Method for independently controlling hue or saturation of individual colors in a real time digital video image

DC CAFC

US 6,724,435 B2
Filed: 08/06/2001
Issued: 04/20/2004
Est. Priority Date: 08/06/2001
Status: Expired due to Term

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1. A method for independently controlling hue or saturation of individual colors in a real time digital video image, comprising the steps of:

(a) receiving and characterizing the real time digital video input image featuring input image pixels;

(b) selecting to independently change the hue or the saturation of an individual color in the real time digital video input image, by selecting an independent color hue control delta value or an independent color saturation control delta value, respectively, wherein said independent color hue control delta value represents an extent of change in the hue of said selected individual color and wherein said independent color saturation control delta value represents an extent of change in the saturation of said selected individual color;

(c) identifying a plurality of said input image pixels having said selected individual color in the real time digital video input image with the hue or the saturation selected to be independently changed, by performing arithmetic and logical operations using input image pixel values of each said input image pixel of the real time digital video input image;

(d) determining corresponding output image pixel values for each of said plurality of said input image pixels identified as having said selected individual color in the real time digital video input image with the hue or the saturation selected to be independently changed, by separately evaluating independent color hue control functions or independent color saturation control functions, respectively, using said input image pixel values of said plurality of said input image pixels, and using corresponding said selected independent color hue control delta value or said corresponding selected independent color saturation control delta value, for forming a corresponding plurality of output image pixels having said selected individual color with the hue or the saturation selected to be independently changed; and

(e) displaying a real time digital video output image including said corresponding plurality of said output image pixels having said selected individual color with the hue or the saturation selected to be independently changed in the real time digital video input image, whereby the hue or the saturation of said selected individual color in the real time digital video input image has been changed without affecting the hue or the saturation of any other individual color in the real time digital video input image.

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Abstract

A method for independently controlling hue or saturation of individual colors in a real time digital video image, without affecting the hue or saturation of any other color in the same real time digital video image. Includes selecting a uniquely defined independent color hue control delta value or independent color saturation control delta value, where the delta value represents an extent or magnitude of change in hue or saturation, respectively, of the selected individual color, and, separately evaluating uniquely defined independent color hue control functions or independent color saturation control functions, using input image pixel values of the plurality of input image pixels identified as having the individual color in the real time digital video input image whose hue or saturation was selected to be independently changed, and using the corresponding selected independent color hue control delta value or the corresponding selected independent color saturation control delta value, respectively, for forming and displaying a corresponding plurality of output image pixels having the individual color whose hue or saturation was selected to be independently changed.

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32 Claims

1. A method for independently controlling hue or saturation of individual colors in a real time digital video image, comprising the steps of:
- (a) receiving and characterizing the real time digital video input image featuring input image pixels;
  
  (b) selecting to independently change the hue or the saturation of an individual color in the real time digital video input image, by selecting an independent color hue control delta value or an independent color saturation control delta value, respectively, wherein said independent color hue control delta value represents an extent of change in the hue of said selected individual color and wherein said independent color saturation control delta value represents an extent of change in the saturation of said selected individual color;
  
  (c) identifying a plurality of said input image pixels having said selected individual color in the real time digital video input image with the hue or the saturation selected to be independently changed, by performing arithmetic and logical operations using input image pixel values of each said input image pixel of the real time digital video input image;
  
  (d) determining corresponding output image pixel values for each of said plurality of said input image pixels identified as having said selected individual color in the real time digital video input image with the hue or the saturation selected to be independently changed, by separately evaluating independent color hue control functions or independent color saturation control functions, respectively, using said input image pixel values of said plurality of said input image pixels, and using corresponding said selected independent color hue control delta value or said corresponding selected independent color saturation control delta value, for forming a corresponding plurality of output image pixels having said selected individual color with the hue or the saturation selected to be independently changed; and
  
