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Batch processing
23-Jun-2015 update: See the new Image Batch Processor App (added to R2015a) and my blog post about it. A...
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Cell segmentation
Blog reader Ramiro Massol asked for advice on segmenting his cell images, so I gave it a try. I'm not a microscopy...
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A little deadline pressure
In a recent comment, blog reader Ramiro asks where I've been for the last couple of weeks. Well, I've been right here at...
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Spatial transformations: Where is the output image?
I wrote previously that most spatial image transformation implementations use inverse mapping. The Image Processing...
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A Lab-based uniform color scale
DSP Tips & Tricks One of my favorite professional publications is IEEE Signal Processing Magazine. ...
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Spatial transformations: Inverse mapping
I wrote last week about the forward mapping method of spatially transforming images. Because of the disadvantages of the...
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Fast local sums
Note See the 09-Jan-2023 post for updated information about this topic, including a discussion of integral images...
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Spatial transformations: Forward mapping
I've written previously about defining a spatial transform as a function, (x,y) = T{(u,v)}, that maps points from one...
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Quick tip: Determining uniqueness of local maximum
A MATLAB user asked me how to determine which image pixels had local maxima that weren't unique. My answer involves...
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All about pixel colors: Summary
This week I wrote the last in a series of postings that discussed how MATLAB associates matrix values with specific screen...
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All about pixel colors: Grayscale and binary images
In my previous postings on this topic, I've discussed the basic image display models in MATLAB - truecolor and indexed....
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Upcoming optimizations in the Image Processing Toolbox
The MathWorks does not normally preview unreleased features, but I thought this might be a good time to make an exception....
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Image overlays
Note For new or updated information about this topic, see: How to Overlay a Color on an Image Using a Mask...
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Quick tip: Use the functions true and false
All I've been doing this week is writing. Unfortunately, I haven't been writing blog postings. Between my other work...
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Getting notified about new blog posts
If you are like me, you never remember to check web sites you are following for new content. I prefer to be automatically...
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Spatial transformations: Useful toolbox documentation links
I've received some comments and e-mail asking how to apply the spatial transformation ideas I've been writing about to...
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MathWorks product release: R2006a
The MathWorks released a new product line update last week. The new release is called R2006a, thus marking the end for...
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Help! My publisher wants a 300 dpi TIFF
MATLAB user Paul contacted me recently to ask how to convert 150dpi JPEGs to 300dpi TIFFs. After I asked for more...
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Spatial transformations: Where is the input image?
We've talked about using Image Processing Toolbox functions to define an affine transformation and apply it to...
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All about pixel colors: Reference information
Note See the following posts for new or updated information about this topic: MATLAB image display - from data values...
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Tracing George
Note See the 17-Jun-2021 post for new or updated information about this topic. Last time, in my spatial...
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All about pixel colors: Window-level and CLim
Note See the following posts for new or updated information about this topic: MATLAB image display - from data values...
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Resetting my expectations: What do users know about new product features?
I learned something interesting this week in conversations with MATLAB users. By e-mail and phone I talked with two people...
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Spatial transformations: maketform, tformfwd, and tforminv
Several Image Processing Toolbox functions related to spatial transformations use "tform" structures. A tform...
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All about pixel colors: Scaled indexed images
Note See the following posts for new or updated information about this topic: MATLAB image display - from data values...
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Spatial transformations: Affine
To explore spatial transformations of images, we need a simple, nontrivial, and useful transformation. The affine...
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All about pixel colors: Truecolor and indexed images
Note See the following posts for new or updated information about this topic: MATLAB image display - from data values...
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Spatial transformations: Terminology and notation
"Terminology and notation" - is there a more boring way to start a topic? Unfortunately it's necessary, because there is a...
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All about pixel colors
Note See the following posts for new or updated information about this topic: MATLAB image display - from data values...
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Spatial transformations
Section 5.11 of Digital Image Processing Using MATLAB covers spatial transformations. I'm interested in expanding this...
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