Extract label colors from label2rgb

Question

Veena Chatti 2020-10-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/605496-extract-label-colors-from-label2rgb

编辑： Veena Chatti 2020-10-6

采纳的回答： Veena Chatti

在 MATLAB Online 中打开

Hi!

I'm using label2rgb to label ~200-250 objects with watershed.

Here is my code:

labeledL = label2rgb(L,'turbo', [1 1 1], 'shuffle');

How can I extract the specific colors that were assigned to each object by the watershed? The aim is to get a 250x4 double that contains this information, with one column being the labels, and the three other columns containing the corresponding color values.

I would greatly appreciate your tips! Thanks!

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Answer 1

Veena Chatti 2020-10-6

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/605496-extract-label-colors-from-label2rgb#answer_506346

编辑：Veena Chatti 2020-10-6

在 MATLAB Online 中打开

I figured out one way:

colors = NaN(max(LL(:)),4); 
for i = 1:max(LL(:)) % LL is my labelmatrix
    [r,c] = find(LL==i,1)
    colors(i,1) = i;
    colors(i,2) = RGB(r,c,1) % RGB contains the colors generated by 'turbo' and 'shuffle'
    colors(i,3) = RGB(r,c,2)
    colors(i,4) = RGB(r,c,3)
end