CN103618858A - Color correction method and device for mobile terminal camera - Google Patents
Color correction method and device for mobile terminal camera Download PDFInfo
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- CN103618858A CN103618858A CN201310657791.0A CN201310657791A CN103618858A CN 103618858 A CN103618858 A CN 103618858A CN 201310657791 A CN201310657791 A CN 201310657791A CN 103618858 A CN103618858 A CN 103618858A
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Abstract
The invention discloses a color correction method and device for a mobile terminal camera. According to the method, image data shot by the camera are obtained, whether chromatic aberration pixels exist in each frame of the image data is detected, if yes, the chromatic aberration pixels are compensated, by correcting the chromatic aberration pixels of each frame of the image data, a mobile terminal automatically detects whether chromatic aberration exists in the shot image data in the shooting process of the camera and automatically corrects the colors of the chromatic aberration pixels, and therefore great convenience is brought to users.
Description
Technical field
The present invention relates to mobile terminal camera and show field, in particular a kind of color correcting method of mobile terminal camera and device.
Background technology
Mobile terminal has all been worn camera (Camera) at present, and mobile terminal is used the frequency of camera (Camera) very high, and camera (Camera) is in use procedure all the year round, likely can cause color distortion, be about to a certain color data and respond to into another kind of color data, such as the color distortion of some pixel, the photo poor effect that causes user to take.In the prior art, be all generally that the image that camera is taken carries out integral body adjustment, for example U.S. figure is elegant waits software, does not still solve the method for this color distortion, and it is inconvenient greatly to user, to have brought like this.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of color correcting method and device of mobile terminal camera, is intended to solve the problem that existing mobile terminal camera cannot be proofreaied and correct color distortion pixel.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A color correcting method for mobile terminal camera, wherein, comprises the following steps:
A, obtain the view data that camera photographs;
B, detect in each frame image data, whether there is color distortion pixel, if existed, described color distortion pixel is compensated.
The color correcting method of described mobile terminal camera, wherein, described step B specifically comprises:
B1, detect the YUV value of each pixel in each frame image data, and calculate the difference between the YUV value of four the adjacent pixels in the YUV value of each pixel and this pixel upper and lower, left and right, if the difference of the YUV value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
B2, calculate the mean value of YUV value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the YUV value of described color distortion pixel.
The color correcting method of described mobile terminal camera, wherein, described step B1 comprises:
If the coordinate of any one pixel is (x, y), the YUV value of this pixel is Y
(x, y)u
(x, y)v
(x, y), predetermined threshold is TH, below meeting during four conditions simultaneously: condition one, | Y
(x, y)-Y
(x+1, y)| >TH or | U
(x, y)-U
(x+1, y)| >TH or | V
(x, y)-V
(x+1, y)| >TH; Condition two, | Y
(x, y)-Y
(x, y+1)| >TH or | U
(x, y)-U
(x, y+1)| >TH or | V
(x, y)-V
(x, y+1)| >TH; Condition three, | Y
(x, y)-Y
(x-1, y)| >TH or | U
(x, y)-U
(x-1, y)| >TH or | V
(x, y)-V
(x-1, y)| >TH; Condition four, | Y
(x, y)-Y
(x, y-1)| >TH or | U
(x, y)-U
(x, y-1)| >TH or | V
(x, y)-V
(x, y-1)| >TH; This pixel (x, y) is color distortion pixel.
The color correcting method of described mobile terminal camera, wherein, described step B2 comprises:
If the coordinate of color distortion pixel is (x, y), calculate the mean value of YUV value of four neighbors in upper and lower, left and right of described color distortion pixel:
Y=（Y
(x+1,y)+Y
(x,y+1)+Y
(x-1,y)+Y
(x,y-1)）/4；
U=（U
(x+1,y)+U
(x,y+1)+U
(x-1,y)+U
(x,y-1)）/4；
V=（V
(x+1,y)+V
(x,y+1)+V
(x-1,y)+V
(x,y-1)）/4；
And described mean value is set to the YUV value of described color distortion pixel.
The color correcting method of described mobile terminal camera, wherein, described step B also comprises:
B3, detect the rgb value of each pixel in each frame image data, and calculate the difference between the rgb value of four the adjacent pixels in the rgb value of each pixel and this pixel upper and lower, left and right, if the difference of the rgb value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
B4, calculate the mean value of rgb value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the rgb value of described color distortion pixel.
