CN100563348C - Automatic white balance is dynamically adjusted circuit - Google Patents
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Abstract
The invention discloses a kind of Automatic white balance and dynamically adjust circuit, it receives image data transmitted from optical sensor A, and under the control of program controling module, carry out operate as normal, comprise: the Automatic white balance processing module, the RGB interpolating module, its characteristics are, also comprise RGB gain digital adjusting module, described RGB gain digital adjusting module receives the view data A that optical pickocff sends, and it is carried out the digitlization gain adjust, and adjusted view data B sent to the RGB interpolating module, the view data C that described RGB interpolating module will carry out interpolation processing sends to described Automatic white balance processing module, described Automatic white balance processing module produces corresponding RGB gain parameter, and the RGB gain parameter is sent to RGB gain digital adjusting module; By improvement of the present invention, not only can realize the dynamic adjustment of Automatic white balance, and the external optical type of sensor that is not limited to.
Description
Technical field
The present invention relates to the digital image process field, relate in particular to a kind of automatic self-balance modulation circuit that in digital camera, is used for automatic white balance adjustment.
Background technology
Usually, under the different-colour lighting condition, the image color of finding of naked eye is still normal, and this is because the zero offset capability of brain; And the optical pickocff in the digital camera does not possess this ability, the view data of gathering for example by optical pickocff, blue partially down at higher colour temperature lighting condition (for example fluorescent lamp), at colour temperature lighting condition on the low side (tungsten lamp for example, red partially at dusk), so the Digital Image Processor in the digital camera need carry out suitable adjustment and compensation to the color of image, with the reduction color degree of balance, produce and naked eyes uniform images result, promptly carry out Automatic white balance and regulate.
Conventional Automatic white balance is regulated the adjustment that generally is based on the red, green, blue gain parameter of optical pickocff inside, and picture quality is belonged under deviation colour temperature lighting condition normally; When under less colour cast lighting condition, excessive as the adjusted basis of red, green, blue gain parameter, can cause in the Automatic white balance adjustment process picture quality transition unsmooth, produce visible colour cast saltus step; When under big colour cast lighting condition, too small as the adjusted basis of red, green, blue gain parameter, it is slow to cause Automatic white balance to be regulated the speed again, image quality decrease; In addition, need take different modes based on the variety classes of optical pickocff with model, all differences to some extent of the delay of the useful effect of the computational methods of gain parameter and logarithmic code shadow stream to the adjustment of the red, green, blue gain parameter of optical pickocff inside; This just makes that the red, green, blue gain-adjusted effect that only relies on optical pickocff is unsatisfactory.
Summary of the invention
In order to overcome the problems of the prior art and deficiency, the object of the present invention is to provide a kind of Automatic white balance dynamically to adjust circuit, it has increased the adjustment member of the digitlization red, green, blue gain parameter that is independent of the external optical transducer in this adjustment circuit inside, standard image format based on digital video signal processor inside is carried out unified processing, each adjustment comes into force in next whole frame of digital shadow stream, and the minimal adjustment step-length is 1;
The object of the present invention is to provide a kind of Automatic white balance dynamically to adjust circuit, it adopts the adjusted basis of different step-lengths under different lighting conditions, makes the Automatic white balance adjustment more stable more level and smooth more timely;
According to the foregoing invention purpose, the present invention proposes following scheme:
A kind of Automatic white balance is dynamically adjusted circuit, it receives the view data (A) that optical pickocff (10) transmits, and under the control of program controling module (30), carry out operate as normal, comprising: Automatic white balance processing module (26), RGB interpolating module (25)
The view data (C) that described RGB interpolating module (25) will carry out interpolation processing sends to described Automatic white balance processing module (26), and described Automatic white balance processing module (26) produces corresponding RGB gain parameter; Wherein, described Automatic white balance processing module (26) comprises frame statistical module (260) and the RGB gain parameter computing module (262) that the view data (C) after RGB interpolating module (25) interpolation processing is carried out the RGB color component of RGB component statistics;
Also comprise RGB gain digital adjusting module (22), described RGB gain digital adjusting module (22) receives the view data (A) that optical pickocff (10) sends, and it is carried out the digitlization gain adjust, and adjusted view data (B) sent to RGB interpolating module (25), the view data (C) that described RGB interpolating module (25) will carry out interpolation processing sends to described Automatic white balance processing module (26), described Automatic white balance processing module (26) produces corresponding RGB gain parameter, and the RGB gain parameter is sent to RGB gain digital adjusting module (22).
