CN106973242A - A kind of light source compensating method of camera module - Google Patents
A kind of light source compensating method of camera module Download PDFInfo
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- CN106973242A CN106973242A CN201710344021.9A CN201710344021A CN106973242A CN 106973242 A CN106973242 A CN 106973242A CN 201710344021 A CN201710344021 A CN 201710344021A CN 106973242 A CN106973242 A CN 106973242A
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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
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/72—Combination of two or more compensation controls
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
-
- 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
Abstract
A kind of light source compensating method of camera module disclosed by the invention includes：The the first white balance underlying parameter and the second white balance underlying parameter of test camera module are obtained under standard sources；The the first white balance parameter current and the second white balance parameter current of test camera module are obtained under ordinary light source；According to the first white balance underlying parameter, the first white balance parameter current, the first coefficient of light source of ordinary light source is obtained；According to the second white balance underlying parameter, the second white balance parameter current, the secondary light source coefficient of ordinary light source is obtained；The 3rd white balance parameter current and the 4th white balance parameter current of regular camera module are obtained under ordinary light source；According to the 3rd white balance parameter current, the first coefficient of light source, the correction value of the 3rd white balance parameter current is obtained；According to the 4th white balance parameter current, secondary light source coefficient, the correction value of the 4th white balance parameter current is obtained.Camera module white balance parameter is set to keep stable and accurate.
Description
Technical field
The present invention relates to camera module technical field, more specifically, more particularly to a kind of light source of camera module
Compensation method.
Background technology
With the continuous quickening of rhythm of life, the various electronic equipments for possessing camera function pour in the daily of people
In life and work, and requirement of the people to picture quality also more and more higher.
Due to the color consistency problem of element sensor, the only parameter by a set of fixation is difficult to make all shooting head moulds
Group reaches good effect, it is therefore desirable to which single camera module is corrected, and the parameters such as color, white balance are burned onto
In camera module.
Also, the parameter of burning is that the data obtained under specific light source are calculated, therefore light source is directly determined
Whether the parameter of burning is correct, and colour temperature, chromaticity coordinates are the important parameters of light source, directly affect the white balance burning of camera module
Record parameter.
When same light source in use for some time, the characteristic such as colour temperature, chromaticity coordinates can change, between different light sources
Difference be even more to avoid, then also just illustrate same camera module different light sources or different time obtain it is white flat
The parameter that weighs is different, also results in the unstable and inaccurate of programming parameters.
The content of the invention
To solve the above problems, the invention provides a kind of light source compensating method of camera module, solving existing skill
Problem present in art, makes camera module keep steady in different light sources or the white balance parameter of same light source different time burning
It is fixed and accurate.
To achieve the above object, the present invention provides following technical scheme：
A kind of light source compensating method of camera module, the light source compensating method includes：
Selection standard light source；
The the first white balance underlying parameter and the second white balance of test camera module are obtained under the standard sources
Underlying parameter；
The the first white balance parameter current and the second white balance of the test camera module are obtained under ordinary light source
Parameter current；
According to the first white balance underlying parameter and the first white balance parameter current, the ordinary light source is obtained
The first coefficient of light source；
According to the second white balance underlying parameter and the second white balance parameter current, the ordinary light source is obtained
Secondary light source coefficient；
The 3rd white balance parameter current and the 4th white balance of regular camera module are obtained under the ordinary light source
Parameter current；
According to the 3rd white balance parameter current and first coefficient of light source, the 3rd white balance is obtained current
The correction value of parameter；
According to the 4th white balance parameter current and the secondary light source coefficient, the 4th white balance is obtained current
The correction value of parameter；
The correction value of the 3rd white balance parameter current and the correction value of the 4th white balance parameter current are burnt
Record is into the regular camera module.
It is preferred that, in above-mentioned light source compensating method, the selection standard light source includes：
Choose multiple light sources；
The chromaticity coordinates of the multiple light source is averaged；
Choose the chromaticity coordinates light source minimum with the mean deviation and be used as standard sources.
It is preferred that, in above-mentioned light source compensating method, described obtained under the standard sources tests camera module
First white balance underlying parameter and the second white balance underlying parameter include：
The test camera module obtains the first picture under the standard sources；
Calculate in the first picture setting regions feux rouges average, green glow average and blue light average a little；
According to the feux rouges average and the blue light average, the ratio of the feux rouges average and the blue light average is calculated
Value, to obtain the first white balance underlying parameter；
According to the green glow average and the blue light average, the ratio of the green glow average and the blue light average is calculated
Value, to obtain the second white balance underlying parameter.
