Steve on Image Processing

Concepts, algorithms & MATLAB

Results for: 2017

Feret Diameter: Introduction 8

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 1

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 >>

The Future of String Arrays in MATLAB

Posted by Steve Eddins,

At MathWorks, we almost never talk in detail about product features before they are released. That's why this week's Art of MATLAB blog caught my eye. Guest blogger Dave Bergstein describes in some detail how we expect support for string arrays to evolve in the future. If you do a lot of data analysis or text processing in MATLAB, it is worth your while to take a look at Dave's post.... read more >>