  (e) displaying a real time digital video output image including said corresponding plurality of said output image pixels having said selected individual color with the hue or the saturation selected to be independently changed in the real time digital video input image, whereby the hue or the saturation of said selected individual color in the real time digital video input image has been changed without affecting the hue or the saturation of any other individual color in the real time digital video input image.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- - 2. The method of claim 1, whereby the real time digital video input image is of a format selected from the group consisting of RGB format, YCrCb format, and, YUV format, whereby the individual colors of one said format can be characterized by the individual colors of a second said format by using appropriate linear transformations between said formats.
  - 3. The method of claim 1, whereby the real time digital video input image features basic colors red, green, and blue, and, complementary colors yellow, cyan, and magenta, in RGB color space, whereby values of said complementary colors are expressed in terms of and evaluated from linear combinations of values of said basic colors.
  - 4. The method of claim 1, whereby the real time digital video input image features basic colors yellow, cyan, and magenta, and, complementary colors red, green, and blue, in YCM color space, whereby values of said complementary colors are expressed in terms of and evaluated from linear combinations of values of said basic colors.
  - 5. The method of claim 1, whereby in step (b), numerical range of said independent color hue control delta value and numerical range of said independent color saturation control delta value corresponds to an arbitrary interval of integers.
  - 6. The method of claim 1, whereby in step (b), numerical range of said independent color hue control delta value is an interval between −
    - 1 and +1.
  - 7. The method of claim 1, whereby in step (b), numerical range of said independent color saturation control delta value is an interval between −
    - 1 and +1.
  - 8. The method of claim 1, whereby said independent color hue control delta value is completely independent and separate from said independent color saturation control delta value.
  - 9. The method of claim 1, whereby said independent color saturation control delta value is completely independent and separate from said independent color hue control delta value.
  - 10. The method of claim 1, whereby in step (b), said extent of change in the hue of said selected individual color is selected from the group consisting of a clockwise change and a counterclockwise change, of an angle of said selected individual color towards other individual colors characterized in a color space featuring a color based three-dimensional coordinate system.
  - 11. The method of claim 1, whereby in step (b), said extent of change in the saturation of said selected individual color is selected from the group consisting of an increase and a decrease, of intensity of said individual color characterized in a color space featuring a color based three-dimensional coordinate system.
  - 12. The method of claim 1, whereby in step (c) said arithmetic and logical operations are selected from the group consisting of addition, subtraction, multiplication, division, equal to, greater than, less than, absolute value of, and, combinations thereof.
  - 13. The method of claim 1, whereby step (d) is performed following said identifying each said input image pixel, one at a time, of said plurality of said input image pixels, or, is performed following said identifying entire said plurality of said input image pixels, as having said individual color in the digital video input image whose hue or saturation was selected to be independently changed.
  - 14. The method of claim 1, whereby in step (d), for independently controlling the hue of said selected individual color in the real time digital video image, said independent color hue control function is a function of said input image pixel values of said plurality of said input image pixels and of said corresponding selected independent color hue control delta value.
  - 15. The method of claim 1, whereby in step (d), for independently controlling the saturation of said selected individual color in the real time digital video image, said independent color saturation control function is a function of said input image pixel values of said plurality of said input image pixels and of said corresponding selected independent color saturation control delta value.
  - 16. The method of claim 1, whereby step (e) is performed following said determining said output image pixel values for each said input image pixel, one at a time, of said plurality of said input image pixels, or, is performed following said determining said output image pixel values for entire said plurality of said input image pixels, identified as having said individual color in the real time digital video input image whose hue or saturation was selected to be independently changed.

17. A system for independently controlling hue or saturation of individual colors in a real time digital video image, comprising:
- (a) a real time digital video image display device displaying the real time digital video image featuring input image pixels;
  
  (b) a master control device in operative electronic communication with and controlling said real time digital video image display device; and
  
  (c) a viewer of said real time digital video image display device operating said master control device for selecting to independently change the hue or the saturation of an individual color in the real time digital video input image, by selecting an independent color hue control delta value or an independent color saturation control delta value featured on said master control device, respectively, wherein said independent color hue control delta value represents an extent of change in the hue of said selected individual color and wherein said independent color saturation control delta value represents an extent of change in the saturation of said selected individual color, whereby said real time digital video image display device in said operative electronic communication with said master control device performs steps including;
  
  (i) identifying a plurality of said input image pixels having said selected individual color in the real time digital video input image with the hue or the saturation selected to be independently changed, by performing arithmetic and logical operations using input image pixel values of each said input image pixel of the real time digital video input image;
  
  (ii) determining corresponding output image pixel values for each of said plurality of said input image pixels identified as having said selected individual color in the real time digital video input image with the hue or the saturation selected to be independently changed, by separately evaluating independent color hue control functions or independent color saturation control functions, respectively, using said input image pixel values of said plurality of said input image pixels, and using corresponding said selected independent color hue control delta value or said corresponding selected independent color saturation control delta value, for forming a corresponding plurality of output image pixels having said selected individual color with the hue or the saturation selected to be independently changed; and
  