It is preferred that, it is described to obtain under ordinary light source the test camera module in above-mentioned light source compensating method
First white balance parameter current and the second white balance parameter current include：
The test camera module obtains the second picture under the ordinary light source；
Calculate in the second picture setting regions feux rouges average, green glow average and blue light average a little；
According to the feux rouges average and the blue light average, the ratio of the feux rouges average and the blue light average is calculated
Value, to obtain the first white balance parameter current；
According to the green glow average and the blue light average, the ratio of the green glow average and the blue light average is calculated
Value, to obtain the second white balance parameter current.
It is preferred that, it is described according to the first white balance underlying parameter and described in above-mentioned light source compensating method
One white balance parameter current, obtaining the first coefficient of light source of the ordinary light source includes：
The ratio of the first white balance underlying parameter and the first white balance parameter current is calculated, to obtain described
One coefficient of light source.
It is preferred that, it is described according to the second white balance underlying parameter and described in above-mentioned light source compensating method
Two white balance parameter currents, obtaining the secondary light source coefficient of the ordinary light source includes：
The ratio of the second white balance underlying parameter and the second white balance parameter current is calculated, to obtain described
Two coefficient of light source.
It is preferred that, it is described that regular camera module is obtained under the ordinary light source in above-mentioned light source compensating method
3rd white balance parameter current and the 4th white balance parameter current include：
The regular camera module obtains the 3rd picture under the ordinary light source；
Calculate in the 3rd picture setting regions feux rouges average, green glow average and blue light average a little；
According to the feux rouges average and the blue light average, the ratio of the feux rouges average and the blue light average is calculated
Value, to obtain the 3rd white balance parameter current；
According to the green glow average and the blue light average, the ratio of the green glow average and the blue light average is calculated
Value, to obtain the 4th white balance parameter current.
It is preferred that, it is described according to the 3rd white balance parameter current and described in above-mentioned light source compensating method
One coefficient of light source, obtaining the correction value of the 3rd white balance parameter current includes：
The product of the 3rd white balance parameter current and first coefficient of light source is calculated, it is white flat to obtain the described 3rd
The correction value of weighing apparatus parameter current.
It is preferred that, it is described according to the 4th white balance parameter current and described in above-mentioned light source compensating method
Two coefficient of light source, obtaining the correction value of the 4th white balance parameter current includes：
The product of the 4th white balance parameter current and the secondary light source coefficient is calculated, is put down with obtaining the Sibai
The correction value of weighing apparatus parameter current.
By foregoing description, the invention provides a kind of light source compensating method of camera module, the Light Source Compensation
Method using test camera module under standard sources and ordinary light source, obtains the normal light by choosing a standard sources
The coefficient of light source in source；Regular camera module is used, according to the coefficient of light source, routinely to be imaged to this under the ordinary light source afterwards
The white balance parameter of head mould group is modified, and most amendment data recording, into the regular camera module, makes conventional shooting at last
The white balance parameter that head mould group is obtained keeps stable；That is, making regular camera module in different light sources or same light source
The white balance parameter that different time is obtained, and the white balance parameter infinite tendency obtained under standard sources, that is, it ensure that
The stability and accuracy of white balance parameter.
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
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of light source compensating method provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
With reference to Fig. 1, Fig. 1 is a kind of schematic flow sheet of light source compensating method provided in an embodiment of the present invention.
The light source compensating method includes：
S101：Selection standard light source；
Specifically, multiple light sources are chosen first, because the chromaticity coordinates of light source is the important parameter of light source, therefore by many
The chromaticity coordinates of individual light source removes average value, afterwards contrasts the chromaticity coordinates of multiple light sources with average value one by one, finally sits color
The mark light source minimum with mean deviation is used as standard sources.
S102：The first white balance underlying parameter of test camera module is obtained under the standard sources and second white
Balanced basis parameter；
Specifically, being shot using test camera module in the environment of standard sources, first picture is obtained；
Calculate in the first picture setting regions feux rouges average, green glow average and blue light average a little；Example
Such as, points all in the region of the first picture 1/8 are chosen, each point contains feux rouges parameter R, green glow parameter B and blue light
Parameter G, calculate afterwards in 1/8 region feux rouges average, green glow average and blue light average a little；It should be noted that should
The selection of setting regions can also be 1/10, in the present invention and be not construed as limiting, can be according to actual conditions depending on；
According to the feux rouges average and the blue light average, the ratio of the feux rouges average and the blue light average is calculated
Value, to obtain the first white balance underlying parameter；
According to the green glow average and the blue light average, the ratio of the green glow average and the blue light average is calculated
Value, to obtain the second white balance underlying parameter.
