CN102567974A - Method and system for adjusting local color of image - Google Patents
Method and system for adjusting local color of image Download PDFInfo
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- CN102567974A CN102567974A CN2010106069483A CN201010606948A CN102567974A CN 102567974 A CN102567974 A CN 102567974A CN 2010106069483 A CN2010106069483 A CN 2010106069483A CN 201010606948 A CN201010606948 A CN 201010606948A CN 102567974 A CN102567974 A CN 102567974A
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Abstract
The invention relates to a method and system for adjusting local color of an image and belongs to the technical field of image processing. The method comprises the following steps: firstly, obtaining a to-be-adjusted color and an influence scope of color adjustment; calculating a diversity factor between a pixel point color of the color in the influence scope and the to-be-adjusted color; and calculating the adjustable amplitude of the pixel point color in the influence scope according to the influence scope and the diversity factor, and adjusting the local color of the image in the scope of the adjustable amplitude. According to the method provided by the invention, the to-be-adjusted color and the scope can be appointed by a user; the adjustable color is random, so that the user more clearly knows the adjusted color; and the adjusting scope can be set, so that the adjustment is more accurate.
Description
Technical field
The invention belongs to technical field of image processing, be specifically related to a kind of method and system of image local color adjustment.
Background technology
In Flame Image Process, often need adjust the color of the subregion of piece image.Adjustment image local field color is mainly carried out the adjustment of color based on primary colours at present.
Repair the figure personnel at present and do not change similar color, just must manual color region to be adjusted in the image be chosen adjustment again in order to adjust certain color.This old way inefficiency, and be easy to cause the rough problem of image.
And, have only 9 kinds of colors in the existing color method of adjustment, and the color space scope of every kind of color representative is very big, common factor is arranged each other, and its color space scope is indeterminate.This has just caused following defective:
The blindness of adjustment.Such as: adjustment is red, and the user knows that very which color belongs to red.Repair the figure personnel and can only want the color adjusted by experience adjustments.
The inaccuracy of setting range.Because the scope of adjustment is very big, may has influence on and not want the color value that changes.So when will accurately adjust certain color, repair the figure personnel and must manually choose with the constituency, again the selective color adjustment is carried out in the constituency with belonging to the zone that to adjust color.Inefficiency so not only, and owing to only carry out the color adjustment in inside, constituency, so be easy to cause the selection border transition unsmooth, produce the ladder effect, or change original characteristics of image.
Summary of the invention
To the defective that exists in the prior art, technical matters to be solved by this invention provides a kind of method of adjustment and system that color is accurate, adjust the image local color of back image smoothing that adjust.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is following:
A kind of method of adjustment of image local color may further comprise the steps:
(1) obtains the coverage of waiting to adjust color and color adjustment;
(2) pixel color and the said diversity factor of waiting adjust color of color in said coverage in the computed image;
(3), calculate the degree of amplitude modulation of the pixel color in said coverage, adjustment image local color in said degree of amplitude modulation scope according to said coverage and said diversity factor.
The method of adjustment of aforesaid image local color is waited to adjust the coverage of color and color adjustment and is confirmed through the numerical value in setpoint color space described in the step (1).
The method of adjustment of aforesaid image local color is waited to adjust the coverage of color and color adjustment and from image, is extracted described in the step (1).Leaching process is following particularly:
Wait to adjust from image and choose N pixel the color region, with the mean value of N pixel color as color to be adjusted, with the maximal value in N the pixel color value and minimum value respectively as the coverage bound of color adjustment.
The method of adjustment of aforesaid image local color, the computing method of diversity factor are following described in the step (2):
In the HSB color space, as heterochromia degree HD, the difference of saturation degree is as saturation difference degree SD with the difference of the said hue value of waiting to adjust the current pixel point color in color and the said coverage, and the difference of brightness is as luminance difference degree BD.
The method of adjustment of aforesaid image local color, the computing method of degree of amplitude modulation are described in the step (3): at first define a kind of monotonic decreasing function, said function is a parameter with said diversity factor; Go out to need the maximum adjustable amplitude of adjustment pixel then through said function calculation.
