Steve on Image Processing

Concepts, algorithms & MATLAB

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Results for: 2007

Remembering Gene Golub, 1932 – 2007

Posted by Steve Eddins,

The book Matrix Computations by Gene Golub and Charles Van Loan sits on the bookshelves of many MathWorks employees. Professor Golub, one of the founding members of the Stanford University computer science department, is a revered figure in the area of numerical analysis and matrix computations. ... read more >>

Cleaning up scanned text 30

Posted by Steve Eddins,

Earlier this year I exchanged e-mail with blog reader Craig Doolittle. Craig was writing MATLAB scripts to clean up scanned pages from old manuscripts. One of the samples he sent me was a page from "Fragmentation of Service Projectiles," N.F. Mott, J. H. Wilkinson,... read more >>

General connectivity 5

Posted by Steve Eddins,

The notion of neighbor connectivity is discussed in most image processing textbooks. Specifically, what is the set of neighbors of a pixel? For example, a commonly-used neighborhood connectivity is 4-connected, where each pixel has four neighbors. The... read more >>

From the archives: All about pixel colors 7

Posted by Steve Eddins,

When I started this blog in early 2006, one of my first series of articles was called "All About Pixel Colors." These articles discussed how MATLAB associates matrix values with specific screen pixel colors. The series talked about the two fundamental image display models (indexed and truecolor); the scaled... read more >>