I started writing a post today about the ConvexImage property returned by regionprops. But I got sidetracked along the way, and this post turned into a description of how to overlay a pixel grid... read more >>

I'm back to looking at M&Ms today. (Previous posts: 17-Dec-2010, 23-Dec-2010, 30-Dec-2010, 11-Jan-2011) url = 'https://blogs.mathworks.com/images/steve/2010/mms.jpg'; rgb =... read more >>

Today I return to examining this picture of M&Ms:url = 'https://blogs.mathworks.com/images/steve/2010/mms.jpg'; rgb = imread(url); imshow(rgb) Previously I showed how to convert pixel... read more >>

I'm going to take a break from looking at M&Ms this week and instead consider a question that Richard asked yesterday: "I have two binary images of the same size. I want to select... read more >>

Last week I showed this picture of M&Ms on my desk, and I used it to raise some vague questions about the definition of the color green. Today I'll use this picture as an opportunity... read more >>

"Why do you have M&Ms on your desk?" my friend Nausheen wanted to know. Well, the truth is, for playing around with color images, M&Ms are simply irresistable. url =... read more >>

I'd like to introduce Brett Shoelson as guest blogger for today. Many of you already know Brett from his work on the File Exchange Pick of the Week blog, or his posts on the... read more >>

A reader asked in a blog comment recently why a vertical line (or edge) shows up in the Fourier transform of an image as a horizontal line. I thought I would try to explain this using the... read more >>

In a recent post I demonstrated the use of bwdist (binary image Euclidean distance transform) to perform isotropic dilation. This was inspired by something that Brett asked me about. ... read more >>

Brett recently asked me about an image processing problem. One step in the problem involved finding out which pixels are within a certain distance of the foreground in a binary image. We... read more >>