The color correcting method of described mobile terminal camera wherein, also comprises after described step B:
C, the view data after described color distortion pixel is compensated is sent to display module show; If there is no color distortion pixel, sends to display module by described view data and shows.
A colour correcting apparatus for mobile terminal camera, wherein, comprising:
Image collection module, the view data photographing for obtaining camera;
Image correction module, for detection of whether there being color distortion pixel in each frame image data, if existed, compensates described color distortion pixel.
The colour correcting apparatus of described mobile terminal camera, wherein, described image correction module comprises:
The first distortion pixel judging unit, YUV value for detection of each pixel in each frame image data, and calculate the difference between the YUV value of four the adjacent pixels in the YUV value of each pixel and this pixel upper and lower, left and right, if the difference of the YUV value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
The first distortion pixel compensation unit, for calculating the mean value of YUV value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the YUV value of described color distortion pixel.
The colour correcting apparatus of described mobile terminal camera, wherein, also comprises:
Image display, shows for the view data after described color distortion pixel is compensated is sent to display module; If there is no color distortion pixel, sends to display module by described view data and shows.
The colour correcting apparatus of described mobile terminal camera, wherein, described image correction module comprises:
The second distortion pixel judging unit, rgb value for detection of each pixel in each frame image data, and calculate the difference between the rgb value of four the adjacent pixels in the rgb value of each pixel and this pixel upper and lower, left and right, if the difference of the rgb value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
The second distortion pixel compensation unit, for calculating the mean value of rgb value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the rgb value of described color distortion pixel.
The color correcting method of mobile terminal camera provided by the present invention and device, the view data that its method photographs by obtaining camera; Detect in each frame image data whether have color distortion pixel, if existed, described color distortion pixel is compensated; Can in using camera process, automatically detect the situation whether camera exists color distortion, and record the method for adjustment of pixel coordinate and the distortion color of color distortion, reach the object of automatic calibration color, it is convenient greatly to user, to have brought, its implementation is simple, by software, realize, cost is lower.
Accompanying drawing explanation
Fig. 1 is the flow chart of the color correcting method preferred embodiment of mobile terminal camera provided by the invention.
Fig. 2 is the structured flowchart of the colour correcting apparatus preferred embodiment of mobile terminal camera provided by the invention.
Embodiment
The invention provides a kind of color correcting method and device of mobile terminal camera, for making object of the present invention, technical scheme and advantage clearer, clear and definite, referring to accompanying drawing, developing simultaneously, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 1, the flow chart of the color correcting method preferred embodiment that Fig. 1 is mobile terminal camera provided by the invention, described color correcting method, comprises the following steps:
Step S100, obtain the view data that camera photographs;
Step S200, detect in each frame image data, whether there is color distortion pixel, if existed, described color distortion pixel is compensated.
Below in conjunction with specific embodiment, above-mentioned steps is described in detail.
In step S100, first obtain the view data that camera photographs.Specifically, when user opens mobile terminal camera, camera induction surrounding environment, and captured image data.The view data that acquisition for mobile terminal camera photographs.This is prior art, no longer too much describes herein.
In step S200, detect in each frame image data whether have color distortion pixel, if existed, described color distortion pixel is compensated.Specifically, the view data of taking due to camera is one by one, and different pixels can exist some distortion for different colors, some distortionless situation, such as the demonstration of this pixel is red undistorted, but show that blue words will distortion.The present invention is by detecting each frame image data, because each frame image data comprises a plurality of pixels, so due to the color distortion phenomenon there will be in camera shooting process, show in each frame image data as there is corresponding color distortion pixel, first the present invention detects in each frame image data, whether there is color distortion pixel, by detecting the image data value of each pixel in each frame image data, and the difference of image data value of four pixels of image data value and its upper and lower, left and right of judging this pixel is all over a predetermined threshold value.Then the color distortion pixel existing in each frame image data is compensated, be about to the mean value of four pixel image datas adjacent with this color distortion pixel as the image data value of color distortion pixel.This be because, in each two field picture, in this magnitude of pixel, image color can not suddenly change, and only meeting gradual change, if the difference of the color of so some pixels and around four pixels is excessive, for example up and down, adopt the mean value of four pixels around to replace this pixel, thereby make the integral image can distortion, better effects if.