Further, also comprise software and hardware control selection module (27), described software and hardware control selection module (27) receives the RGB gain parameter from program controling module (30) and Automatic white balance processing module (26) respectively, and selects to send it to RGB gain digital adjusting module (22) after the parameter.
Further, also comprise inside and outside control selection module (24) and shine upon processing module (23) based on device property RGB gain parameter, wherein,
After described Automatic white balance processing module (26) produces corresponding RGB gain parameter, the RGB gain parameter is sent to described inside and outside control select module (24), described inside and outside control selects module (24) to select the RGB gain parameter is sent to based on device property RGB gain parameter mapping processing module (23) or RGB gain digital adjusting module (22); Describedly the RGB gain parameter that receives can be directly acted on optical pickocff (10) based on device property RGB gain parameter mapping processing module (23).
Further, also comprise software and hardware control selection module (27), the control of described software and hardware selects module (27) to receive RGB gain parameter from program controling module (30) and Automatic white balance processing module (26) respectively, and selects to send it to described inside and outside control selection module (24) after the parameter.
Further, described Automatic white balance processing module (26) also comprises red blue gain parameter adjusting step-length Dynamic control module (261), the frame statistical module (260) of described RGB color component sends red-green difference and indigo plant-green difference is regulated step-length Dynamic control module (261) to described red blue gain parameter, simultaneously, described red blue gain parameter is regulated difference threshold value and the maximum step-length of step-length Dynamic control module (261) reception from described program controling module (30), and sends red Blues joint step-length to described RGB gain parameter computing module (262).
Further, described RGB gain digital adjusting module (22) comprises frame synchronization control module (220) and gain calculation module (221), described frame synchronization control module (220) receives the RGB gain parameter and sends it to gain calculation module (221), simultaneously, described gain calculation module (221) according to the digitlization gain controlling information that receives to the view data adjustment that gains.
A kind of Automatic white balance is dynamically adjusted circuit, it receives the view data (A) that optical pickocff (10) transmits, and under the control of program controling module (30), carry out operate as normal, comprise: based on device property RGB gain parameter mapping processing module (23), Automatic white balance processing module (26), RGB interpolating module (25), described Automatic white balance processing module (26) comprises frame statistical module (260) and the RGB gain parameter computing module (262) that the view data (C) after RGB interpolating module (25) interpolation processing is carried out the RGB color component of RGB component statistics, described optical pickocff sends to described RGB interpolating module (25) with view data (A), the view data (C) that described RGB interpolating module (25) will carry out interpolation processing sends to described Automatic white balance processing module (26), described Automatic white balance processing module (26) produces corresponding RGB gain parameter and sends to described based on device property RGB gain parameter mapping processing module (23), describedly the RGB gain parameter that receives is directly acted on optical pickocff (10) based on device property RGB gain parameter mapping processing module (23)
Described Automatic white balance processing module (26) also comprises red blue gain parameter adjusting step-length Dynamic control module (261), the frame statistical module (260) of described RGB color component sends red-green difference and indigo plant-green difference is regulated step-length Dynamic control module (261) to described red blue gain parameter, simultaneously, described red blue gain parameter is regulated difference threshold value and the maximum step-length of step-length Dynamic control module (261) reception from described program controling module (30), and sends red Blues joint step-length to described RGB gain parameter computing module (262).
Further, also comprise software and hardware control selection module (27), described software and hardware control selection module (27) receives the RGB gain parameter from program controling module (30) and Automatic white balance processing module (26) respectively, and sends it to described based on device property RGB gain parameter mapping processing module (23) after the selection parameter.
Further, described program controling module (30) sends to the control of described software and hardware and selects the RGB gain parameter of module (27) to be produced by the Automatic white balance subprogram.
Further, described program controling module (30) sends to the control of described software and hardware and selects the RGB gain parameter of module (27) to be produced by manual configuration.