S103：The first white balance parameter current of the test camera module is obtained under ordinary light source and second white
Balance parameter current；
Specifically, being shot using test camera module in the environment of ordinary light source, second picture is obtained；
Calculate in the second picture setting regions feux rouges average, green glow average and blue light average a little；Example
Such as, points all in the region of the second picture 1/8 are chosen, each point contains feux rouges parameter R, green glow parameter B and blue light
Parameter G, calculate afterwards in 1/8 region feux rouges average, green glow average and blue light average a little；It should be noted that should
The selection of setting regions can also be 1/10, in the present invention and be not construed as limiting, can be according to actual conditions depending on；
According to the feux rouges average and the blue light average, the ratio of the feux rouges average and the blue light average is calculated
Value, to obtain the first white balance parameter current；
According to the green glow average and the blue light average, the ratio of the green glow average and the blue light average is calculated
Value, to obtain the second white balance parameter current.
S104：According to the first white balance underlying parameter and the first white balance parameter current, obtain described general
First coefficient of light source in thang-kng source；
Specifically, read the first white balance underlying parameter and the first white balance parameter current, according to described the
One white balance underlying parameter and the first white balance parameter current, calculate the first white balance underlying parameter and described first
The ratio of white balance parameter current, is used as the first coefficient of light source of the ordinary light source.
S105：According to the second white balance underlying parameter and the second white balance parameter current, obtain described general
The secondary light source coefficient in thang-kng source；
Specifically, the second white balance underlying parameter and the second white balance parameter current are read, according to described
Second white balance underlying parameter and the second white balance parameter current, calculate the second white balance underlying parameter with it is described
The ratio of second white balance parameter current, is used as the secondary light source coefficient of the ordinary light source.
S106：The 3rd white balance parameter current and Sibai of regular camera module are obtained under the ordinary light source
Balance parameter current；
Specifically, being shot using regular camera module in the environment of ordinary light source, the 3rd picture is obtained；
Calculate in the 3rd picture setting regions feux rouges average, green glow average and blue light average a little；Example
Such as, points all in the region of the 3rd picture 1/8 are chosen, each point contains feux rouges parameter R, green glow parameter B and blue light
Parameter G, calculate afterwards in 1/8 region feux rouges average, green glow average and blue light average a little；It should be noted that should
The selection of setting regions can also be 1/10, in the present invention and be not construed as limiting, can be according to actual conditions depending on；
According to the feux rouges average and the blue light average, the ratio of the feux rouges average and the blue light average is calculated
Value, to obtain the 3rd white balance parameter current；
According to the green glow average and the blue light average, the ratio of the green glow average and the blue light average is calculated
Value, to obtain the 4th white balance parameter current.
S107：According to the 3rd white balance parameter current and first coefficient of light source, the described 3rd is obtained white flat
The correction value of weighing apparatus parameter current；
Specifically, reading the 3rd white balance parameter current and first coefficient of light source, the described 3rd is calculated white
The product of parameter current and first coefficient of light source is balanced, the correction value of the 3rd white balance parameter current is used as.
S108：According to the 4th white balance parameter current and the secondary light source coefficient, obtain the Sibai and put down
The correction value of weighing apparatus parameter current；
Specifically, reading the 4th white balance parameter current and the secondary light source coefficient, the Sibai is calculated
The product of parameter current and the secondary light source coefficient is balanced, the correction value of the 4th white balance parameter current is used as.
Step S107 and step S108 by using the ordinary light source obtained under the combination of standard sources light source system
Number, is modified to white balance parameter of the regular camera under ordinary light source.
S109：By the amendment of the correction value of the 3rd white balance parameter current and the 4th white balance parameter current
Value is burned onto in the regular camera module；
The most amendment of the correction value of the 3rd white balance parameter current and the 4th white balance parameter current at last
Value is burned onto in the regular camera module, regular camera module is not obtained in the same time in different light sources or same light source
White balance parameter keep stable.
