Yesterday (Tuesday), I read a good portion of the Octave manual and an interesting paper about PCA (Principal Component Analysis) (PDF of the paper Here). It’s interesting because it has a simple introduction to covariance matrices, eigenvectors and eigenvalues. Stuff that it’s used in video-games for collision detection. Something that someone at work asked me to help with, recently.. but I couldn’t really do much 8(
In this case PCA is more related to image compression and artificial vision (face recognition).
Then, at home, I fixed the system I made for building the photo-album on the home server. Mostly, I replaced some sad DOS batch file with a Bash script.. which I make run under Cygwin. It also uses ImageMagick to resize images and make thumbnails and Perl to build the final HTML pages.
Today, at work, I did quite a bit of research on face recognition using PCA, DCT and more esoteric stuff like Hidden Markov Fields, of which I know nothing ! Then I had to go to the gym. Then, at home, I installed and setup Octave (which so far I did install only in the office), and got started doing some programming with Octave, following the PCA Tutorial paper.
..so far, no graphic output 8) ..but I’m happy enough to have the opportunity to grasp some Octave/Matlab programming.
Posted by Davide Pasca in Uncategorized