The contrast prior art the invention has the advantages that,
The present invention is red by having increased digitlization in automatic self-balance modulation circuit inside, green, the adjustment member of blue gain parameter, red as to optical pickocff inside, green, the replenishing and substituting of the adjustment of blue gain parameter, red when to outside optical pickocff, green, when blue gain-adjusted effect is undesirable, for example gain can not in time come into force, perhaps adjusting range excessive too small-be subject to optical pickocff to red, green, the indirect interpretation of blue gain parameter uses, by activating the red of Digital Image Processor inside, green, blue gain digital adjusting module is to realize automatic dynamic white balance function.The adjustment member of digitlization red, green, blue gain parameter, be independent of the diversity feature of external optical transducer, standard image format based on digital video signal processor inside is carried out unified processing, make it to carry out dynamic Automatic white balance adjustment, and come into force after each the adjustment in next whole frame of digital shadow stream to digital picture;
In addition, the present invention increases the dynamic step length adjusting control based on red, green, blue statistical value difference feature in the adjustment mechanism of calculating the red, green, blue gain parameter, to reach the adjusted basis that under different lighting conditions, adopts different step-lengths, make the Automatic white balance adjustment more stable more level and smooth more timely.
Above and other objects of the present invention, feature and advantage are from below in conjunction with accompanying drawing be not will become more obvious the specific descriptions of certain embodiments.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1;
Fig. 2 is the structural representation of the embodiment of the invention 2;
Fig. 3 is the structural representation of the embodiment of the invention 3;
Fig. 4 is the structural representation of the embodiment of the invention 4;
Fig. 5 is the structural representation of the embodiment of the invention 5;
Fig. 6 is the structural representation of Automatic white balance processing module;
Fig. 7 is the work schematic diagram that module is selected in Automatic white balance processing module and software and hardware control;
Fig. 8 has increased red, blue gain parameter to regulate the Automatic white balance processing module of step-length Dynamic control module and the work schematic diagram that module is selected in software and hardware control;
Fig. 9 is the schematic diagram of RGB gain digital adjusting module of the present invention;
Figure 10 regulates the step-length Dynamic control module for red, blue gain parameter of the present invention and carries out the schematic diagram that step-length is regulated;
Embodiment
In the progressively explanation below, known structure and function thereof will no longer describe in detail, to avoid there be unnecessary obscuring with content of the present invention.
Embodiment 1
Referring to Fig. 1, a kind of Automatic white balance is dynamically adjusted circuit, comprises an Automatic white balance processing module 26, a RGB interpolating module 25 and a RGB gain digital adjusting module 22; Optical pickocff 10 sends view data A to RGB gain digital adjusting module 22, described RGB gain digital adjusting module carries out the digitlization gain to view data A and adjusts, and adjusted digitlization white balance view data B sent to RGB interpolating module 25, described RGB interpolating module 25 will carry out digitlization white balance view data B interpolation processing, and the full-color image data C after the interpolation processing sent to Automatic white balance processing module 26, described Automatic white balance processing module 26 produces corresponding RGB gain parameter, and the RGB gain parameter is sent to RGB gain digital adjusting module 22;
As shown in Figure 9, RGB gain digital adjusting module 22 comprises a frame synchronization control module 220 and a gain calculation module 221, and described frame synchronization control module 220 receives the RGB gain parameter and sends it to gain calculation module 221; After program controling module 30 sends digitlization gain controlling information activation RGB gain digital adjusting module 22, described gain calculation module 221 according to receive by adjustment that view data A is gained, and adjusted digitlization white balance view data B sent; Frame synchronization control module 220 wherein guarantees that the red, green, blue gain parameter of upgrading in time acts on each whole frame of input picture, and the red, green, blue gain parameter acts on view data with its actual numerical value, and minimum adjustment step-length is 1;
As shown in Figure 6, wherein, described Automatic white balance processing module 26 comprises a frame statistical module 260 and a RGB gain parameter computing module 262 that the view data C after RGB interpolating module 25 interpolation processing is carried out the RGB color component of RGB component statistics; The frame statistical module 260 of wherein said RGB color component sends red-green difference and indigo plant-green difference RGB gain parameter computing module 262;
In addition, the next image processing section that also can be sent in the digital camera of the full-color image data C after the interpolation processing is further handled.
