MATLAB: How to select only the segmented region from a original image in MATLAB

Question

I need a little help.

I have a MATLAB code in which I've segment out an original image into multiple segments. Now I want to select only a specific segmented area and give it as an input to my function. I have attached my segmented image in which desired part is shown along with the black pixels. How do I select only the desired region, I don't want black pixels region.

Thanks,

for k = 1:max(max(l))
    color = img;
    color(rgb_label ~= k) = 0;
    segmented_images{k} = color;
    image = double(segmented_images{k})/255.0;
end

Answer 1

You could do,

S=regionprops(rgb_label,img,'Image')