Described image data value is the value that characterizes color by numeral, in general can be rgb value or YUV value.Each color has a definite color weight.In general with different rgb values, represent different colors.R: redness, G: green, B: blueness is three primary colors by RGB, can obtain all colors by these three blend of colors.For example (0,0,0) is exactly white, because three kinds of colors are all the most shallow; (255,0,0) is exactly pure red; And (255,255,255) are exactly black.Three kinds of color RGB of the numerical value that this is corresponding are added together, just can form shades of colour, and the corresponding rgb value of each color.A kind of colour coding method that in like manner YUV is adopted by eurovision system, also can characterize by YUV value the color of pixel.And same color, YUV value and rgb value can be changed by corresponding formula, and as for how to change, this is prior art, no longer too much describes herein.
Take and adopt yuv format to be described as follows as example, judge successively the YUV value of each pixel in a two field picture, check this pixel YUV value and upper, under, left, difference between the YUV value of right four adjacent pixels, if this pixel is simultaneously different all over a threshold value with the YUV value difference of adjacent four pixels, think that this pixel is a color distortion pixel, and recording the coordinate of this pixel, view data (the distortion value that this pixel is current, the YUV value of current this pixel), on, under, left, mean value (the offset of right four neighbor view data, the mean value of four neighbor YUV values), wherein, (pixel image data is Y1U1V1 to two adjacent elements mutually, one other pixel view data is Y2U2V2) if between meet Y1-Y2>TH or U1-U2>TH or V1-V2>TH, think that difference between these two pixels surpasses predetermined threshold TH.
Further, described step S200 specifically comprises:
S210, detect the YUV value of each pixel in each frame image data, and calculate the difference between the YUV value of four the adjacent pixels in the YUV value of each pixel and this pixel upper and lower, left and right, if the difference of the YUV value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
S220, calculate the mean value of YUV value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the YUV value of described color distortion pixel.
Specifically, the coordinate of establishing any one pixel is (x, y), and the YUV value of this pixel is Y
(x, y)u
(x, y)v
(x, y), predetermined threshold is TH, below meeting during four conditions simultaneously:
Condition one, | Y
(x, y)-Y
(x+1, y)| >TH or | U
(x, y)-U
(x+1, y)| >TH or | V
(x, y)-V
(x+1, y)| >TH;
Condition two, | Y
(x, y)-Y
(x, y+1)| >TH or | U
(x, y)-U
(x, y+1)| >TH or | V
(x, y)-V
(x, y+1)| >TH;
Condition three, | Y
(x, y)-Y
(x-1, y)| >TH or | U
(x, y)-U
(x-1, y)| >TH or | V
(x, y)-V
(x-1, y)| >TH;
Condition four, | Y
(x, y)-Y
(x, y-1)| >TH or | U
(x, y)-U
(x, y-1)| >TH or | V
(x, y)-V
(x, y-1)| >TH;
This pixel (x, y) is color distortion pixel.Then the coordinate of establishing color distortion pixel is (x, y), calculates the mean value of YUV value of four neighbors in upper and lower, left and right of described color distortion pixel: Y=(Y
(x+1, y)+ Y
(x, y+1)+ Y
(x-1, y)+ Y
(x, y-1))/4; U=(U
(x+1, y)+ U
(x, y+1)+ U
(x-1, y)+ U
(x, y-1))/4; V=(V
(x+1, y)+ V
(x, y+1)+ V
(x-1, y)+ V
(x, y-1))/4; And described mean value is set to the YUV value of described color distortion pixel.Namely change the YUV value of this distortion pixel into the around mean value of four pixels.
In like manner, also can detect the rgb value of each pixel in each frame image data, this is identical with the method for YUV, repeats no more herein.
Further, after described step S200, also comprise:
S300, the view data after described color distortion pixel is compensated is sent to display module show; If there is no color distortion pixel, sends to display module by described view data and shows.Specifically, in step S200, if there is not color distortion pixel, described view data is sent to display module and show.If color distortion pixel detected, adopt said method to compensate, then the view data after compensation is sent to display module and shows, such as show on LCD etc. display.
