Replacing pixel value a another colour

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FIR on 6 Dec 2012
I have a image in that suppose i want to change the pixel colour ,how i can do it.assume i have peppers image,in that if i want to replace a pixel value say 5 by yellow colour or some other colour,please tell how to proceed
please asist

Answers (1)

Image Analyst
Image Analyst on 6 Dec 2012
5 in which color channel and which color space? In general it's
rgbImage(row, column, 1) = 255;
rgbImage(row, column, 2) = 255;
rgbImage(row, column, 3) = 0;
for yellow (though I suspect you knew this already). If you have a mask (a binary image of where the 5's occur), it's somewhat different.
FIR on 8 Dec 2012
Yes i got that image that image using
my code is
cform = makecform('srgb2lab');
lab = applycform(rgbBlock, cform);
L_channel = lab(:,:,1);
A_channel = lab(:,:,2);
B_channel = lab(:,:,3);
L_channelNew = 100 - L_channel;
A_channelNew = 255-A_channel;
labNew = cat(3, L_channelNew, A_channelNew, B_channel);
cform2 = makecform('lab2srgb');
rgbNew = applycform(labNew,cform2);
i have attached a image below is it possible to give different colour for different objects
in this
i want to give different colour for fifferent objects ,say for green one colour ,brown one colour,others another colur,i tried with above code,but did not get actual result
plz assist

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