CN105025283A - Novel color saturation adjusting method and system and mobile terminal - Google Patents
Novel color saturation adjusting method and system and mobile terminal Download PDFInfo
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Abstract
The invention discloses a novel color saturation adjusting method and system and a mobile terminal. The method comprises the following steps that the camera of the mobile terminal is started, and a YUV format image is outputted through normal exposure; the YUV format image is divided into N*N region blocks, and average brightness Y of each region block is calculated; high-brightness regions and low-brightness regions of the image are judged according to the size of the average brightness Y value of each region block; and color saturation of the image is adjusted, relatively high saturation is applied to the high-brightness regions so as to guarantee bright color of the high-brightness regions, and relatively low saturation is applied to the low-brightness regions so as to suppress color noise. Color saturation is adjusted on the basis of regions according to region brightness so that high saturation and bright color of the high-brightness regions can be guaranteed and the low-brightness regions have low saturation and color noise can be suppressed, the requirements of clients for the quality of images photographed by the mobile terminal can be met and better experience can be given to the clients.
Description
Technical field
The present invention relates to communication terminal technology field, more particularly, relate to a kind of new color saturation method of adjustment, system and mobile terminal.
Background technology
Present mobile terminal (as mobile phone) camera adjustment color saturation is all adjust according to light source color temperature value and brightness, but so often encounter a problem, overall picture saturation may be not high enough, and the colored noise in picture dark space clearly, this just causes the last photograph distortion or smudgy exported, the picture quality of expecting with user is not inconsistent, and reduces the experience of user.
Summary of the invention
The object of the invention is to overcome above-mentioned defect of the prior art, a kind of new color saturation adjustment System is provided, carry out subregion adjustment color saturation according to regional luminance, ensure the saturated height of highlight regions, bright in luster, and half-light region saturation is low, suppresses colored noise.
For achieving the above object, technical scheme provided by the invention is as follows: a kind of new color saturation method of adjustment, and the method comprises the following steps:
Mobile terminal opens camera, and normal exposure exports yuv format image;
Yuv format image is divided into N*N region unit, and calculates the mean flow rate Y of each region unit;
According to the size of each region unit mean flow rate Y value, judge the highlight regions of image and low bright area;
The color saturation of adjustment image, adopts higher saturation to highlight regions, ensures the bright in luster of highlight regions, adopts lower saturation, suppress colored noise to low bright area.
As preferably, yuv format image is being divided into N*N region unit, and is calculating in the step of the mean flow rate Y of each region unit, the method calculating the mean flow rate Y of each region unit is:
The brightness of all pixel values in the block of zoning, then the brightness of pixel values all in region unit averaged, this mean value is the mean flow rate Y of region unit.
As preferably, yuv format image is being divided into N*N region unit, and is calculating in the step of the mean flow rate Y of each region unit, also comprising the steps:
The threshold value Y1 of highlight regions is set, the threshold value Y2 of low bright area is set, if Y > is Y1, then judge that this region unit is as highlight regions; If Y < is Y2, then judge that this region unit is as low bright area.
As preferably, adjust the color saturation of image, adopt higher saturation in highlight regions, ensure the bright in luster of highlight regions, adopt lower saturation, suppress in the step of colored noise to low bright area, the method for the saturation of adjustment image is:
Do the module of colour correction at ISP, improve the cornerwise value of color correction matrix.
As preferably, adjust the color saturation of image, adopt higher saturation in highlight regions, ensure the bright in luster of highlight regions, adopt lower saturation, suppress in the step of colored noise to low bright area, the method for the saturation of adjustment image is:
In color conversion, directly improve the parameter value of saturation.
The present invention also provides a kind of new color saturation adjustment System, and this system comprises:
Image output module, opens camera for mobile terminal, and normal exposure exports yuv format image;
Brightness calculation module, for yuv format image is divided into N*N region unit, and calculates the mean flow rate Y of each region unit;
Judge module, for the size according to each region unit mean flow rate Y value, judges the highlight regions of image and low bright area;
Color adjusting module, for adjusting the color saturation of image, adopting higher saturation to highlight regions, ensureing the bright in luster of highlight regions, adopt lower saturation, suppress colored noise to low bright area.
As preferably, described brightness calculation module comprises calculated for pixel values module and mean value calculation module,
Described calculated for pixel values module, for the brightness of pixel values all in the block of zoning;
Described mean value calculation module, for the brightness of pixel values all in region unit being averaged, this mean value is the mean flow rate Y of region unit.
As preferably, described judge module comprises highlight regions setting module, low bright area setting module and threshold value comparison module;
Described highlight regions setting module, for arranging the threshold value Y1 of highlight regions;
Described low bright area setting module, for arranging the threshold value Y2 of low bright area;
Threshold value comparison module, if for Y > Y1, then judges that this region unit is as highlight regions; If Y < is Y2, then judge that this region unit is as low bright area.
As preferably, described color adjusting module adopts color correction module, and described color correction module does colour correction in ISP, improves the cornerwise value of color correction matrix.
