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From: | Jonas Lindqvist |
Subject: | Re: [help-GIFT] Adding and removing images to/from gift |
Date: | Wed, 13 Sep 2006 12:36:47 +0200 |
User-agent: | Internet Messaging Program (IMP) H3 (4.1.1) |
- The second thing is matching algorithm. Currently I get the feeling that my gift is fixed on color more than on shape / texture. sometimes I get perfect results ( e.g. gift finding all appropriate matches I know of ) but sometimes it doesn't even show an image it most definitely should be supposed to. How can I tweak my system to try different methods or make it more sensitive for shape / texture than color ?I remember having written a document about configuring and hacking the gift, which is surely too short, but maybe a starting point. Have you tried the separate normalisation algorithm or which one did you use when running the GIFT?I tried both Classical IDF and Separate normalisation but to be honest, the results did not differ in the least.
Try to fiddle with the parameters to Classical IDF... :-)I too have seen that images that I (as a human) sees as pretty much identical will not appear to be similar to the GIFT. But I'm quite satisfied with the results anyway.
My results got better and better as I added more images. Using just a few hundred images, the results were crap. Adding a few thousand made it promising. Adding almost a hundred thousand images made the results pretty decent, for my purposes.
Color does seem to be an important part of the features though... /Jonas
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