  (iii) displaying a real time digital video output image including said corresponding plurality of said output image pixels having said selected individual color with the hue or the saturation selected to be independently changed in the real time digital video input image, whereby the hue or the saturation of said selected individual color in the real time digital video input image has been changed without affecting the hue or the saturation of any other individual color in the real time digital video input image.
- View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
- - 18. The system of claim 17, whereby the real time digital video input image is of a format selected from the group consisting of RGB format, YCrCb format, and, YUV format, whereby the individual colors of one said format can be characterized by the individual colors of a second said format by using appropriate linear transformations between said formats.
  - 19. The system of claim 17, whereby the real time digital video input image features basic colors red, green, and blue, and, complementary colors yellow, cyan, and magenta, in RGB color space, whereby values of said complementary colors are expressed in terms of and evaluated from linear combinations of values of said basic colors.
  - 20. The system of claim 17, whereby the real time digital video input image features basic colors yellow, cyan, and magenta, and, complementary colors red, green, and blue, in YCM color space, whereby values of said complementary colors are expressed in terms of and evaluated from linear combinations of values of said basic colors.
  - 21. The system of claim 17, whereby numerical range of said independent color hue control delta value and numerical range of said independent color saturation control delta value corresponds to an arbitrary interval of integers.
  - 22. The system of claim 17, whereby numerical range of said independent color hue control delta value is an interval between −
    - 1 and +1.
  - 23. The system of claim 17, whereby numerical range of said independent color saturation control delta value is an interval between −
    - 1 and +1.
  - 24. The system of claim 17, whereby said independent color hue control delta value is completely independent and separate from said independent color saturation control delta value.
  - 25. The system of claim 17, whereby said independent color saturation control delta value is completely independent and separate from said independent color hue control delta value.
  - 26. The system of claim 17, whereby said extent of change in the hue of said selected individual color is selected from the group consisting of a clockwise change and a counterclockwise change, of an angle of said selected individual color towards other individual colors characterized in a color space featuring a color based three-dimensional coordinate system.
  - 27. The system of claim 17, whereby said extent of change in the saturation of said selected individual color is selected from the group consisting of an increase and a decrease, of intensity of said individual color characterized in a color space featuring a color based three-dimensional coordinate system.
  - 28. The system of claim 17, whereby in step (i), said arithmetic and logical operations are selected from the group consisting of addition, subtraction, multiplication, division, equal to, greater than, less than, absolute value of, and, combinations thereof.
  - 29. The system of claim 17, whereby step (ii) is performed following said identifying each said input image pixel, one at a time, of said plurality of said input image pixels, or, is performed following said identifying entire said plurality of said input image pixels, as having said individual color in the digital video input image whose hue or saturation was selected to be independently changed.
  - 30. The system of claim 17, whereby in step (ii), for independently controlling the hue of said selected individual color in the real time digital video image, said independent color hue control function is a function of said input image pixel values of said plurality of said input image pixels and of said corresponding selected independent color hue control delta value.
  - 31. The system of claim 17, whereby in step (ii), for independently controlling the saturation of said selected individual color in the real time digital video image, said independent color saturation control function is a function of said input image pixel values of said plurality of said input image pixels and of said corresponding selected independent color saturation control delta value.
  - 32. The system of claim 17, whereby step (iii) is performed following said determining said output image pixel values for each said input image pixel, one at a time, of said plurality of said input image pixels, or, is performed following said determining said output image pixel values for entire said plurality of said input image pixels, identified as having said individual color in the real time digital video input image whose hue or saturation was selected to be independently changed.

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Current Assignee
Lone Star Technological Innovations, LLC (TGT Enterprises, LLC)
Original Assignee
Oplus Technologies Ltd. (Intel Corporation)
Inventors
Segman, Yosef
Primary Examiner(s)
Lee, Michael H.
Assistant Examiner(s)
Natnael, Paulos M.

Application Number

US09/922,164
Publication Number

US 20030025835A1
Time in Patent Office

988 Days
Field of Search

348/576-577, 348/649, 348/650, 348/651, 348/687, 348/673, 348/679, 348/703, 348/582, 386/4, 386/52, 386/113, 386/114, 358/520, 358/523, 358/518, 382/165, 382/168
US Class Current

348/576
CPC Class Codes

H04N 9/643 Hue control means, e.g. fle...

H04N 9/68 for controlling the amplitu...

Method for independently controlling hue or saturation of individual colors in a real time digital video image

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Abstract

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32 Claims

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Method for independently controlling hue or saturation of individual colors in a real time digital video image

First Claim

2 Assignments

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Abstract

49 Citations

32 Claims

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