As preferably, described color adjusting module adopts color conversion, and color conversion is used for the parameter value of directly raising saturation.
The present invention also provides a kind of mobile terminal, and this mobile terminal comprises above-mentioned new color saturation adjustment System.
Compared with prior art, beneficial effect of the present invention is:
1, the present invention carrys out subregion adjustment color saturation according to regional luminance, ensures highlight regions saturated height, bright in luster, and half-light region saturation is low, suppresses colored noise, meet client to mobile terminal the requirement of quality of taking a picture, better experience to client.
2, the present invention adopts color correction module or the saturation of color conversion to image to adjust, thus the problem that under better overcoming the low or half-light of image saturation, colored noise is large, promote the experience of user further.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the new color saturation method of adjustment flow chart that the embodiment of the present invention one provides;
Fig. 2 is the new color saturation method of adjustment flow chart that the embodiment of the present invention two provides;
Fig. 3 is the new color saturation adjustment System block diagram that the embodiment of the present invention three provides;
Fig. 4 is the new color saturation adjustment System block diagram that the embodiment of the present invention four provides.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Embodiments of the invention one provide a kind of new color saturation method of adjustment, are described in detail to the present embodiment below in conjunction with accompanying drawing.Fig. 1 is the method flow diagram of the embodiment of the present invention one, please refer to Fig. 1, and the method for the embodiment of the present invention comprises the following steps:
Step S101, mobile terminal open camera, and normal exposure exports yuv format image;
Step S102, yuv format image is divided into N*N region unit, and calculates the mean flow rate Y of each region unit;
Step S103, size according to each region unit mean flow rate Y value, judge the highlight regions of image and low bright area;
The color saturation of step S104, adjustment image, adopts higher saturation to highlight regions, ensures the bright in luster of highlight regions, adopt lower saturation, suppress colored noise to low bright area.
The present invention carrys out subregion adjustment color saturation according to regional luminance, ensures highlight regions saturated height, bright in luster, and half-light region saturation is low, suppresses colored noise, meet client to mobile terminal the requirement of quality of taking a picture, better experience to client.
Embodiment two
Embodiments of the invention two provide a kind of new color saturation adjustment System, are the improvement carried out on the basis of embodiment one.Fig. 2 is the method flow diagram of the embodiment of the present invention two, please refer to Fig. 2, and the method for the embodiment of the present invention comprises the following steps:
Step S201, mobile terminal open camera, and normal exposure exports yuv format image;
Step S202, yuv format image is divided into N*N region unit, the brightness of all pixel values in the block of zoning;
Step S203, then the brightness of pixel values all in region unit to be averaged, and calculate the mean flow rate Y of each region unit;
Step S204, size according to each region unit mean flow rate Y value, judge the highlight regions of image and low bright area; Be specially: the threshold value Y1 that highlight regions is set, the threshold value Y2 of low bright area is set, if Y > is Y1, then judge that this region unit is as highlight regions; If Y < is Y2, then judge that this region unit is as low bright area.
The color saturation of step S205, adjustment image, the method improving saturation generally has two: one to be the module doing colour correction at ISP, improves the cornerwise value of color correction matrix; Another utilizes color conversion exactly, and the parameter value directly improving saturation adopts higher saturation to highlight regions, ensures the bright in luster of highlight regions, adopts lower saturation, suppress colored noise to low bright area.
Embodiment three
Embodiments of the invention three provide a kind of new color saturation adjustment System, please refer to Fig. 3, the system of the embodiment of the present invention comprises image output module 1, brightness calculation module 2, judge module 3 and color adjusting module 4, described image output module 1, brightness calculation module 2, judge module 3 and color adjusting module 4 are linked in sequence, and are described in detail below by the function of each module.
Image output module 1, opens camera for mobile terminal, and normal exposure exports yuv format image;
Brightness calculation module 2, for yuv format image is divided into N*N region unit, and calculates the mean flow rate Y of each region unit;
Judge module 3, for the size according to each region unit mean flow rate Y value, judges the highlight regions of image and low bright area;
Color adjusting module 4, for adjusting the color saturation of image, adopting higher saturation to highlight regions, ensureing the bright in luster of highlight regions, adopt lower saturation, suppress colored noise to low bright area.
System of the present invention carrys out subregion adjustment color saturation according to regional luminance, ensures the saturated height of highlight regions, bright in luster, and half-light region saturation is low, suppress colored noise, meet client to mobile terminal the requirement of quality of taking a picture, better experience to client.
Embodiment four
Embodiments of the invention four provide a kind of new color saturation adjustment System, please refer to Fig. 4, the difference of the system of the embodiment of the present invention and the system of above-described embodiment three is, described brightness calculation module 2 comprises calculated for pixel values module 21 and mean value calculation module 22;
Described calculated for pixel values module 21, for the brightness of pixel values all in the block of zoning;
Described mean value calculation module 22, for the brightness of pixel values all in region unit being averaged, this mean value is the mean flow rate Y of region unit.
