A long time ago, blog reader Brendon asked me if I knew of a way to compute something called upslope area in MATLAB. I responded that I had never heard of that before. Brendan explained that it was... read more >>

In response to my last post about connected component labeling algorithms, blog reader JanKees wanted to know how to find neighboring pixel pairs programmatically. Prompted by this question, I... read more >>

Blog reader DKS asked recently why values outside the image are assumed to be -Inf when computing dilation. I thought this issue was worth exploring further because it has practical... read more >>

This is just quick note to tell everyone about the newest MATLAB Central blog. When you get a chance, check out Inside the MATLAB... read more >>

Let's start looking at connected component labeling algorithms. In this post I want to explain how you can think of pixel neighborhood relationships in terms of a graph. We'll look at... read more >>

Patrick asked for an example on how to compute distances between objects based on resolution information stored in a file. The TIFF format
is one that can store resolution information, and the... read more >>

In this series I'm discussing different ways to compute the connected components of a binary image. Before I get into specific
algorithms, though, I need to touch briefly on the notion of... read more >>

In a blog comment recently, Rob asked about what happened to isrgb. When you run this function, it issues a warning about being obsolete. Rob asked "What were the toolbox developers... read more >>

Several people have asked recently about how bwlabel works, so I plan to write about it here during the next several weeks.
bwlabel implements an operation known as connected component labeling, or... read more >>

As Loren posted yesterday in her Art of MATLAB blog, the R2007a release is available. Readers of this blog might be interested in the minor upgrades the Image Processing Toolbox, the Image... read more >>