# Autostereogram

Jiro's pick this week is abSIRD by Daniel Armyr. Here's a fun pick for the week. This function takes a matrix, representing a height-map, and visualizes it using an Autostereogram. To quote Daniel, "the algorithm used is abSIRD, published in 2004 by Lewey Geselowitz. It is a fast, in-place algorithm that is exquisitely simple to implement." Can you see them? Hint: cross your eyes.
m = membrane(1, 250, 9, 2);
makeAbsird(m);
p = load('penny');

% Make it 4 times bigger (imresize from Image Processing Toolbox)
p2 = imresize(p.P, 4);

makeAbsird(p2);
What a great way to visualize 3D data! I like this entry not only for the coolness factor, but also for how it is written. The code is robustly written with error checking and plenty of comments to describe the algorithm. I also like the published example code that he included with the entry. These files can be easily created using MATLAB's publishing capability, and it's a great way of showing how to use your code or explaining concepts. I especially like them when they are used with File Exchange entries. Comments Give this function a try (and cross your eyes) and let us know what you think here or leave a comment for Daniel.

Published with MATLAB® 7.14

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