color image processing code...

[Anitha Christobel]

use an image with red, green and blue colors in it..



PROGRAM :
clc;
close all;
rgbImage = imread('C:\Users\Anitha\Desktop\matlab pgms\dice.png');
subplot(3, 4, 1);
imshow(rgbImage);
title('Original RGB Image');
set(gcf, 'Position', get(0, 'ScreenSize'));
redBand = rgbImage(:,:, 1);
greenBand = rgbImage(:,:, 2);
blueBand = rgbImage(:,:, 3);
subplot(3, 4, 2);
imshow(redBand);
title('Red band');
subplot(3, 4, 3);
imshow(greenBand);
title('Green band');
subplot(3, 4, 4);
imshow(blueBand);
title('Blue Band');
redthreshold = 68;
greenThreshold = 70;
blueThreshold = 72;
redMask = (redBand > redthreshold);
greenMask = (greenBand < greenThreshold);
blueMask = (blueBand < blueThreshold);
subplot(3, 4, 6);
imshow(redMask, []);
title('Red Mask');
subplot(3, 4, 7);
imshow(greenMask, []);
title('Green Mask');
subplot(3, 4, 8);
imshow(blueMask, []);
title('Blue Mask');
redObjectsMask = uint8(redMask & greenMask & blueMask);
subplot(3, 4, 9);
imshow(redObjectsMask, []);
title('Red Objects Mask');
maskedrgbImage = uint8(zeros(size(redObjectsMask))); % Initialize
maskedrgbImage(:,:,1) = rgbImage(:,:,1) .* redObjectsMask;
maskedrgbImage(:,:,2) = rgbImage(:,:,2) .* redObjectsMask;
maskedrgbImage(:,:,3) = rgbImage(:,:,3) .* redObjectsMask;
subplot(3, 4, 10);
imshow(maskedrgbImage);
title('Masked Original Image');