Said function is following:
lim＝255×exp[-8(h-h
0)
2/πH
2]×exp[-8(s-s
0)
2/πS
2]×exp[-8(b-b
0)
2/πB
2]
Wherein, lim representes the degree of amplitude modulation of current pixel point, and h representes current pixel point hue value, h
0Expression waits to adjust the color hue value, and s representes current pixel point saturation degree, s
0Represent color saturation to be adjusted, b representes current pixel point brightness, b
0Represent colour brightness to be adjusted; H, S, B are parameter;
When the coverage of waiting to adjust the adjustment of color and color was confirmed through the numerical value in setpoint color space, H ∈ (0,360) chose according to the coverage of form and aspect; S ∈ (0,100%) chooses according to the coverage of saturation degree; B ∈ (0,100%) chooses according to the coverage of brightness;
When the coverage of waiting to adjust the adjustment of color and color was extracted from image, the value of H, S, B was calculated through following formula:
H＝min[(h
max-h
0)，(h
0-h
min)]；
S＝min[(s
max-s
0)，(s
0-s
min)]；
B＝min[(b
max-b
0)，(b
0-b
min)]；
Wherein, h
Max, s
MaxAnd b
MaxThe maximal value of hue value, saturation degree and brightness in N the pixel of representing respectively to extract; h
Min, s
MinAnd b
MinThe minimum value of hue value, saturation degree and brightness in N the pixel of representing respectively to extract.
The method of adjustment of aforesaid image local color, wherein, the degree of amplitude modulation of pixel each passage of color in said coverage is following in the image:
[value of the value-X passage of X passage/255 * lim, the value of X passage+(value of 1-X passage/255) * lim];
Wherein, X passage is represented C-channel, M passage, Y passage and K passage.
The method of adjustment of aforesaid image local color also comprises the step that the coverage and the degree of amplitude modulation of color said to be adjusted, color adjustment are preserved into configuration file; Arbitrary image can read said configuration file, directly image is adjusted according to said configuration file.
A kind of Adjustment System of image local color comprises being used to obtain the deriving means of waiting to adjust color and color adjustment coverage;
Be used for the pixel color of computed image color in coverage and the diversity factor of waiting to adjust color, and, calculate the calculation element of the degree of amplitude modulation of the pixel color in coverage according to coverage and diversity factor;
The adjusting gear that is used for adjustment color of image in the degree of amplitude modulation scope.
The Adjustment System of aforesaid image local color, wherein, deriving means comprises and is used for extracting the extraction unit wait to adjust color and color adjustment coverage from image, and is used to be provided with the unit that is provided with of waiting to adjust coverage that color and color adjust.
The Adjustment System of aforesaid image local color also comprises the save set of the coverage and the degree of amplitude modulation of color to be adjusted, color adjustment being preserved into configuration file.
The method of the invention and system can be specified the color and the scope of desire adjustment by the user, and adjustable color is arbitrarily, like this user's more clear and more definite color of transferring just; And because the scope of adjustment can be provided with, so adjustment is more accurate.Because the present invention does color adjustment to integral image, and has done the related content that seamlessly transits, so, do not have that the adjustment result does not have rough phenomenon yet on the image of ladder a transitions smooth.
Description of drawings
Fig. 1 is the structured flowchart of the Adjustment System of image local color in the embodiment;
Fig. 2 is the process flow diagram of the method for adjustment of image local color in the embodiment.
Embodiment
Describe the present invention below in conjunction with embodiment and accompanying drawing.
Fig. 1 shows the structure of the Adjustment System of image local color in this embodiment.As shown in Figure 1, this system comprises deriving means 11, the calculation element 12 that is connected with deriving means 11, the adjusting gear 13 that is connected with calculation element 12, and the save set 14 that is connected with adjusting gear 13.Wherein, deriving means 11 comprises extraction unit 111 and unit 112 is set.
Deriving means 11 is used to obtain the coverage of waiting to adjust color and color adjustment.Waiting to adjust the coverage of color and color adjustment can extract from image through extraction unit 111, also can numerical value that wait to adjust each space of coverage that color and color adjust be set through unit 112 is set.
Adjusting gear 13 is used for adjustment image local color in the degree of amplitude modulation scope.
Save set 14 is used for color to be adjusted, coverage and degree of amplitude modulation are preserved into configuration file.Like this, all can read this configuration file adjustment image local color, directly reach required adjustment result arbitrary image.
Fig. 2 shows the method flow that adopts system shown in Figure 1 adjustment image local color.As shown in Figure 2, this method comprises the steps:
(1) deriving means 11 obtains the coverage of waiting to adjust color and color adjustment.The coverage of said color adjustment is meant that when adjustment is waited to adjust color the pixel color in much scopes is together adjustment also.
