Steve on Image Processing

Concepts, algorithms & MATLAB

Feret Diameter: Introduction 6

Posted by Steve Eddins,

This is the first of a few blog posts about object measurements based on a concept called the Feret diameter, sometimes called the caliper diameter. The diagram below illustrates the concept. Place the object to be measured inside the jaws of a caliper, with the caliper oriented at a specified... read more >>

Gray-scale pixel values in image regions

Posted by Steve Eddins,

Before I dive into today's topic, I want to invite you to come back to the MATLAB Central Blogs page in a couple of weeks. Look for something new to appear related to deep learning.... read more >>

Frequency Samples for the Output of FFT2

Posted by Steve Eddins,

A MATLAB user recently contacted tech support with a question about the output of fft2. The user had a function, q(x,y), evaluated on an (x,y) grid. The grid evaluation produced a matrix that the user passed to fft2. The user's question: what are the spatial frequencies associated with the elements... read more >>

The Eight Queens Problem – Generating All Solutions

Posted by Steve Eddins,

On April 20, I wrote about an algorithm for solving the Eight Queens Problem. In this problem, the task is to place eight queens on a chessboard so that none of the queens is attacking any other queen. Here is one solution.... read more >>

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