By foregoing description, a kind of light source compensating method that the present invention is provided is solved in the prior art, same
Camera module is different in the white balance parameter that different light sources or different time are obtained, and also results in the shakiness of programming parameters
Fixed and inaccurate the problem of；By the coefficient of light source according to the ordinary light source obtained under the combination of standard sources, to routine
White balance parameter of the camera under ordinary light source is modified, make regular camera module in different light sources or same light source not
The white balance parameter obtained with the time, and the white balance parameter infinite tendency obtained under standard sources, that is, it ensure that white
The stability and accuracy of balance parameters.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (9)
1. a kind of light source compensating method of camera module, it is characterised in that the light source compensating method includes：
Selection standard light source；
The first white balance underlying parameter and the second white balance basis of test camera module are obtained under the standard sources
Parameter；
The the first white balance parameter current and the second white balance that the test camera module is obtained under ordinary light source are current
Parameter；
According to the first white balance underlying parameter and the first white balance parameter current, the of the ordinary light source is obtained
One coefficient of light source；
According to the second white balance underlying parameter and the second white balance parameter current, the of the ordinary light source is obtained
Two coefficient of light source；
The 3rd white balance parameter current and the 4th white balance that regular camera module is obtained under the ordinary light source are current
Parameter；
According to the 3rd white balance parameter current and first coefficient of light source, the 3rd white balance parameter current is obtained
Correction value；
According to the 4th white balance parameter current and the secondary light source coefficient, the 4th white balance parameter current is obtained
Correction value；
The correction value of the correction value of the 3rd white balance parameter current and the 4th white balance parameter current is burned onto
In the regular camera module.
2. light source compensating method according to claim 1, it is characterised in that the selection standard light source includes：
Choose multiple light sources；
The chromaticity coordinates of the multiple light source is averaged；
Choose the chromaticity coordinates light source minimum with the mean deviation and be used as standard sources.
3. light source compensating method according to claim 1, it is characterised in that described that test is obtained under the standard sources
The the first white balance underlying parameter and the second white balance underlying parameter of camera module include：
The test camera module obtains the first picture under the standard sources；
Calculate in the first picture setting regions feux rouges average, green glow average and blue light average a little；
According to the feux rouges average and the blue light average, the ratio of the feux rouges average and the blue light average is calculated, with
Obtain the first white balance underlying parameter；
According to the green glow average and the blue light average, the ratio of the green glow average and the blue light average is calculated, with
Obtain the second white balance underlying parameter.
4. light source compensating method according to claim 1, it is characterised in that described that the test is obtained under ordinary light source
The the first white balance parameter current and the second white balance parameter current of camera module include：
The test camera module obtains the second picture under the ordinary light source；
Calculate in the second picture setting regions feux rouges average, green glow average and blue light average a little；
According to the feux rouges average and the blue light average, the ratio of the feux rouges average and the blue light average is calculated, with
Obtain the first white balance parameter current；
According to the green glow average and the blue light average, the ratio of the green glow average and the blue light average is calculated, with
Obtain the second white balance parameter current.
5. light source compensating method according to claim 1, it is characterised in that described to join according to first white balance basis
Several and described first white balance parameter current, obtaining the first coefficient of light source of the ordinary light source includes：
The ratio of the first white balance underlying parameter and the first white balance parameter current is calculated, to obtain first light
Source coefficient.
6. light source compensating method according to claim 1, it is characterised in that described to join according to second white balance basis
Several and described second white balance parameter current, obtaining the secondary light source coefficient of the ordinary light source includes：
The ratio of the second white balance underlying parameter and the second white balance parameter current is calculated, to obtain second light
Source coefficient.
7. light source compensating method according to claim 1, it is characterised in that described to obtain conventional under the ordinary light source
3rd white balance parameter current of camera module and the 4th white balance parameter current include：
The regular camera module obtains the 3rd picture under the ordinary light source；
Calculate in the 3rd picture setting regions feux rouges average, green glow average and blue light average a little；
According to the feux rouges average and the blue light average, the ratio of the feux rouges average and the blue light average is calculated, with
Obtain the 3rd white balance parameter current；
According to the green glow average and the blue light average, the ratio of the green glow average and the blue light average is calculated, with
Obtain the 4th white balance parameter current.
8. light source compensating method according to claim 1, it is characterised in that described currently to join according to the 3rd white balance
Several and described first coefficient of light source, obtaining the correction value of the 3rd white balance parameter current includes：
The product of the 3rd white balance parameter current and first coefficient of light source is calculated, is worked as with obtaining the 3rd white balance
The correction value of preceding parameter.
9. light source compensating method according to claim 1, it is characterised in that described currently to join according to the 4th white balance
Several and described secondary light source coefficient, obtaining the correction value of the 4th white balance parameter current includes：
The product of the 4th white balance parameter current and the secondary light source coefficient is calculated, is worked as with obtaining the 4th white balance
The correction value of preceding parameter.
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| 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 |
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Application publication date: 20170721 |