CN103634581A - White balance control method, device and electronic equipment - Google Patents
White balance control method, device and electronic equipment Download PDFInfo
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- CN103634581A CN103634581A CN201210300023.5A CN201210300023A CN103634581A CN 103634581 A CN103634581 A CN 103634581A CN 201210300023 A CN201210300023 A CN 201210300023A CN 103634581 A CN103634581 A CN 103634581A
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- colour temperature
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Abstract
An embodiment of the invention discloses a white balance control method applied to electronic equipment at least having an image acquisition module and a sensing module. The method comprises acquiring the color temperature of ambient light by use of the sensing module while acquiring an image by use of the image acquisition module; and adjusting the white balance of the image based on the color temperature of the ambient light. In the white balance control method provided by the application, the color temperature of the ambient light is directly acquired, a reference point of the white balance can be accurately determined through the acquired color temperature, the white balance of the acquired image is thus accurately adjusted and the accuracy of balance white adjustment is improved.
Description
Technical field
The present invention relates to technical field of image processing, more particularly, relate to a kind of method for controlling white balance, device and electronic equipment.
Background technology
In capture apparatus (as digital camera, mobile phone camera etc.), subject is being converted to after picture signal, need to carry out white balance processing to it, thereby make the scenery taken or the portrait etc. can true reappearance actual effect.
But, when the colour cast of large face oneself appears in environment, during as yellow background, red background or blue background, there will be the photo of taking to occur the color of deflection background, white balance cannot be accomplished accurately.
Summary of the invention
The object of this invention is to provide a kind of method for controlling white balance, to solve white balance, cannot accomplish problem accurately.
For achieving the above object, the invention provides following technical scheme:
A method for controlling white balance, is applied to electronic equipment, and described electronic equipment at least has image capture module and sensing module, and described method comprises:
When utilizing described image capture module to gather image, utilize described sensing module to gather the colour temperature of surround lighting;
Colour temperature according to described surround lighting is carried out blank level adjustment to described image.
Said method, preferred, the described colour temperature of utilizing described sensing module to gather surround lighting comprises:
Described sensing module gathers R, G, the B value of surround lighting;
According to described R, G, B value, obtain the colour temperature of described surround lighting.
Said method, preferred, the colour temperature of the described surround lighting of described foundation is carried out blank level adjustment to the image obtaining and is comprised:
According to the colour temperature of described surround lighting, by tabling look-up, obtain the adjustment algorithm corresponding with the colour temperature of described surround lighting;
According to described adjustment algorithm, the three primary colors of described image are adjusted, made the three primary colors ratio of described image reach balance.
Said method, preferred, the colour temperature of the described surround lighting of described foundation is carried out blank level adjustment to the image obtaining and is also comprised:
While there is not adjustment algorithm corresponding to colour temperature with described surround lighting in described table, by default mapping algorithm, the colour temperature of described surround lighting is converted, according to the colour temperature after described conversion, by tabling look-up, obtain the adjustment algorithm corresponding with colour temperature after described conversion;
According to the adjustment algorithm that the colour temperature with after described conversion is corresponding, the three primary colors of described image are adjusted, made the trichromatic ratio of described image reach balance.
A white balance control device, comprising:
Image capture module, for gathering image;
Sensing module, for gathering the colour temperature of surround lighting;
Adjusting module, carries out blank level adjustment for the colour temperature according to described surround lighting to described image.
Said apparatus, preferred, described sensing module comprises:
Collecting unit, for gathering R, G, the B value of described surround lighting;
Acquiring unit, for obtaining the colour temperature of described surround lighting according to described R, G, B value.
Said apparatus, preferred, described detecting unit is three primary colors transducer
Said apparatus, preferred, described adjusting module comprises:
Search unit, for the colour temperature according to described surround lighting, by tabling look-up, obtain the adjustment algorithm corresponding with the colour temperature of described surround lighting;
Adjustment unit, adjusts the three primary colors of described image by default adjustment algorithm for the colour temperature according to described surround lighting, makes the trichromatic ratio of described image reach balance.
Said apparatus, preferred, described adjusting module also comprises:
Converter unit, when there is not adjustment algorithm corresponding to colour temperature with described surround lighting when described table, converts the colour temperature of described surround lighting by default mapping algorithm;
Accordingly, described adjustment unit is also adjusted the three primary colors of described image for adjustment algorithm corresponding to the colour temperature according to after described conversion, makes the trichromatic ratio of described image reach balance.
An electronic equipment, comprises white balance control device as above.
Known by above scheme, a kind of method for controlling white balance that the application provides, directly gathers the colour temperature of surround lighting, by the colour temperature collecting, can accurately determine the datum mark of white balance, and then accurately the image getting is carried out to blank level adjustment, improved the precision of blank level adjustment.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart of a kind of method for controlling white balance that Fig. 1 provides for the embodiment of the present application;
The structural representation of a kind of white balance control device that Fig. 2 provides for the embodiment of the present application;
The structural representation of the another kind of white balance control device that Fig. 3 provides for the embodiment of the present application.