Embodiment 2
As shown in Figure 2, present embodiment is on the basis of embodiment 1, increase a software and hardware control and selected module 27, described software and hardware control selection module 27 receives the RGB gain parameter from program controling module 30 and Automatic white balance processing module 26 respectively, software and hardware control selects module 27 that this two classes parameter is selected, and the parameter after will selecting sends to RGB gain digital adjusting module 22;
As shown in Figure 7, wherein the RGB gain parameter of module 27 receptions from program controling module 30 selected in software and hardware control; Wherein the RGB gain parameter sent of program controling module 30 can be also can being produced by manual configuration of producing of Automatic white balance subprogram, when this RGB gain parameter is when being produced by the Automatic white balance subprogram, program controling module 30 needs to receive RGB statistical value red, blue, that the frame statistical module 260 of green tint component sends over be used to generate gain parameter.
Embodiment 3
As shown in Figure 3, present embodiment is on the basis of embodiment 1, control is selected module 24 and is shone upon processing module 23 based on device property RGB gain parameter inside and outside having increased by one, after Automatic white balance processing module 26 produces corresponding RGB gain parameter, the RGB gain parameter is sent to described inside and outside control select module 24, described inside and outside control selects module 24 to select the RGB gain parameter is sent to based on device property RGB gain parameter mapping processing module 23 or RGB gain digital adjusting module 22; Describedly the RGB gain parameter that receives can be directly acted on optical pickocff 10 based on device property RGB gain parameter mapping processing module 23.
Embodiment 4
As shown in Figure 4, present embodiment is on the basis of embodiment 3, increase a software and hardware control and selected module 27, described software and hardware control selection module 27 receives the RGB gain parameter from program controling module 30 and Automatic white balance processing module 26 respectively, software and hardware control selects module 27 that this two classes parameter is selected, and the parameter after will selecting sends to inside and outside control selection module 24; Inside and outside control is selected module 24 to select as required the RGB gain parameter sent to based on device property RGB gain parameter mapping processing module 23 or RGB gain digital adjusting module 22 to carry out gain-adjusted again.
Embodiment 5
As shown in Figure 5, present embodiment comprises one based on device property RGB gain parameter mapping processing module 23, an Automatic white balance processing module 26, a RGB interpolating module 25, described optical pickocff sends to described RGB interpolating module 25 with view data A, the view data C that RGB interpolating module 25 will carry out interpolation processing sends to described Automatic white balance processing module 26, Automatic white balance processing module 26 produces corresponding RGB gain parameters and also sends to based on device property RGB gain parameter mapping processing module 23, describedly based on device property RGB gain parameter mapping processing module 23 new RGB gain parameter is directly acted on optical pickocff 10;
But in the present embodiment, described Automatic white balance processing module 26 has also increased a red blue gain parameter with respect to common Automatic white balance processing module shown in Figure 6 and has regulated step-length Dynamic control module 261, as shown in Figure 8, the frame statistical module 260 of RGB color component sends red-green difference and indigo plant-green difference is regulated step-length Dynamic control module 261 to described red blue gain parameter, simultaneously, described red blue gain parameter is regulated difference thresholding and the maximum step-length that step-length Dynamic control module 261 receives from described program controling module 30, and sends red Blues joint step-length to described RGB gain parameter computing module 262; The frame statistical module 260 of RGB color component also can send the RGB statistical value to the software Automatic white balance subprogram in the program controling module 30 simultaneously, to be used for the realization that software produces the RGB gain parameter;
As shown in figure 10, regulate step-length Dynamic control module 261 for red, blue gain parameter of the present invention and carry out the schematic diagram that step-length is regulated,
In hardware Automatic white balance processing module 26 inside, red, blue, green gain parameter computing module 262 realizes that the computational methods of solidifying are as follows:
Red-green or blue-green difference＞0, new red, blue gain parameter=original red, blue gain parameter-red or Blues synchronizing is long
Red-green or blue-green difference＜0, new red, blue gain parameter=original red, blue gain parameter+red or Blues synchronizing is long
And red, blue gain parameter is regulated step-length Dynamic control module 261, scope of living in (difference thresholding 1 according to current red-green or blue-green difference, 2 can be controlled flexibly by external program), select the corresponding step-length of adjusting to act on red, blue, green gain parameter computing module 262, can guarantee under trickle colour cast condition, not adjust image color and keep picture steadiness, adjust image color as early as possible and reach the color balance state under super large colour cast condition, careful adjustment image color guarantees the level and smooth continuity of picture quality transition under medium colour cast condition.
