In following code instead of using rgb2lab i have to use srgb2lab, i am getting error?

e = imread('peppers.png'); lab_he = rgb2lab(he);

ab = lab_he(:,:,2:3); nrows = size(ab,1); ncols = size(ab,2); ab = reshape(ab,nrows*ncols,2);

nColors = 3; % repeat the clustering 3 times to avoid local minima [cluster_idx, cluster_center] = kmeans(ab,nColors,'distance','sqEuclidean','Replicates',3);

pixel_labels = reshape(cluster_idx,nrows,ncols); figure,imshow(pixel_labels,[]), title('image labeled by cluster index');

[Stephen23]

@jayamala pakhare: please show us the complete error message. This means all of the red text.

Answer 1

[Image Analyst]

You read the image into "e" instead of "he". This works for me:

Try this improved code:

% Read in original color image.
rgbImage = imread('peppers.png'); 
subplot(1, 2, 1);
imshow(rgbImage);
title('Original RGB Image', 'FontSize', 18);
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0, 0.04, 1, 0.96]);

% Convert to LAB color space.
labImage = rgb2lab(rgbImage);

ab = labImage(:,:,2:3); 
nrows = size(ab,1); 
ncols = size(ab,2); 
ab = reshape(ab,nrows*ncols,2);

numberOfClasses = 3; % Tell it we want only 3 color classes.
% Set Replicates = 3 to repeat the clustering 3 times to avoid local minima.
[cluster_indexes, cluster_centers] = kmeans(ab, numberOfClasses, 'distance','sqEuclidean','Replicates',3);
% Reshape back into 2-D image.
pixel_labels = reshape(cluster_indexes,nrows,ncols); 
subplot(1, 2, 2);
imshow(pixel_labels,[]) 
title('Classified Image as labeled by kmeans()', 'FontSize', 18);

[jayamala pakhare]

thank u for your response