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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...
plus de 14 ans il y a
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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...
plus de 14 ans il y a
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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...
plus de 14 ans il y a
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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...
plus de 14 ans il y a
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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...
plus de 14 ans il y a
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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...
plus de 14 ans il y a
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MATLAB R2011a
R2011a shipped back in April, but I haven't said too much about it, yet. I mentioned the new geotiffwrite function in...
presque 15 ans il y a
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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...
presque 15 ans il y a
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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...
presque 15 ans il y a
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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,...
presque 15 ans il y a
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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...
presque 15 ans il y a
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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.)...
presque 15 ans il y a
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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,...
presque 15 ans il y a
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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...
presque 15 ans il y a
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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...
presque 15 ans il y a
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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...
environ 15 ans il y a
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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...
environ 15 ans il y a
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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 =...
environ 15 ans il y a
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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...
environ 15 ans il y a
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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...
environ 15 ans il y a
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Freehand segmentation in the a*-b* plane
Today I return to examining this picture of M&Ms:url =...
environ 15 ans il y a
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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...
environ 15 ans il y a
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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." ...
environ 15 ans il y a
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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...
environ 15 ans il y a
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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...
plus de 15 ans il y a
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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...
plus de 15 ans il y a
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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...
plus de 15 ans il y a
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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...
plus de 15 ans il y a
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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...
plus de 15 ans il y a
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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...
plus de 15 ans il y a