How to convert an image from 3d to 2d?
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I got following error while processing it.
Error using ==> iptcheckinput Function HISTEQ expected its first input, I, to be two-dimensional.
Error in ==> histeq at 71
iptcheckinput(a,{'uint8','uint16','double','int16','single'}, ...
Error in ==> Project_Stage_1 at 9
I2 = histeq(f); %improve contrast
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Answers (1)
Image Analyst
on 1 Nov 2012
You can't do it on a color image. You can do it on each color channel, one at a time,
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
or convert to hsv colorspace
% Extract the individual red, green, and blue color channels.
hsv = rgb2hsv(rgbImage);
hChannel = hsv (:, :, 1);
sChannel = hsv (:, :, 2);
vChannel = hsv (:, :, 3);
and do it on the v channel - this is the best way and it avoids severe color artifacts like you'll have doing it in RGB space.
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