Preferably, the present invention can also adopt two frame image datas before and after contrast, and the heterochromia of the image at same coordinate place is proofreaied and correct, and when both color-values difference is larger, adopts the color mean value of pixel around to proofread and correct.It should be noted that, the present invention adopts is that the pixel up and down of certain pixel and this pixel determines whether color distortion pixel, at edge pixel, judge that its pixel having judges that (such as certain edge pixel point only has three pixels of upper bottom right around around, if color distortion pixel, also adopts the pixel of bottom right on this to compensate).And preferably, the present invention only adopts four pixels up and down, just in order to illustrate, the present invention can also adopt 8 pixel (nine grids structures of surrounding of pixel, be upper and lower, left and right, upper left, upper right, sit down, bottom right) comparing determines whether color distortion pixel, and then compensate.Also can adopt the judgement of comparing of more pixel, this is all within protection scope of the present invention.
The color correcting method of mobile terminal camera provided by the invention, by the color distortion pixel in view data, proofread and correct, by the color distortion pixel that each frame image data is existed, proofread and correct, can in using camera process, automatically detect the situation whether camera exists color distortion, and record the method for adjustment of pixel coordinate and the distortion color of color distortion, reach the object of automatic calibration color, make mobile terminal in the shooting process of camera, automatically detect the view data of taking and whether have color distortion, and its color of pixel automatic calibration to color distortion, it is convenient greatly to user, to have brought, its implementation is simple, by software, realize, cost is lower.
Color correcting method based on above-mentioned mobile terminal camera, the present invention also provides a kind of colour correcting apparatus of mobile terminal camera, refer to Fig. 2, Fig. 2 is the structured flowchart of the colour correcting apparatus preferred embodiment of mobile terminal camera provided by the invention, as shown in Figure 2, described colour correcting apparatus comprises:
Preferably, described image correction module 20 comprises:
The first distortion pixel judging unit, YUV value for detection of each pixel in each frame image data, and calculate the difference between the YUV value of four the adjacent pixels in the YUV value of each pixel and this pixel upper and lower, left and right, if the difference of the YUV value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
The first distortion pixel compensation unit, for calculating the mean value of YUV value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the YUV value of described color distortion pixel.
Preferably, described image correction module 20 comprises:
The second distortion pixel judging unit, rgb value for detection of each pixel in each frame image data, and calculate the difference between the rgb value of four the adjacent pixels in the rgb value of each pixel and this pixel upper and lower, left and right, if the difference of the rgb value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
The second distortion pixel compensation unit, for calculating the mean value of rgb value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the rgb value of described color distortion pixel.
The colour correcting apparatus of described mobile terminal camera, wherein, also comprises:
Image display, shows for the view data after described color distortion pixel is compensated is sent to display module; If there is no color distortion pixel, sends to display module by described view data and shows.
In sum, the color correcting method of a kind of mobile terminal camera provided by the invention and device, the view data that described method photographs by obtaining camera; Detect in each frame image data whether have color distortion pixel, if existed, described color distortion pixel is compensated; In mobile terminal camera head shooting, the pixel of color distortion in the view data of taking is compensated, automatic calibration color, it is convenient greatly to user, to have brought, its implementation is simple, by software, realize, cost is lower, has effectively removed the problem of error detection while clenching fist.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (10)
1. a color correcting method for mobile terminal camera, is characterized in that, comprises the following steps:
A, obtain the view data that camera photographs;
B, detect in each frame image data, whether there is color distortion pixel, if existed, described color distortion pixel is compensated.
2. the color correcting method of mobile terminal camera according to claim 1, is characterized in that, described step B specifically comprises:
B1, detect the YUV value of each pixel in each frame image data, and calculate the difference between the YUV value of four the adjacent pixels in the YUV value of each pixel and this pixel upper and lower, left and right, if the difference of the YUV value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
B2, calculate the mean value of YUV value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the YUV value of described color distortion pixel.
