# Rediscovering Cody

Lately, I've been spending more time on MATLAB Central, and I'd like to encourage you to try out some of the resources there, if you haven't already.Have you heard of Cody? It is an addictive MATLAB... read more >>

# How to Detect an X-Rite® ColorChecker® Chart1

When I saw this picture, I was really tempted to take it into the local garden nursery and ask them how to keep color checker charts out of my rhododendrons. No, no, this post is not really about... read more >>

# Making Color Spectrum Plots – Part 35

Recently, I've been explaining how I made this plot, which is from DIPUM3E (Digital Image Processing Using MATLAB, 3rd ed.): In my July 20 post, I showed one way to compute the spectral colors to... read more >>

# What is 0.01?4

I was looking at these two numbers the other day:$0.01$$\frac{5764607523034235}{576460752303423488}$It turns out they are very close, differing only by about 5 parts in a quadrillion.A tech support... read more >>

# Making Color Spectrum Plots – Part 2

It was a while ago now, but on April 27 I started explaining how I made this plot, which is from DIPUM3E (Digital Image Processing Using MATLAB, 3rd ed.):... read more >>

# Making Color Spectrum Plots – Part 1

The new edition of Digital Image Processing Using MATLAB (DIPUM3E) contains a number of MATLAB functions related to color, color calculations, and color visualization. I wrote about functions for... read more >>

# How to Display Color Swatches2

When working on the "Color Image Processing" chapter of DIPUM3E, I found myself often wanting to display square blocks (or swatches) of color, like this: Eventually, I wrote a function,... read more >>

# Treble clefs, Unicode, SVG, strings, Bézier curves, kron, implicit expansion, and polyshape6

Today I will show you how I plotted this treble clef symbol in MATLAB: My discovery and implementation process for doing this involved Unicode characters, SVG files, string processing, Bezier curves,... read more >>

# How to Write Animated PNG (APNG) Files from MATLAB3

Today, I'm writing about how to create animated PNG (APNG) files, such as this one: I first wrote about APNG files last February. An APNG file is a valid PNG image file that uses file metadata in a... read more >>