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Evolution of logical arrays in MATLAB
An internal design discussion this week prompted me to reflect on the history of logical arrays in MATLAB. Because the...
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Many steps needed for some color-space conversions
It can take a lot of computational work sometimes to convert between color spaces. I was recently looking at the...
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Functional design clunkers
Sometimes I'd really like to be able to go back in time and fix a few of the functional designs in the Image Processing...
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Knuth on go to – 1974
Earlier this year, Perl programmer and author Mark Jason Dominus mentioned in an e-mail list that the 1974 paper...
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Moving toolbox functions into MATLAB
I'm sorry to have disappeared off the blogging map the last couple of weeks. I got involved in some projects that...
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Five years of Image Processing Toolbox changes
Earlier this week I wrote about the lists I keep of MATLAB and Image Processing Toolbox changes that might be relevant to...
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Five years of MATLAB changes related to image processing
Digital Image Processing Using MATLAB has three coauthors, and we are each responsible for different aspects of writing...
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Scattered data interpolation in R2009a
I want to point you to Damian's second guest blog post on Loren's Art of MATLAB. Scattered data interpolation and data...
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A new look for connected component labeling in R2009a – Part 3
I wrote last week about new features in R2009a related to connected component labeling. There are two new functions,...
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A chess coach encounters the “300 dpi” mystery
This is a "small world" story for a mid-summer Friday. Outside work, family, and book writing, I like to play a...
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Computational geometry in MATLAB R2009a
I've always had a kind of amateur's fascination with computational geometry, and computational geometry problems do arise...
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A new look for connected component labeling in R2009a – Part 2
Last week I wrote about our desire to reduce the memory used by bwlabel. I also wrote about other issues we hoped to...
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A new look for connected component labeling in R2009a
One of the changes we made to the Image Processing Toolbox for R2009a was partially inspired by comments received on...
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Getting the MATLAB code from blog posts
Sometimes readers will tell me they had a hard time reproducing results from one of my blog posts, so let me tell you the...
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Reminder about comments on this blog
I would like to remind readers about how I handle comments on this blog. (Please note that each MATLAB Central blog author...
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References on my shelf
Matt Whitaker asked me in a blog comment recently about the references I keep on my own shelf. Well, first of all I...
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Spatial transformations chapter in new edition of Digital Image Processing Using MATLAB
In January 2006, the first month of this blog, I wrote the following: "Section 5.11 of Digital Image Processing...
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Locating the US continental divide, part 7 – Putting it all together
Today is the final post in my continental divide series. In earlier posts I have used the problem of computing the US...
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Locating the US continental divide, part 6 – Final computation and visualization
Today's post in my continental divide series demonstrates the final computational step and shows one procedure for...
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Learning Lessons from a One-Liner
My colleague Greg Wilson, creator of the course Software Carpentry, proposed a couple of programming problems as...
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Anticipation
I just heard that the 2nd edition of Digital Image Processing Using MATLAB just shipped from the printer! ...
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Locating the US continental divide, part 5 – Minima imposition
Today, in part 5 of my series on computing the US continental divide, we'll look at a technique called minima...
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Overview window preference in R2009a
A few years ago we introduced the Image Tool for image viewing, navigation, pixel-value display, cropping, etc. Here's a...
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Locating the US continental divide, part 4 – Ocean masks
Welcome to part 4 of my series on computing the US continental divide. Previously we looked at data import and display,...
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Locating the US continental divide, part 3 – Regional minima
In the previous post in this series on computing the US continental divide, we used the watershed function to find...
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Reproducible research in signal processing
Some blog readers may know that I've been giving a presentation called "Take Control of Your Code" for a couple of years...
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Locating the US continental divide, part 2 – Watershed transform
This post is the second in my series on computing the location of the US continental divide. Today I'm going to...
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Locating the US continental divide, part 1 – Introduction
Today I'm introducing a series on computing the location of the US continental divide. (I was inspired to tackle this...
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Multithreaded FFT functions in MATLAB R2009a
For the past several releases, we have been incrementally making more of the computational routines in MATLAB...
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Digital Forensics
The March 2009 issue of IEEE Signal Processing Magazine landed in my mailbox last week. It contains a special section on...
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