# Spatial transformations: maketform, tformfwd, and tforminv115

Posted by Steve Eddins,

Several Image Processing Toolbox functions related to spatial transformations use "tform" structures. A tform structure has data and function handles needed for applying a spatial transformation in the forward or the inverse direction, and sometimes ... read more >>

# All about pixel colors: Scaled indexed images52

Posted by Steve Eddins,

In my last post on pixel colors, I described the truecolor and indexed image display models in MATLAB, and I promised to discuss an important variation on the indexed image model. That variation is the scaled indexed image, and the relevant MATLAB image display function... read more >>

# Spatial transformations: Affine23

Posted by Steve Eddins,

To explore spatial transformations of images, we need a simple, nontrivial, and useful transformation. The affine transformation fits the bill. ... read more >>

# All about pixel colors: Truecolor and indexed images76

Posted by Steve Eddins,

Last week I posed this question: How does MATLAB associate the value of a particular matrix element with a color displayed on the screen? Let's start by exploring MATLAB's two basic pixel-color display models: ... read more >>

# Spatial transformations: Terminology and notation8

Posted by Steve Eddins,

"Terminology and notation" - is there a more boring way to start a topic? Unfortunately it's necessary, because there is a lot of variation in terms and equations from book to book and paper to paper. Some of the "frequently-asked questions" arise from simple confusion over notations and conventions. Even... read more >>

Posted by Steve Eddins,

Tell me, quick: What are the colors of these pixel values? ... read more >>

# Spatial transformations10

Posted by Steve Eddins,

Section 5.11 of Digital Image Processing Using MATLAB covers spatial transformations. I'm interested in expanding this material to a full chapter. I'd like to use this blog to explore these topics and get your feedback about them. ... read more >>

# Comment policies2

Posted by Steve Eddins,

I intend to have as few rules as possible about comments on this blog. I may add new rules as the need arises. ... read more >>

# DIMES on Mars

Posted by Steve Eddins,

Steve Squyres' book, Roving Mars: Spirit, Opportunity, and the Exploration of the Red Planet, is a really fun read. Highly recommended. ... read more >>

# MATLAB’s publish function5

Posted by Steve Eddins,

Have you discovered the Publish to HTML functionality in MATLAB 7 yet? If not, you should definitely check it out. ... read more >>

These postings are the author's and don't necessarily represent the opinions of MathWorks.