Described judge module 3 comprises highlight regions setting module 31, low bright area setting module 32 and threshold value comparison module 33;
Described highlight regions setting module 31, for arranging the threshold value Y1 of highlight regions;
Described low bright area setting module 32, for arranging the threshold value Y2 of low bright area;
Threshold value comparison module 33, if for Y > Y1, then judges that this region unit is as highlight regions; If Y < is Y2, then judge that this region unit is as low bright area.
Described color adjusting module 4 adopts color correction module, and described color correction module does colour correction in ISP, improves the cornerwise value of color correction matrix.
As the another kind of execution mode of the present embodiment, described color adjusting module adopts color conversion, and color conversion is used for the parameter value directly improving saturation.
Embodiment five
Inventive embodiment five provides a kind of mobile terminal, this mobile terminal comprises above-mentioned new color saturation adjustment System, can new color saturation method of adjustment corresponding to application of aforementioned, details, see the description of above-described embodiment one to embodiment four, do not repeat them here.
It should be noted that, a kind of communication terminal that above-described embodiment provides, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by system is divided into different functional modules, to complete all or part of function described above.In addition, this communication terminal can be mobile phone, panel computer, human-computer interaction terminal or other there is the communication terminal device of Menu key.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (11)
1. a new color saturation method of adjustment, it is characterized in that, the method comprises the following steps:
Mobile terminal opens camera, and normal exposure exports yuv format image;
Yuv format image is divided into N*N region unit, and calculates the mean flow rate Y of each region unit;
According to the size of each region unit mean flow rate Y value, judge the highlight regions of image and low bright area;
The color saturation of adjustment image, adopts higher saturation to highlight regions, ensures the bright in luster of highlight regions, adopts lower saturation, suppress colored noise to low bright area.
2. color saturation method of adjustment new according to claim 1, is characterized in that, yuv format image is being divided into N*N region unit, and is calculating in the step of the mean flow rate Y of each region unit, the method calculating the mean flow rate Y of each region unit is:
The brightness of all pixel values in the block of zoning, then the brightness of pixel values all in region unit averaged, this mean value is the mean flow rate Y of region unit.
3. color saturation method of adjustment new according to claim 1, is characterized in that, yuv format image is being divided into N*N region unit, and is calculating in the step of the mean flow rate Y of each region unit, also comprising the steps:
The threshold value Y1 of highlight regions is set, the threshold value Y2 of low bright area is set, if Y > is Y1, then judge that this region unit is as highlight regions; If Y < is Y2, then judge that this region unit is as low bright area.
4. color saturation method of adjustment new according to claim 1, it is characterized in that, the color saturation of adjustment image, higher saturation is adopted in highlight regions, ensure the bright in luster of highlight regions, adopt lower saturation to low bright area, suppress in the step of colored noise, the method for the saturation of adjustment image is:
Do the module of colour correction at ISP, improve the cornerwise value of color correction matrix.
5. color saturation method of adjustment new according to claim 1, it is characterized in that, the color saturation of adjustment image, higher saturation is adopted in highlight regions, ensure the bright in luster of highlight regions, adopt lower saturation to low bright area, suppress in the step of colored noise, the method for the saturation of adjustment image is:
In color conversion, directly improve the parameter value of saturation.
6. a new color saturation adjustment System, is characterized in that, this system comprises:
Image output module, opens camera for mobile terminal, and normal exposure exports yuv format image;
Brightness calculation module, for yuv format image is divided into N*N region unit, and calculates the mean flow rate Y of each region unit;
Judge module, for the size according to each region unit mean flow rate Y value, judges the highlight regions of image and low bright area;
Color adjusting module, for adjusting the color saturation of image, adopting higher saturation to highlight regions, ensureing the bright in luster of highlight regions, adopt lower saturation, suppress colored noise to low bright area.
7. color saturation adjustment System new according to claim 6, is characterized in that, described brightness calculation module comprises calculated for pixel values module and mean value calculation module,
Described calculated for pixel values module, for the brightness of pixel values all in the block of zoning;
Described mean value calculation module, for the brightness of pixel values all in region unit being averaged, this mean value is the mean flow rate Y of region unit.
8. color saturation adjustment System new according to claim 6, is characterized in that, described judge module comprises highlight regions setting module, low bright area setting module and threshold value comparison module;
Described highlight regions setting module, for arranging the threshold value Y1 of highlight regions;
Described low bright area setting module, for arranging the threshold value Y2 of low bright area;
Threshold value comparison module, if for Y > Y1, then judges that this region unit is as highlight regions; If Y < is Y2, then judge that this region unit is as low bright area.
9. color saturation adjustment System new according to claim 6, is characterized in that, described color adjusting module adopts color correction module, and described color correction module does colour correction in ISP, improves the cornerwise value of color correction matrix.
10. color saturation adjustment System new according to claim 6, is characterized in that, described color adjusting module adopts color conversion, and color conversion is used for the parameter value directly improving saturation.
11. 1 kinds of mobile terminals, is characterized in that, comprise the new color saturation adjustment System according to any one of claim 6-10.
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