I'd like to welcome back guest blogger Spandan Tiwari for today's post. Spandan, a developer on the Image Processing Toolbox team, posted here previously about circle finding and homomorphic filtering.... 続きを読む >>

A support call came in this week from a customer trying to use watershed to segment this image: The complaint was that calling watershed did not produce a good segmentation.Today I want to show how... 続きを読む >>

Earlier this week I wrote about the lists I keep of MATLAB and Image Processing Toolbox changes that might be relevant to the material in Digital Image Processing Using MATLAB. I've been keeping... 続きを読む >>

Today is the final post in my continental divide series. In earlier posts I have used the problem of computing the US continental divide as a vehicle for exploring data import, image... 続きを読む >>

Today's post in my continental divide series demonstrates the final computational step and shows one procedure for visualizing the Pacific and Atlantic catchment basins. In my previous... 続きを読む >>

This post is the second in my series on computing the location of the US continental divide. Today I'm going to look at the watershed transform, including how to compute and visualize it... 続きを読む >>

Every so often someone asks in comp.soft-sys.matlab for a "function like Image Processing Toolbox function foobar that works in 3-D." If I happen to see the post, I will follow up, explaining... 続きを読む >>

The notion of neighbor connectivity is discussed in most image processing textbooks. Specifically, what is the set of neighbors of a pixel? For example, a commonly-used neighborhood... 続きを読む >>

In image processing textbooks, you often see low-level image processing operations grouped into two categories: Point processes Neighborhood processes In a point process, the... 続きを読む >>

Blog reader Ramiro Massol asked for advice on segmenting his cell images, so I gave it a try. I'm not a microscopy expert, though, and I invite readers who have better suggestions than... 続きを読む >>