Wait that the coverage of adjusting color and color adjustment can be provided with through unit 112 is set on color space.For example, in the HSB color space, form and aspect, saturation degree and the brightness of waiting to adjust color can be set be respectively 30 degree, 50% and 30%.The coverage of form and aspect is 60 degree, and the coverage of saturation degree is 30%, and the coverage of brightness is 20%.Then the pixel of color in 30 degree ± 60 degree (form and aspect), 50% ± 30% (saturation degrees), 30% ± 20% (brightness) scope all needs adjustment.
Waiting to adjust the coverage of color and color adjustment can also extract from image through extraction unit 111.At first wait to adjust and choose N pixel the color region, in the N that a chooses pixel, find out color maximal value and minimum value then, and calculate the mean value of N pixel color from image.With the mean value of N pixel color as color to be adjusted, with the maximal value in N the pixel color value and minimum value respectively as the coverage bound of color adjustment.In this embodiment, N ∈ [1,100] promptly selects 1～100 pixel.
(2) pixel color and the said diversity factor of waiting adjust color of color in said coverage in calculation element 12 computed image.
Said diversity factor can be calculated through any formula that can express color vision difference in any color space.For example, the Euclidean distance of the HSB value in the HSB space:
Can also as vector representation be with the color distortion degree: D=((h-h
0), (s-s
0), (b-b
0)).
In this embodiment; Adopt following method to calculate the color distortion degree: in the HSB color space; With the difference of the hue value of waiting to adjust the current pixel point color in color and the coverage as heterochromia degree HD; The difference of saturation degree is as saturation difference degree SD, and the difference of brightness is as luminance difference degree BD.
(3) adjusting gear 13 calculates the degree of amplitude modulation of the pixel color in said coverage according to said coverage and said diversity factor, adjustment image local color in said degree of amplitude modulation scope.
The computing method of said degree of amplitude modulation are: at first define a kind of monotonic decreasing function, this function is parameter with the diversity factor; Go out to need the maximum adjustable amplitude of adjustment pixel then through this function calculation.In this embodiment, the monotonic decreasing function of definition is following:
lim＝255×exp[-8(h-h
0)
2/πH
2]×exp[-8(s-s
0)
2/πS
2]×exp[-8(b-b
0)
2/πB
2]
Wherein, lim representes the degree of amplitude modulation of current pixel point, and h representes current pixel point hue value, h
0Expression waits to adjust the hue value of color, and s representes the saturation degree of current pixel point, s
0Expression waits to adjust the saturation degree of color, and b representes the brightness of current pixel point, b
0Expression waits to adjust the brightness of color; H, S, B are parameter.
For H, S, B parameter, when the coverage of waiting to adjust the adjustment of color and color was confirmed through the numerical value in setpoint color space, this parameter was rule of thumb set by the user.Wherein, H ∈ (0,360) chooses according to the coverage of form and aspect; S ∈ (0,100%) chooses according to the coverage of saturation degree; B ∈ (0,100%) chooses according to the coverage of brightness.
When the coverage of waiting to adjust the adjustment of color and color was extracted from image, the value of H, S, B was calculated through following formula:
H＝min[(h
max-h
0)，(h
0-h
min)]；
S＝min[(s
max-s
0)，(s
0-s
min)]；
B＝min[(b
max-b
0)，(b
0-b
min)]；
Wherein, h
Max, s
MaxAnd b
MaxThe maximal value of hue value, saturation degree and brightness in N the pixel of representing respectively to extract; h
Min, s
MinAnd b
MinThe minimum value of hue value, saturation degree and brightness in N the pixel of representing respectively to extract.
The degree of amplitude modulation of pixel each passage of color in said coverage is following in the image:
The degree of amplitude modulation of C-channel is following interval: [value of the value-C-channel of C-channel/255 * lim, the value of C-channel+(value of 1-C passage/255) * lim].
The degree of amplitude modulation of M passage is following interval: [value/255 * lim of the value of M passage-M passage, the value of M passage+(value of 1-M passage/255) * lim].
The degree of amplitude modulation of Y passage is following interval: [value/255 * lim of the value of Y passage-Y passage, the value of Y passage+(value of 1-Y passage/255) * lim].
The degree of amplitude modulation of K passage is following interval: [value/255 * lim of the value of K passage-K passage, the value of K passage+(value of 1-K passage/255) * lim].
After image adjustment finished, can through save set 14 will color adjusted, the coverage of color adjustment preserves into configuration file with degree of amplitude modulation.Arbitrary image can read said configuration file, directly image is adjusted according to said configuration file.
