, and BR1 represents white in the second picture registration region
The B/R values in color region, GR1 represents the G/R values of white portion in the second picture registration region.
For example, photographing image, respectively the first image and the second image with two camera modules.Wherein, the first image weight
The RGB color value of white portion is respectively in conjunction region：R0=101.5, G0=98.5, B0=91.5；Second picture registration region
The RGB color value of middle white portion is respectively：R1=99, G1=99, B1=91.
The primary color values ratio to green primary of white portion in two images overlapping region is calculated respectively：In the first image
In, RG0=R0/G0=1.03, BG0=B0/G0=0.93；In the second image, RG1=R1/G1=1.0, BG1=B1/G1
=0.92.
On the basis of the primary color values ratio of white portion in the first picture registration region, the primary color values ratio of the second image is calculated
The offset of value, be specially：R_Ratio=RG0/RG1=1.03, B_Ratio=BG0/BG1=1.01.Therefore taken the photograph to second
The offset of the red channel of picture module is 1.03, and the offset to blue channel is 1.01.
S12：By offset compensation into the white balance processing parameter of camera module, to be put down in vain to shooting image
Weighing apparatus processing.
Specifically, the offset is converted, the value after conversion is written to the gain of camera module sensitive chip
In control register or in image signal processing blocks.Gain control register or image signal processing blocks pass through adjustment
Red color components R, green components G, blue component B gain, control the magnification ratio of these three passages to reach balance.
On the basis of the first camera module, then after the offset conversion obtained calculating, it is written to be debugged second and takes the photograph
In the gain control register of picture module sensitive chip, or it is written in image signal processing blocks.Make the first camera module
With the second camera module in shooting image, white balance processing is carried out to shooting image with the white balance processing parameter after debugging.
Accordingly, Fig. 2 is refer to, the embodiment of the present invention also provides a kind of camera module white balance debugging method, including：
Computing module 20, for shooting Same Scene respectively with each camera module, accordingly obtains each camera module and shoots
After the image arrived, the overlapping region of two images is obtained, and with the primary color values of white portion in wherein piece image overlapping region
On the basis of ratio, the offset of the primary color values ratio of white portion in another width picture registration region is calculated；
Setup module 21, for the offset to be compensated into the white balance processing parameter of camera module, with to shooting
Image carries out white balance processing.
The present embodiment camera module white balance debugging device, Same Scene is shot in each camera module, obtains each shooting mould
After the image that group is photographed, the overlapping region of two images is obtained, with the base of white portion in wherein piece image overlapping region
On the basis of colour ratio, the offset of the primary color values ratio of white portion in another width picture registration region is calculated, then will be described
Offset is compensated into the white balance processing parameter of camera module, and white balance processing is carried out to shooting image.
The present embodiment camera module white balance debugging device, by obtaining the overlapping region of two camera module shooting images,
Based on the white portion in overlapping region, on the basis of the primary color values ratio of wherein piece image, another piece image primary colours are calculated
It is worth the offset of ratio, the offset of acquisition is compensated into the white balance processing parameter of camera module, shooting image is carried out
White balance processing, by camera module white balance debugging, existing between the image that each camera module shooting acquisition can be reduced
Heterochromia, can improve the image effect of image after splicing.
It is further to note that in the present embodiment device, each module can be joined respectively to the respective handling method of data
Examine the content described in above-described embodiment camera module white balance debugging method.
A kind of camera module white balance debugging method and device provided by the present invention is described in detail above.This
Apply specific case in text to be set forth the principle and embodiment of the present invention, the explanation of above example is only intended to
Help to understand method and its core concept of the invention.It should be pointed out that for those skilled in the art,
Without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls
Enter in the protection domain of the claims in the present invention.
Claims (7)
1. a kind of camera module white balance debugging method, it is characterised in that including：
Same Scene is shot with each camera module respectively, the image that each camera module is photographed accordingly is obtained；
The overlapping region of two images is obtained, and using the primary color values ratio of white portion in wherein piece image overlapping region as base
Standard, calculates the offset of the primary color values ratio of white portion in another width picture registration region；
By offset compensation into the white balance processing parameter of camera module, to carry out white balance processing to shooting image.
