3 ms·
This is precisely the method used to undo screening and half-toning in one of the labs in 6.003 (the intro signal processing course at MIT). The technique works
by agalunar 5y ago
This is precisely the method used to undo screening and half-toning in one of the labs in 6.003 (the intro signal processing course at MIT). The technique works astoundingly well for its straightforwardness, and the exercise can be a lot of fun.
[1] https://sigproc.mit.edu/spring19/psets/11/cat https://sigproc.mit.edu/spring19/psets/11/cat
[2] https://sigproc.mit.edu/fall19/psets/10/cat https://sigproc.mit.edu/fall19/psets/10/cat
- azalemeth 5y agoMy institution's equivalent was projecting an image of a "criminal" behind bars, doing the masking with a piece of blue-tak in the reciprocal space, and then watching the bars vanish in the image. And then doing the same thing with a cold-war era real life spy-plane photograph of the ocean, followed by masking out the frequency corresponding to the waves, and revealing the underwater submarine. Fun and lifelong memorable.
- kccqzy 5y agoI also remember this being a part of the "mathematical imaging" course at UCLA. It really was a lot of fun, though the topics were a bit dated.