The kind of adjustable color is arbitrarily among the present invention, is not limited to several kinds of limited colors.Color to be adjusted can be chosen in image, also can set through the color-values that the random color space is set.Wait that the coverage of adjusting color can set through the numerical value of any one color space, the for example hue value in HSB space, brightness value, intensity value, rather than fixing immutable.In order to make the adjustment result level and smooth, the present invention has adopted according to waiting to adjust the coverage of color and the adjusting range that the current pixel color value calculates, and this method that adjusting range is associated with setting range is to guarantee the smooth key of adjustment result.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technology thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. the method for adjustment of an image local color may further comprise the steps:
(1) obtains the coverage of waiting to adjust color and color adjustment;
(2) pixel color and the said diversity factor of waiting adjust color of color in said coverage in the computed image;
(3), calculate the degree of amplitude modulation of the pixel color in said coverage, adjustment image local color in said degree of amplitude modulation scope according to said coverage and said diversity factor.
2. the method for adjustment of image local color as claimed in claim 1 is characterized in that: the coverage of waiting to adjust the adjustment of color and color described in the step (1) is confirmed through the numerical value in setpoint color space.
3. the method for adjustment of image local color as claimed in claim 1 is characterized in that: the coverage of waiting to adjust the adjustment of color and color described in the step (1) is extracted from image.
4. the method for adjustment of image local color as claimed in claim 3 is characterized in that: said from image, to extract the process wait to adjust the coverage that color and color adjust following:
Wait to adjust from image and choose N pixel the color region, with the mean value of N pixel color as color to be adjusted, with the maximal value in N the pixel color value and minimum value respectively as the coverage bound of color adjustment.
5. the method for adjustment of image local color as claimed in claim 1 is characterized in that: the computing method of diversity factor are following described in the step (2):
In the HSB color space, as heterochromia degree HD, the difference of saturation degree is as saturation difference degree SD with the difference of the said hue value of waiting to adjust the current pixel point color in color and the said coverage, and the difference of brightness is as luminance difference degree BD.
6. like the method for adjustment of claim 2 or 4 described image local colors, it is characterized in that: the computing method of degree of amplitude modulation are described in the step (3): at first define a kind of monotonic decreasing function, said function is a parameter with said diversity factor; Go out to need the degree of amplitude modulation of adjustment pixel then through said function calculation.
7. the method for adjustment of image local color as claimed in claim 6 is characterized in that: said function is following:
lim＝255×exp[-8(h-h
0)
2/πH
2]×exp[-8(s-s
0)
2/πS
2]×exp[-8(b-b
0)
2/πB
2]
Wherein, lim representes the degree of amplitude modulation of current pixel point, and h representes current pixel point hue value, h
0Expression waits to adjust the color hue value, and s representes current pixel point saturation degree, s
0Represent color saturation to be adjusted, b representes current pixel point brightness, b
0Represent colour brightness to be adjusted; H, S, B are parameter;
When the coverage of waiting to adjust the adjustment of color and color was confirmed through the numerical value in setpoint color space, H ∈ (0,360) chose according to the coverage of form and aspect; S ∈ (0,100%) chooses according to the coverage of saturation degree; B ∈ (0,100%) chooses according to the coverage of brightness;
When the coverage of waiting to adjust the adjustment of color and color was extracted from image, the value of H, S, B was calculated through following formula:
H＝min[(h
max-h
0)，(h
0-h
min)]；
S＝min[(s
max-s
0)，(s
0-s
min)]；
B＝min[(b
max-b
0)，(b
0-b
min)]；
Wherein, h
Max, s
MaxAnd b
MaxThe maximal value of hue value, saturation degree and brightness in N the pixel of representing respectively to extract; h
Min, s
MinAnd b
MinThe minimum value of hue value, saturation degree and brightness in N the pixel of representing respectively to extract.
8. the method for adjustment of image local color as claimed in claim 7 is characterized in that: the degree of amplitude modulation of pixel each passage of color in said coverage is following in the image:
[value of the value-X passage of X passage/255 * lim, the value of X passage+(value of 1-X passage/255) * lim];
Wherein, X passage is represented C-channel, M passage, Y passage and K passage.
9. the method for adjustment of image local color as claimed in claim 1 is characterized in that: said method also comprises the step that the coverage and the degree of amplitude modulation of color said to be adjusted, color adjustment are preserved into configuration file; Arbitrary image can read said configuration file, directly image is adjusted according to said configuration file.