2. camera module white balance debugging method according to claim 1, it is characterised in that the acquisition two images
Overlapping region, and on the basis of the primary color values ratio of white portion in wherein piece image overlapping region, calculate another piece image
The offset of the primary color values ratio of white portion includes in overlapping region：
Calculate the overlapping region of two images；
Respectively in each width image, the primary color values ratio to any one primary color component in the white portion of overlapping region is calculated；
On the basis of the primary color values ratio of wherein piece image, the offset of the primary color values ratio of another piece image is calculated.
3. camera module white balance debugging method according to claim 2, it is characterised in that the primary color values ratio includes
R/G values and B/G values, either the primary color values ratio include R/B values and G/B values or the primary color values ratio including B/R values with
G/R values, wherein R represent red value, and G represents green value, and B represents blue valve.
4. camera module white balance debugging method according to claim 1, it is characterised in that the offset is the first figure
The ratio of the primary color values ratio of picture and the primary color values ratio of the second image, wherein, with white in described first image overlapping region
On the basis of the primary color values ratio in region.
5. camera module white balance debugging method according to claim 4, it is characterised in that the offset includes：R_
Ratio=RG0/RG1, B_Ratio=BG0/BG1, wherein, R_Ratio represents red color components offset, and B_Ratio represents blue
Color composition offset, RG0 represents the R/G values of white portion in the first picture registration region, and BG0 represents the first picture registration region
The B/G values of middle white portion, RG1 represents the R/G values of white portion in the second picture registration region, and BG1 represents the second image weight
Close the B/G values of white portion in region；
Or, the offset includes：R_Ratio=RB0/RB1, G_Ratio=GB0/GB1, wherein, R_Ratio represents red
Color composition offset, G_Ratio represents green components offset, and RB0 represents the R/B of white portion in the first picture registration region
Value, GB0 represents the G/B values of white portion in the first picture registration region, and RB1 represents white portion in the second picture registration region
R/B values, GB1 represents the G/B values of white portion in the second picture registration region；
Or, the offset includes：B_Ratio=BR0/BR1, G_Ratio=GR0/GR1, wherein, B_Ratio represents blue
Color composition offset, G_Ratio represents green components offset, and BR0 represents the B/R of white portion in the first picture registration region
Value, GR0 represents the G/R values of white portion in the first picture registration region, and BR1 represents white portion in the second picture registration region
B/R values, GR1 represents the G/R values of white portion in the second picture registration region；
Wherein R represents red value, and G represents green value, and B represents blue valve.
6. camera module white balance debugging method according to claim 1, it is characterised in that described by the compensation value complement
Repay in the white balance processing parameter of camera module, white balance processing is carried out to shooting image to be included：
The offset is converted, the value after conversion is written in the gain control register of camera module sensitive chip
Or in image signal processing blocks.
7. a kind of camera module white balance debugging device, it is characterised in that including：
Computing module, for shooting Same Scene respectively with each camera module, accordingly obtains the figure that each camera module is photographed
As after, obtain two images overlapping region, and using the primary color values ratio of white portion in wherein piece image overlapping region as
Benchmark, calculates the offset of the primary color values ratio of white portion in another width picture registration region；
Setup module, for the offset to be compensated into the white balance processing parameter of camera module, to enter to shooting image
The processing of row white balance.
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| CN114040179B (en) * | 2021-10-20 | 2023-06-06 | 重庆紫光华山智安科技有限公司 | Image processing method and device |
| CN114071109A (en) * | 2021-11-19 | 2022-02-18 | 信利光电股份有限公司 | Method for improving instability of white balance and camera module |
| CN114071109B (en) * | 2021-11-19 | 2024-04-12 | 信利光电股份有限公司 | Method for improving white balance instability and camera module |
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Application publication date: 20170721 |