Published

Jähne test pattern – take 2
Last week I talked about the so-called Jähne test pattern and how I found a description of it in Practical Handbook on...

14 years ago

Published

Measuring elapsed time in MATLAB
The July 2011 issue of MATLAB Digest is out, and an article by Martin Knapp-Cordes and Bill McKeeman caught my eye. It...

14 years ago

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Jähne test pattern
Earlier this week I posted a summary of posts from the beginning of this blog, including my January 13, 2006 post on...

14 years ago

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Five years ago: January and February 2006
It's hard for me to believe, but I started writing this blog just over five years ago. I'm going to start occasionally...

14 years ago

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Binary image hit-miss operator
A few months ago, MATLAB user Julia asked how to "fill 4-connected pixels exclusively" on MATLAB Answers. Here's a...

14 years ago

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Advanced maneuvers with regionprops
Blog reader Mutlu recently asked me this question: "I have two images - one contains class labels (one of 1 or...

14 years ago

Published

MATLAB R2011a
R2011a shipped back in April, but I haven't said too much about it, yet. I mentioned the new geotiffwrite function in...

14 years ago

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More about automatic array growth improvements in MATLAB R2011a
Earlier this week I wrote about the improvements in automatic array growth in MATLAB R2011a. The posted comments made...

15 years ago

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Automatic array growth gets a lot faster in R2011a
One of the most significant MATLAB improvements in the R2011a release is in how certain kinds of array growth...

15 years ago

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Video Sudoku Solver
I just saw a very cool demo that I thought you might like. Teja Muppirala, an application engineer in our Japan office,...

15 years ago

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Computer Vision System Toolbox in R2011a
Some of you may have already noticed a new product in R2011a: Computer Vision System Toolbox. You may also have noticed...

15 years ago

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Color-based segmentation demo on the File Exchange
I have posted a few times about using L*a*b* space to do color segmentation. (See, for example, my 04-Feb-2011 post.)...

15 years ago

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Exporting GeoTIFF files using Mapping Toolbox in R2011a
This is my first post using R2011a, which shipped last week. (MathWorks ships product-line updates twice per year,...

15 years ago

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Even more information about the size function
I'm terrible at predicting what kind of topic will generate a lot of comments. I was sure that last week's post on size...

15 years ago

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Too much information about the size function
Today's post is proof that this old MATLAB dog can learn new tricks. The subject is this: Given an image array, how can...

15 years ago

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Tips for reading a camera raw file into MATLAB
An academic colleague asked me recently how to read the sensor data (in Bayer or color filter array form) from a Nikon...

15 years ago

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Pixel grid
I started writing a post today about the ConvexImage property returned by regionprops. But I got sidetracked along the...

15 years ago

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More on segmenting in a*-b* space
I'm back to looking at M&Ms today. (Previous posts: 17-Dec-2010, 23-Dec-2010, 30-Dec-2010, 11-Jan-2011) url =...

15 years ago

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Research study on testing engineering and scientific software
I have posted here several times about MATLAB xUnit, the unit testing framework that I contributed to the MATLAB Central...

15 years ago

Published

Old fogey tales
When I originally mentioned to Ned that I might be interested in doing a MATLAB Central blog, he suggested that I write...

15 years ago

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Freehand segmentation in the a*-b* plane
Today I return to examining this picture of M&Ms:url =...

15 years ago

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Feature AND
I'm going to take a break from looking at M&Ms this week and instead consider a question that Richard asked...

15 years ago

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a* and b*
Note added 27-Apr-2021: See the updated discussion of this topic in the 27-Apr-2021 post, "Plotting a* and b* colors." ...

15 years ago

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Two-Dimensional Histograms
Last week I showed this picture of M&Ms on my desk, and I used it to raise some vague questions about the...

15 years ago

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What color is green?
"Why do you have M&Ms on your desk?" my friend Nausheen wanted to know. Well, the truth is, for playing around with...

15 years ago

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MATLAB Documentation Center search
I really like the search feature in the new (beta version) MATLAB Documentation Center. (You need a mathworks.com login to...

15 years ago

Published

R2010b – Image Acquisition Toolbox and Video and Image Processing Blockset
I think this'll be my last post with news about the R2010b release. I've posted earlier about changes in Image...

15 years ago

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The mystery of the failing TIFF append loop
For today's post I'd like to introduce guest blogger Ashish Uthama, a MATLAB developer. He's got a story to share with...

15 years ago

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R2010b – MATLAB changes
Last week I wrote about Image Processing Toolbox changes in R2010b, and this week I want to mention some MATLAB changes...

15 years ago

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R2010b – More Image Processing Toolbox changes
In my October 15 post I mentioned some Image Processing Toolbox performance improvements in the R2010b release. Today I...

15 years ago