Steve on Image Processing with MATLAB

Image processing concepts, algorithms, and MATLAB

Posts 501 - 510 of 597

Photoshop CS3 Extended – and MATLAB 8

[Here's a quick note for you, composed and delivered from the lovely confines of Boston's Logan International Airport. Don't worry, I'll get back to my connected components and upslope area topics... read more >>

Upslope area – Introduction 2

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 >>

Neighbor indexing 14

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 >>

Pad values in dilation and erosion 4

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 >>

New MATLAB Desktop Blog

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 >>

Connected component labeling – Part 3 37

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 >>

Computing distance using image file information 25

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 >>

Connected component labeling – Part 2 5

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 >>

What happened to isgray, isind, isbw, and isrgb? 13

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 >>

Connected component labeling – Part 1 9

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 >>

Posts 501 - 510 of 597

These postings are the author's and don't necessarily represent the opinions of MathWorks.