Term " first " in specification and claims and above-mentioned accompanying drawing, " second ", " the 3rd " " 4th " etc. (if existence) are for distinguishing similar part, and needn't be for describing specific order or precedence.The data that should be appreciated that such use suitably can exchanged in situation, so that the application's described herein embodiment can be with the order enforcement except here illustrated.
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The method that the embodiment of the present application provides is applied to electronic equipment, and this electronic equipment at least has image capture module sensing module.
Refer to Fig. 1, the flow chart of a kind of method for controlling white balance that Fig. 1 provides for the embodiment of the present application, comprising:
Step S101: when utilizing described image capture module to gather image, utilize described sensing module to gather the colour temperature of surround lighting.
In this step, described sensing module and described image capture module collaborative work, when the preview of taking pictures (namely gathering image), sensing module gathers the colour temperature of surround lighting; That is to say, in this step, be not after collecting image, judges possible surround lighting colour temperature, but directly gather surround lighting colour temperature according to the image gathering by comparative analysis.
Step S102: the colour temperature according to described surround lighting is carried out blank level adjustment to the image gathering.
The corresponding color temperature value of each surround lighting, different blank level adjustment algorithm corresponding to surround lighting; In this step, by the colour temperature of the surround lighting that collects, determine corresponding blank level adjustment algorithm, and then by definite blank level adjustment algorithm, the image collecting is carried out to blank level adjustment;
In this step, can by (as the table of comparisons of colour temperature with the blank level adjustment algorithm) method of tabling look-up obtain with as described in the corresponding blank level adjustment algorithm of the colour temperature of surround lighting, according to described blank level adjustment algorithm, the three primary colors of the image gathering are carried out to blank level adjustment, make the three primary colors ratio of described image reach balance.
During blank level adjustment algorithm corresponding to the colour temperature of the surround lighting not gathering with described sensing module in the described table of comparisons, also can to the colour temperature of the surround lighting of described collection, convert by default mapping algorithm, according to the colour temperature after described conversion, by tabling look-up, obtain the adjustment algorithm corresponding with colour temperature after described conversion, and according to adjustment algorithm corresponding to the colour temperature with after described conversion, the three primary colors of described image are adjusted, make the trichromatic ratio of described image reach balance.
A kind of method for controlling white balance that the embodiment of the present application provides, by the colour temperature of direct collection surround lighting, by the colour temperature collecting, can accurately determine the datum mark of white balance, and then accurately the image getting is carried out to blank level adjustment, and avoid after obtaining image, by comparative analysis, judge possible environment colour temperature, because this color temperature value accuracy is low, cannot accurately determine blank level adjustment algorithm, make white balance cannot accomplish problem accurately, improve the precision of blank level adjustment.
In above-described embodiment, the described colour temperature of utilizing described sensing module to gather surround lighting can comprise:
Sensing module gathers R, G, the B value (being the tristimulus values of surround lighting) of surround lighting (namely photo environment), colour temperature according to described R, G, B value judgement surround lighting, for example, can obtain the colour temperature of surround lighting by (colour temperature and the RGB CLUT) method of tabling look-up; Preferably, described sensing module can gather by RGB transducer R, G, the B value of surround lighting.
Refer to Fig. 2, the structural representation of a kind of white balance control device that Fig. 2 provides for the embodiment of the present application, comprising:
Image capture module 201, sensing module 202 and adjusting module 203;
Image capture module 201 is for gathering image; Obtain the scene image that will take.
Sensing module 202 is for gathering the colour temperature of surround lighting;
In the present embodiment, described sensing module 202 and described image capture module 201 collaborative works, take pictures preview (namely gathering image) simultaneously at image capture module 201, and sensing module 202 gathers the colour temperature of surround lighting;
Sensing module 202 gathers the colour temperature of surround lighting
Adjusting module 203 carries out blank level adjustment for the colour temperature according to described surround lighting to described image.
A kind of white balance control device that the embodiment of the present application provides, by sensing module, directly gather the colour temperature of surround lighting, avoid after obtaining image, by comparative analysis, judge possible environment colour temperature, because this color temperature value accuracy is low, cannot accurately determine blank level adjustment algorithm, make white balance cannot accomplish problem accurately, improve the precision of blank level adjustment.
Please refer to Fig. 3, the structural representation of the another kind of white balance control device that Fig. 3 provides for the embodiment of the present application, comprising:
Concrete, described transducer 302 comprises:
Collecting unit 3021, for gathering R, G, the B value (being the tristimulus values of surround lighting) of described surround lighting, preferred, collecting unit 3021 can be three primary colors transducer.
Acquiring unit 3022, for obtain the colour temperature of described surround lighting according to described R, G, B value, acquiring unit 3022 can obtain the colour temperature of surround lighting by (colour temperature and the RGB CLUT) method of tabling look-up.
Adjusting module 303 carries out blank level adjustment for the colour temperature according to described surround lighting to described image.
