How to apply thinning algorithm to color image

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

Answer 1

[Image Analyst]

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.

[missC]

Thanks for the reply Image Analyst. I am not sure how can I apply with my image even i have tried and run your Blob demo. Excuse of my shallow knowledge sir

[missC]

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]

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.