sift - http://archive.pkmital.com http://archive.pkmital.com computational audiovisual augmented reality research Mon, 25 Oct 2010 20:44:11 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 SiftGPU (Cg/GLSL/CUDA) for Matlab http://archive.pkmital.com/2009/08/27/siftgpu-cgglslcuda-for-matlab/ http://archive.pkmital.com/2009/08/27/siftgpu-cgglslcuda-for-matlab/#comments Thu, 27 Aug 2009 05:42:00 +0000 http://pkmital.com/home/?p=44 Changchang Wu has a beautiful implementation of David Lowe’s scale invariant feature transform (SIFT) inspired by Andrea Vedaldi’s sift++ and Sudipta N Sinha et al’s GPU-SIFT. Adam Chapman has also made a MATLAB mex version which will allow you to pass in the filename of an image and retrieve the SIFT descriptors and keys as well as perform the matching. If that sounds like a lot of people have implemented this algorithm, then check this out.

I had tried using Adam Chapman’s version though, unfortunately, I already had my images loaded into the MATLAB workspace after performing some manipulations and didn’t want to keep writing/reading from disk, thinking that it would be a waste of computation time. I was also processing a lot of images in turn and was running into a lot of crashes, perhaps from continually loading and unloading the library? I haven’t seen anyone complain about this version on the mathworks site, so maybe it is just me.

In finding a way to avoid writing and reading to disk, I did not foresee a problem in the way MATLAB and OpenGL handle their image data. After a brief exchange with Changchang Wu, he led me on … Continue reading...

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