How to apply thinning algorithm to color image

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Hi, is there any possible way to apply thinning algorithm to a color image. Exactly like the one I attached. I want to get single line drawing from the color image
Thank you

Answers (1)

Image Analyst
Image Analyst on 16 Apr 2014
Try this for starters:
redChannel = rgbImage(:,:,1);
% Threshold (binarize) the red channel.
binaryImage = redChannel < 227; % Use triangle method to get the # automatically.
% Take largest blob. See attached demo. Then...
thinnedImage = bwmorph(binaryImage, 'skel', inf);
Adapt as necessary.
  3 Comments
missC
missC on 16 Apr 2014
Now I got it sir. But how to preserve the color and the intensity of the image without convert to binary image? Or in other words thinned color/intensity image
Thanks.
Image Analyst
Image Analyst on 16 Apr 2014
You can't. It needs to be binary if you're going to skeletonize. After skeletonization you can convert to color if you want:
black = zeros(size(binaryImage), 'uint8');
rgbImage = cat(2, black, black, uint8(binaryImage));
Weight the components if you want a different color.

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