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Re: [help-GIFT] Adding and removing images to/from gift

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...


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