Concrete, described adjusting module 303 can comprise:
In order further to optimize above-described embodiment, described adjusting module 303 can also comprise converter unit 3033, when there is not adjustment algorithm corresponding to colour temperature with described surround lighting when described table, by default mapping algorithm, the colour temperature of described surround lighting is converted, make it be transformed into the colour temperature existing in described table;
Accordingly, described adjustment unit 3032 is also adjusted the three primary colors of described image for adjustment algorithm corresponding to the colour temperature according to after described conversion, makes the trichromatic ratio of described image reach balance.
The embodiment of the present application also provides a kind of electronic equipment, and this electronic equipment has white balance control device as above.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a method for controlling white balance, is applied to electronic equipment, and described electronic equipment at least has image capture module and sensing module, it is characterized in that, described method comprises:
When utilizing described image capture module to gather image, utilize described sensing module to gather the colour temperature of surround lighting;
Colour temperature according to described surround lighting is carried out blank level adjustment to described image.
2. method according to claim 1, is characterized in that, the described colour temperature of utilizing described sensing module to gather surround lighting comprises:
Described sensing module gathers R, G, the B value of surround lighting;
According to described R, G, B value, obtain the colour temperature of described surround lighting.
3. method according to claim 1, is characterized in that, the colour temperature of the described surround lighting of described foundation is carried out blank level adjustment to the image obtaining and comprised:
According to the colour temperature of described surround lighting, by tabling look-up, obtain the adjustment algorithm corresponding with the colour temperature of described surround lighting;
According to described adjustment algorithm, the three primary colors of described image are adjusted, made the three primary colors ratio of described image reach balance.
4. method according to claim 1, is characterized in that, the colour temperature of the described surround lighting of described foundation is carried out blank level adjustment to the image obtaining and also comprised:
While there is not adjustment algorithm corresponding to colour temperature with described surround lighting in described table, by default mapping algorithm, the colour temperature of described surround lighting is converted, according to the colour temperature after described conversion, by tabling look-up, obtain the adjustment algorithm corresponding with colour temperature after described conversion;
According to the adjustment algorithm that the colour temperature with after described conversion is corresponding, the three primary colors of described image are adjusted, made the trichromatic ratio of described image reach balance.
5. a white balance control device, is characterized in that, comprising:
Image capture module, for gathering image;
Sensing module, for gathering the colour temperature of surround lighting;
Adjusting module, carries out blank level adjustment for the colour temperature according to described surround lighting to described image.
6. white balance control device according to claim 5, is characterized in that, described sensing module comprises:
Collecting unit, for gathering R, G, the B value of described surround lighting;
Acquiring unit, for obtaining the colour temperature of described surround lighting according to described R, G, B value.
7. device according to claim 6, is characterized in that, described detecting unit is three primary colors transducer
8. device according to claim 5, is characterized in that, described adjusting module comprises:
Search unit, for the colour temperature according to described surround lighting, by tabling look-up, obtain the adjustment algorithm corresponding with the colour temperature of described surround lighting;
Adjustment unit, adjusts the three primary colors of described image by default adjustment algorithm for the colour temperature according to described surround lighting, makes the trichromatic ratio of described image reach balance.
9. device according to claim 8, is characterized in that, described adjusting module also comprises:
Converter unit, when there is not adjustment algorithm corresponding to colour temperature with described surround lighting when described table, converts the colour temperature of described surround lighting by default mapping algorithm;
Accordingly, described adjustment unit is also adjusted the three primary colors of described image for adjustment algorithm corresponding to the colour temperature according to after described conversion, makes the trichromatic ratio of described image reach balance.
10. an electronic equipment, is characterized in that, comprises the white balance control device as described in claim 5-9 any one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210300023.5A CN103634581A (en) | 2012-08-21 | 2012-08-21 | White balance control method, device and electronic equipment |
| US13/971,120 US9875724B2 (en) | 2012-08-21 | 2013-08-20 | Method and electronic device for adjusting display |
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| CN201210300023.5A CN103634581A (en) | 2012-08-21 | 2012-08-21 | White balance control method, device and electronic equipment |
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| WO2019061545A1 (en) * | 2017-09-30 | 2019-04-04 | 深圳传音通讯有限公司 | Method and device for rapidly adjusting white balance of camera and computer-readable storage medium |
| CN107705745A (en) * | 2017-09-30 | 2018-02-16 | 联想(北京)有限公司 | Adjust the method and system of color parameter |
| CN107731199A (en) * | 2017-10-27 | 2018-02-23 | 努比亚技术有限公司 | A kind of screen color temp adjusting method, terminal and computer-readable recording medium |
| CN107731199B (en) * | 2017-10-27 | 2020-12-29 | 努比亚技术有限公司 | Screen color temperature adjusting method, terminal and computer readable storage medium |
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| CN112449112A (en) * | 2020-11-18 | 2021-03-05 | 努比亚技术有限公司 | Camera white balance adjusting method, mobile terminal and computer readable storage medium |
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