Blog reader Kathirvel wanted to know more about the MATLAB default image and how it was formed. I'll show briefly how it was done, using a small magic square and a Pascal matrix. m =...

Blog reader Kathirvel wanted to know more about the MATLAB default image and how it was formed.

I'll show briefly how it was done, using a small magic square and a Pascal matrix.

Blog reader Alex asked for an explanation of nonflat grayscale dilation and erosion. In the most commonly-used form of dilation, the structuring element defines a neighborhood of a pixel. In... read more >>

Back in September I wrote that I would be attending the IEEE International Conference on Image Processing this month, and that I would be giving a seminar on software development tools and... read more >>

Back in January, I wrote that I was using the MATLAB publish feature to generate some of my blog posts. Since then, I've used publish for almost every post. I write my post as a MATLAB script, and... read more >>

Reader JP asked me about my recent blog post on the Hough transform. Specifically, she wanted to know exactly how the rho-theta coordinate system was defined. When I answered her question, ... read more >>

Image display was added in version 4 of MATLAB, sometime around 1990. Many observant users noticed that the low-level image display object had default pixel values. In other... read more >>

The sci.image.processing newsgroup had a discussion this week on separable filters, which reminded me that separability has been on my blog topic ideas list for a while now. ... read more >>