| red-green or blue-green difference |＜=difference thresholding 1, red or Blues synchronizing long=0
Difference thresholding 1＜| red-green or blue-green difference |＜=difference thresholding 2, adjust step-length=1
| red-green or blue-green difference |＞difference thresholding 2, red or Blues synchronizing length=maximum step-length
So far, the solution of the present invention is able to complete description, but Automatic white balance of the present invention is dynamically adjusted circuit, be not restricted to listed utilization in specification and the execution mode, it can be applied to the field of various suitable the utility model fully, for those skilled in the art, can easily realize additional advantage and make amendment, therefore under the situation of the spirit and scope of the universal that does not deviate from claim and equivalency range and limited, the examples shown that the present invention is not limited to specific details, representational equipment and illustrates here and describe.
Claims (10)
1. an Automatic white balance is dynamically adjusted circuit, it receives the view data (A) that optical pickocff (10) transmits, and under the control of program controling module (30), carry out operate as normal, comprising: Automatic white balance processing module (26), RGB interpolating module (25)
The view data (C) that described RGB interpolating module (25) will carry out interpolation processing sends to described Automatic white balance processing module (26), and described Automatic white balance processing module (26) produces corresponding RGB gain parameter;
Wherein, described Automatic white balance processing module (26) comprises frame statistical module (260) and the RGB gain parameter computing module (262) that the view data (C) after RGB interpolating module (25) interpolation processing is carried out the RGB color component of RGB component statistics;
It is characterized in that,
Also comprise RGB gain digital adjusting module (22), described RGB gain digital adjusting module (22) receives the view data (A) that optical pickocff (10) sends, and it is carried out the digitlization gain adjust, and adjusted view data (B) sent to RGB interpolating module (25), the view data (C) that described RGB interpolating module (25) will carry out interpolation processing sends to described Automatic white balance processing module (26), described Automatic white balance processing module (26) produces corresponding RGB gain parameter, and the RGB gain parameter is sent to RGB gain digital adjusting module (22).
2. Automatic white balance according to claim 1 is dynamically adjusted circuit, it is characterized in that, also comprise software and hardware control selection module (27), described software and hardware control selection module (27) receives the RGB gain parameter from program controling module (30) and Automatic white balance processing module (26) respectively, and selects to send it to RGB gain digital adjusting module (22) after the parameter.
3. Automatic white balance according to claim 1 is dynamically adjusted circuit, it is characterized in that, and also comprise inside and outside control selection module (24) and shine upon processing module (23) based on device property RGB gain parameter, wherein,
After described Automatic white balance processing module (26) produces corresponding RGB gain parameter, the RGB gain parameter is sent to described inside and outside control select module (24), described inside and outside control selects module (24) to select the RGB gain parameter is sent to based on device property RGB gain parameter mapping processing module (23) or RGB gain digital adjusting module (22); Describedly the RGB gain parameter that receives is directly acted on optical pickocff (10) based on device property RGB gain parameter mapping processing module (23).
4. Automatic white balance according to claim 3 is dynamically adjusted circuit, it is characterized in that, also comprise software and hardware control selection module (27), the control of described software and hardware selects module (27) to receive RGB gain parameter from program controling module (30) and Automatic white balance processing module (26) respectively, and selects to send it to described inside and outside control selection module (24) after the parameter.
