what is an R-B feature image,how to convert an RGB image to R-B feature image? ,plase give code in matlab?

what is an R-B feature image,how to convert an RGB image to R-B feature image? ,plase give code in matlab?

Answer 1

[Image Analyst]

% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
redMinusBlue = double(radChannel) - double(blueChannel);
imshow(redMinusBlue, []);

[shamili]

thanku for this answer but it is giving that "Undefined function 'rgbImage' for input arguments of type 'char'.

[shamili]

yaahh its working...thanq very much.