MATLAB: Segmentaion of dermoscopy image

Question

how to segment dermoscopy image by adaptive thresholding(AT)? can you share a code

Answer 1

Take the blue channel and threshold it to select dark things:

binaryImage = rgbImage(:,:,3) < 150; % Or whatever threshold works.

Then call bwareafilt() to take the largest blob

binaryImage = bwareafilt(binaryImage, 1);