Steve on Image Processing

Gray-scale dilation equation 4

Posted by Steve Eddins,

A question came into tech support a month or so ago regarding the documentation for imdilate. The question concerned an apparent discrepancy in the equations for binary and grayscale dilation. Here's the formula given for binary dilation:... read more >>

Displaying a color gamut surface 8

Posted by Steve Eddins,


Today I'll show you one way to visualize the sRGB color gamut in L*a*b* space with assistance with a couple of new functions introduced last fall in the R2014b release. (I originally planned to post this a few months ago, but I got sidetracked writing about colormaps.)... read more >>

New online documentation system for R2015a 8

Posted by Steve Eddins,

Earlier this month we shipped R2015a, the first of our two regularly scheduled annual releases. Typically, when there's a new release, I spend some time talking about features that interest me. The feature I want to mention today, though, is a little unusual because it benefits users who haven't even... read more >>

MATLAB, Landsat 8, and AWS Public Data Sets

Posted by Steve Eddins,

A few weeks ago, a fellow developer (Kelly Luetkemeyer) pulled me into his office to show me something he had been working on. It was very cool! Even better, it's now available for you to try. I'd like to introduce guest blogger Bruce Tannenbaum, product marketing manager for image processing... read more >>

About that dress … 14

Posted by Steve Eddins,


This afternoon my wife looked at me with an expression indicating she was convinced that I had finally gone completely and irrevocably crazy.... read more >>

Divergent colormaps 4

Posted by Steve Eddins,

I promised earlier to post about divergent colormaps. A divergent colormap is usually constructed by concatenating two colormaps together that have different color schemes.... read more >>

Time zone terminology 2

Posted by Steve Eddins,

An email thread about a date-related design question had me thinking about terminology this week. (Note: There's nothing about image processing in today's post. Sorry!)... read more >>

A New Colormap for MATLAB – Part 3 – Some Reactions 15

Posted by Steve Eddins,

I hesitated for some time today about where to go next in my discussion about the new default colormap in MATLAB. I finally decided to spend a little time on the reactions so far. Those reactions have ranged from "Great, what took you so long?" to "I hate it; give... read more >>

These postings are the author's and don't necessarily represent the opinions of MathWorks.