how to extract mean colour

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kash 2013-3-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/68094-how-to-extract-mean-colour

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

I have a image and code

http://imgur.com/qWf899i,9delUdX

    HSV = rgb2hsv(I);
    H = HSV(:,:,1); H = H(:);
    S = HSV(:,:,2); S = S(:);
    V = HSV(:,:,3); V = V(:);
    idx = kmeans([H S V], 3);
    cluster_idx=idx;
    pixel_labels = reshape(cluster_idx,size(I,1),size(I,2));
    figure,imshow(pixel_labels,[]), title('image labeled by cluster index');
    segmented_images = cell(1,3);
    rgb_label = repmat(pixel_labels,[1 1 3]);
    for k = 1:3
        color = I;
        color(rgb_label ~= k) = 0;
        segmented_images{k} = color;
    end
    figure,imshow(segmented_images{1}), title('objects in cluster 1');
    figure,imshow(segmented_images{2}), title('objects in cluster 2');
    figure,imshow(segmented_images{3}), title('objects in cluster 2');

for each segmented image i want to compute mean colur

plz assist

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Jan 2013-3-21

What is your question? What exactly is the "application of a color"?

kash 2013-3-21

My question is I have 3 segmented images ,for each segmented image,

segmented_images{1}),segmented_images{2}),segmented_images{3}),for these 3 images i have to apply different colours,i tried using

X=segmented_images{1});

X(:,:,1)=1

X(:,:,2)=0

X(:,:,3)=0,

but could not get colour on that segmented image,plz assist

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采纳的回答

Walter Roberson 2013-3-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/68094-how-to-extract-mean-colour#answer_79532

在 MATLAB Online 中打开

Z = zeros(size(pixel_labels));
T = double(pixel_labels == 1);
segmented_image{1} = cat(3, T, Z, Z);
T = double(pixel_labels == 2);
segmented_image{2} = cat(3, Z, T, Z);
T = double(pixel_labels == 3);
segmented_image{3} = cat(3, Z, Z, T);