Steve on Image Processing with MATLAB

Image processing concepts, algorithms, and MATLAB

Posts 531 - 540 of 597

Labeling labeled objects 82

A post in comp.soft-sys.matlab this week (see the third post in this thread) asked how to display graphically the numerical labels associated with each labeled object. In this blog I'll show a... read more >>

Bit slices

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.

Nonflat grayscale dilation and erosion 22

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 >>

Software development tools for engineers 9

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 >>

Getting MATLAB code from blog postings 8

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 >>

Hough transform coordinate system 19

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 >>

The Story Behind the MATLAB Default Image 13

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 >>

Separable convolution 26

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 >>

Dilation, erosion, and the morphological gradient 53

The morphological operator dilation acts like a local maximum operator. Erosion acts like a local minimum operator. You can use them together to compute something called the... read more >>

Unusual red-eye reduction technique 5

I was amused by this portion of a product description for a digital camera. I'm not sure that this is what I would expect from a red-eye reduction algorithm, but you have to admit it's a pretty... read more >>

Posts 531 - 540 of 597

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