Published
Batch processing
23-Jun-2015 update: See the new Image Batch Processor App (added to R2015a) and my blog post about it. A...
20 years ago
Published
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...
20 years ago
Published
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...
20 years ago
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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...
20 years ago
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A Lab-based uniform color scale
DSP Tips & Tricks One of my favorite professional publications is IEEE Signal Processing Magazine. ...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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....
20 years ago
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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....
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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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...
20 years ago
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Spatial transformations: maketform, tformfwd, and tforminv
Several Image Processing Toolbox functions related to spatial transformations use "tform" structures. A tform...
20 years ago
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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...
20 years ago
Published
Spatial transformations: Affine
To explore spatial transformations of images, we need a simple, nontrivial, and useful transformation. The affine...
20 years ago
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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...
20 years ago
Published
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...
20 years ago
Published
All about pixel colors
Note See the following posts for new or updated information about this topic: MATLAB image display - from data values...
20 years ago
Published
Spatial transformations
Section 5.11 of Digital Image Processing Using MATLAB covers spatial transformations. I'm interested in expanding this...
20 years ago