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how to label each object in an image using 8 conncetivity

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Image Analyst
Image Analyst on 3 Mar 2019
Use bwlabel
labeledImage = bwlabel(binaryImage);
Image Analyst
Image Analyst on 3 Mar 2019
Try this:
% Let's assign each blob a different color to visually show the user the distinct blobs.
coloredLabels = label2rgb (labeledImage, 'hsv', 'k', 'shuffle'); % pseudo random color labels
% coloredLabels is an RGB image. We could have applied a colormap instead (but only with R2014b and later)
axis image; % Make sure image is not artificially stretched because of screen's aspect ratio.
caption = sprintf('Pseudo colored labels, from label2rgb().\nBlobs are numbered from top to bottom, then from left to right.');
title(caption, 'FontSize', 12);

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