10. the Adjustment System of an image local color comprises being used to obtain the deriving means (11) of waiting to adjust color and color adjustment coverage;
Be used for the pixel color of computed image color in coverage and the diversity factor of waiting to adjust color, and, calculate the calculation element (12) of the degree of amplitude modulation of the pixel color in coverage according to coverage and diversity factor;
The adjusting gear (13) that is used for adjustment color of image in the degree of amplitude modulation scope.
11. the Adjustment System of image local color as claimed in claim 10; It is characterized in that: said deriving means (11) comprises and is used for extracting the extraction unit (111) wait to adjust color and color adjustment coverage from image, and be used to be provided with wait to adjust coverage that color and color adjust unit (112) is set.
12. the Adjustment System like claim 10 or 11 described image local colors is characterized in that: said system also comprises the save set (15) of the coverage and the degree of amplitude modulation of color to be adjusted, color adjustment being preserved into configuration file.
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| CN2010106069483A CN102567974A (en) | 2010-12-16 | 2010-12-16 | Method and system for adjusting local color of image |
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| CN2010106069483A CN102567974A (en) | 2010-12-16 | 2010-12-16 | Method and system for adjusting local color of image |
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| CN104851114A (en) * | 2015-04-24 | 2015-08-19 | 广东欧珀移动通信有限公司 | Method for partial color changing of image, and terminal |
| CN105488819A (en) * | 2015-12-04 | 2016-04-13 | 小米科技有限责任公司 | Color template generation method and device and image processing method and device |
| CN107257454A (en) * | 2017-06-29 | 2017-10-17 | 青岛海信电器股份有限公司 | A kind of method, device and the display device of image color skew |
| CN107613280A (en) * | 2016-07-12 | 2018-01-19 | 中兴通讯股份有限公司 | A kind of projected picture method of adjustment, device and projection terminal |
| CN108198123A (en) * | 2017-12-28 | 2018-06-22 | 上海传英信息技术有限公司 | Watermark embedding method and terminal |
| CN109819228A (en) * | 2017-11-21 | 2019-05-28 | 瑞昱半导体股份有限公司 | Wrong color removing method |
| CN110689488A (en) * | 2019-08-22 | 2020-01-14 | 稿定（厦门）科技有限公司 | Image toning method, medium, device and apparatus |
| CN110855958A (en) * | 2019-11-18 | 2020-02-28 | RealMe重庆移动通信有限公司 | Image adjusting method and device, electronic equipment and storage medium |
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| CN104090764A (en) * | 2014-07-15 | 2014-10-08 | 深圳市金立通信设备有限公司 | Terminal |
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| CN104851114A (en) * | 2015-04-24 | 2015-08-19 | 广东欧珀移动通信有限公司 | Method for partial color changing of image, and terminal |
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| CN105488819A (en) * | 2015-12-04 | 2016-04-13 | 小米科技有限责任公司 | Color template generation method and device and image processing method and device |
| CN107613280A (en) * | 2016-07-12 | 2018-01-19 | 中兴通讯股份有限公司 | A kind of projected picture method of adjustment, device and projection terminal |
| CN107257454A (en) * | 2017-06-29 | 2017-10-17 | 青岛海信电器股份有限公司 | A kind of method, device and the display device of image color skew |
| CN109819228A (en) * | 2017-11-21 | 2019-05-28 | 瑞昱半导体股份有限公司 | Wrong color removing method |
| CN109819228B (en) * | 2017-11-21 | 2021-03-19 | 瑞昱半导体股份有限公司 | Color-shifting method |
| CN108198123A (en) * | 2017-12-28 | 2018-06-22 | 上海传英信息技术有限公司 | Watermark embedding method and terminal |
| CN110689488A (en) * | 2019-08-22 | 2020-01-14 | 稿定（厦门）科技有限公司 | Image toning method, medium, device and apparatus |
| CN110689488B (en) * | 2019-08-22 | 2022-03-04 | 稿定（厦门）科技有限公司 | Image toning method, medium, device and apparatus |
| CN110855958A (en) * | 2019-11-18 | 2020-02-28 | RealMe重庆移动通信有限公司 | Image adjusting method and device, electronic equipment and storage medium |
| CN110855958B (en) * | 2019-11-18 | 2022-04-26 | RealMe重庆移动通信有限公司 | Image adjusting method and device, electronic equipment and storage medium |
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