RGB to opponent color space code

HI ALL,
Did any one guide me to find function for RGB to opponent color space that mentioned in the attached paper and link to paper RGB to opponent color space code : to

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Anand
Anand 2014-2-24
编辑:Anand 2014-2-24
From what I can tell, this should do it:
%load RGB image
im = im2double(imread('peppers.png'));
%extract each channel
R = im(:,:,1);
G = im(:,:,2);
B = im(:,:,3);
%convert to opponent space
O1 = (R-G)./sqrt(2);
O2 = (R+G-2*B)./sqrt(6);
O3 = (R+G+B)./sqrt(3);

6 个评论

Thank you very much,please could you provide me the paper or web site that you used for coding that converting,for I used it as a reference?
I used the code but I get this error
Error: File: RGB_to_oppent.m Line: 9 Column: 12 Unexpected MATLAB expression. at this line
O2 = (R+G-2B)./sqrt(6);
Then,I tried this correction
O2 = (R+G-2.*B)./sqrt(6);
is that correct?
Yes, thats right.
Thank you very much,please could you provide me the paper or web site that you used for coding the RGB to opponent color space?
MR. Anand:I am waiting your answer,thank you.

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更多回答(3 个)

Image Analyst
Image Analyst 2014-2-24

1 个投票

All that is not built into MATLAB, but MATLAB includes the lower level functions for you to build that capability yourself , particularly in the Image Processing Toolbox and the Computer Vision System Toolbox.
Image Analyst
Image Analyst 2014-2-24

1 个投票

There are lots of color spaces you could use. Here are formulas for some of them: http://www.easyrgb.com/index.php?X=MATH
hamed abdulaziz
hamed abdulaziz 2014-2-24

0 个投票

THANKS, I FOUND THIS EQUATION IN THIS LECTURE,PLEASE COULD YOU GUIDE ME TO CODE THEM
AND THIS LECTURE

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