5. dynamically adjust circuit according to claim from 1 to 4 any described Automatic white balance, it is characterized in that, described Automatic white balance processing module (26) also comprises red blue gain parameter adjusting step-length Dynamic control module (261), the frame statistical module (260) of described RGB color component sends red-green difference and indigo plant-green difference is regulated step-length Dynamic control module (261) to described red blue gain parameter, simultaneously, described red blue gain parameter is regulated difference threshold value and the maximum step-length of step-length Dynamic control module (261) reception from described program controling module (30), and sends red Blues joint step-length to described RGB gain parameter computing module (262).
6. dynamically adjust circuit according to claim from 1 to 4 any described Automatic white balance, it is characterized in that, described RGB gain digital adjusting module (22) comprises frame synchronization control module (220) and gain calculation module (221), described frame synchronization control module (220) receives the RGB gain parameter and sends it to gain calculation module (221), simultaneously, described gain calculation module (221) according to the digitlization gain controlling information that receives to the view data adjustment that gains.
7. an Automatic white balance is dynamically adjusted circuit, it receives the view data (A) that optical pickocff (10) transmits, and under the control of program controling module (30), carry out operate as normal, comprise: based on device property RGB gain parameter mapping processing module (23), Automatic white balance processing module (26), RGB interpolating module (25), described Automatic white balance processing module (26) comprises frame statistical module (260) and the RGB gain parameter computing module (262) that the view data (C) after RGB interpolating module (25) interpolation processing is carried out the RGB color component of RGB component statistics, described optical pickocff sends to described RGB interpolating module (25) with view data (A), the view data (C) that described RGB interpolating module (25) will carry out interpolation processing sends to described Automatic white balance processing module (26), described Automatic white balance processing module (26) produces corresponding RGB gain parameter and sends to described based on device property RGB gain parameter mapping processing module (23), describedly the RGB gain parameter that receives is directly acted on optical pickocff (10) based on device property RGB gain parameter mapping processing module (23), it is characterized in that
Described Automatic white balance processing module (26) also comprises red blue gain parameter adjusting step-length Dynamic control module (261), the frame statistical module (260) of described RGB color component sends red-green difference and indigo plant-green difference is regulated step-length Dynamic control module (261) to described red blue gain parameter, simultaneously, described red blue gain parameter is regulated difference threshold value and the maximum step-length of step-length Dynamic control module (261) reception from described program controling module (30), and sends red Blues joint step-length to described RGB gain parameter computing module (262).
8. Automatic white balance according to claim 7 is dynamically adjusted circuit, it is characterized in that, also comprise software and hardware control selection module (27), described software and hardware control selection module (27) receives the RGB gain parameter from program controling module (30) and Automatic white balance processing module (26) respectively, and sends it to described based on device property RGB gain parameter mapping processing module (23) after the selection parameter.
9. dynamically adjust circuit according to claim 2 or 4 or 8 described Automatic white balance, it is characterized in that, described program controling module (30) sends to described software and hardware control and selects the RGB gain parameter of module (27) to be produced by the Automatic white balance subprogram.
10. dynamically adjust circuit according to claim 2 or 4 or 8 described Automatic white balance, it is characterized in that, described program controling module (30) sends to described software and hardware control and selects the RGB gain parameter of module (27) to be produced by manual configuration.
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| KR20100066855A (en) * | 2008-12-10 | 2010-06-18 | 삼성전자주식회사 | Imaging apparatus and imaging method |
| CN101996585A (en) * | 2010-11-03 | 2011-03-30 | 中航华东光电有限公司 | RGB three primary colours LED backlight based automatic white balance adjustment system and method thereof |
| CN102196274B (en) * | 2011-05-10 | 2013-01-16 | 西安理工大学 | Automatic white balance method based on color mapping |
| TWI554116B (en) * | 2012-10-16 | 2016-10-11 | 鴻海精密工業股份有限公司 | Method for regulating white balancing |
| CN103780890B (en) * | 2012-10-17 | 2017-07-14 | 鸿富锦精密工业（深圳）有限公司 | White balance adjustment method |
| CN105976331A (en) * | 2016-04-29 | 2016-09-28 | 乐视控股（北京）有限公司 | Method for adjusting white balance of image and system |
| CN108682407B (en) * | 2018-06-14 | 2020-04-14 | 业成科技（成都）有限公司 | Automatic color temperature adjusting method |
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