3. the color correcting method of mobile terminal camera according to claim 2, is characterized in that, described step B1 comprises:
If the coordinate of any one pixel is (x, y), the YUV value of this pixel is Y
(x, y)u
(x, y)v
(x, y), predetermined threshold is TH, below meeting during four conditions simultaneously: condition one, | Y
(x, y)-Y
(x+1, y)| >TH or | U
(x, y)-U
(x+1, y)| >TH or | V
(x, y)-V
(x+1, y)| >TH; Condition two, | Y
(x, y)-Y
(x, y+1)| >TH or | U
(x, y)-U
(x, y+1)| >TH or | V
(x, y)-V
(x, y+1)| >TH; Condition three, | Y
(x, y)-Y
(x-1, y)| >TH or | U
(x, y)-U
(x-1, y)| >TH or | V
(x, y)-V
(x-1, y)| >TH; Condition four, | Y
(x, y)-Y
(x, y-1)| >TH or | U
(x, y)-U
(x, y-1)| >TH or | V
(x, y)-V
(x, y-1)| >TH; This pixel (x, y) is color distortion pixel.
4. the color correcting method of mobile terminal camera according to claim 2, is characterized in that, described step B2 comprises:
If the coordinate of color distortion pixel is (x, y), calculate the mean value of YUV value of four neighbors in upper and lower, left and right of described color distortion pixel:
Y=（Y
(x+1,y)+Y
(x,y+1)+Y
(x-1,y)+Y
(x,y-1)）/4；
U=（U
(x+1,y)+U
(x,y+1)+U
(x-1,y)+U
(x,y-1)）/4；
V=（V
(x+1,y)+V
(x,y+1)+V
(x-1,y)+V
(x,y-1)）/4；
And described mean value is set to the YUV value of described color distortion pixel.
5. the color correcting method of mobile terminal camera according to claim 1, is characterized in that, described step B also comprises:
B3, detect the rgb value of each pixel in each frame image data, and calculate the difference between the rgb value of four the adjacent pixels in the rgb value of each pixel and this pixel upper and lower, left and right, if the difference of the rgb value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
B4, calculate the mean value of rgb value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the rgb value of described color distortion pixel.
6. the color correcting method of mobile terminal camera according to claim 1, is characterized in that, after described step B, also comprises:
C, the view data after described color distortion pixel is compensated is sent to display module show; If there is no color distortion pixel, sends to display module by described view data and shows.
7. a colour correcting apparatus for mobile terminal camera, is characterized in that, comprising:
Image collection module, the view data photographing for obtaining camera;
Image correction module, for detection of whether there being color distortion pixel in each frame image data, if existed, compensates described color distortion pixel.
8. the colour correcting apparatus of mobile terminal camera according to claim 7, is characterized in that, described image correction module comprises:
The first distortion pixel judging unit, YUV value for detection of each pixel in each frame image data, and calculate the difference between the YUV value of four the adjacent pixels in the YUV value of each pixel and this pixel upper and lower, left and right, if the difference of the YUV value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
The first distortion pixel compensation unit, for calculating the mean value of YUV value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the YUV value of described color distortion pixel.
9. the colour correcting apparatus of mobile terminal camera according to claim 7, is characterized in that, also comprises:
Image display, shows for the view data after described color distortion pixel is compensated is sent to display module; If there is no color distortion pixel, sends to display module by described view data and shows.
10. the colour correcting apparatus of mobile terminal camera according to claim 7, is characterized in that, described image correction module comprises:
The second distortion pixel judging unit, rgb value for detection of each pixel in each frame image data, and calculate the difference between the rgb value of four the adjacent pixels in the rgb value of each pixel and this pixel upper and lower, left and right, if the difference of the rgb value of this pixel and adjacent four pixels is all over predetermined threshold, this pixel is color distortion pixel;
The second distortion pixel compensation unit, for calculating the mean value of rgb value of four neighbors in upper and lower, left and right of described color distortion pixel, and described mean value is set to the rgb value of described color distortion pixel.
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| CN106780480A (en) * | 2017-01-06 | 2017-05-31 | 惠州Tcl移动通信有限公司 | Automatic identification picture abnormal pixel processing method and system based on mobile terminal |
| CN109151317A (en) * | 2018-09-27 | 2019-01-04 | 惠州Tcl移动通信有限公司 | Mobile terminal camera image data processing method, mobile terminal and storage medium |
| CN110399754A (en) * | 2019-04-19 | 2019-11-01 | 泰州市朗嘉尚网络科技有限公司 | Automated information playback system |
| CN110399754B (en) * | 2019-04-19 | 2020-02-28 | 泰州市朗嘉尚网络科技有限公司 | Automated information reproduction system |
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