Image compare
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From: david carollo on 6 Jul 2010 17:14 Hi everyone, I need a free tool (or functions) to measure the similarity between two images..Anyone can tell me about it? Cheers
From: Walter Roberson on 6 Jul 2010 17:37 david carollo wrote: > I need a free tool (or functions) to measure the similarity between two > images..Anyone can tell me about it? "similarity" can be defined many different ways. Which pair of pictures is more "similar"? A) Telescope pictures of two different bar galaxies of similar size and composition; or B) A picture of the Eiffel tower at noon compared to a picture of the Eiffel tower taken from the same location and angle at midnight ? Pair (A) will have far more pixels that are the same (or very close to each other), but pair (B) has the same size and structure but with very different color and lighting. Arguments could thus be made for either pair to be more "similar".
From: david carollo on 7 Jul 2010 04:01 Walter Roberson <roberson(a)hushmail.com> wrote in message <i107sr$7ua$1(a)canopus.cc.umanitoba.ca>... > david carollo wrote: > > > I need a free tool (or functions) to measure the similarity between two > > images..Anyone can tell me about it? > > "similarity" can be defined many different ways. > > Which pair of pictures is more "similar"? > > A) Telescope pictures of two different bar galaxies of similar size and > composition; or > > B) A picture of the Eiffel tower at noon compared to a picture of the Eiffel > tower taken from the same location and angle at midnight ? > > Pair (A) will have far more pixels that are the same (or very close to each > other), but pair (B) has the same size and structure but with very different > color and lighting. Arguments could thus be made for either pair to be more > "similar". I need to compare an original image (jpg) with another one make from a mosaic program (tiled image)..
From: ImageAnalyst on 7 Jul 2010 07:17 I think Walter's answer would be the same. Maybe you can post two images and say what kind of number you'd like to get and how that might be determined, as there are hundreds of ways.
From: david carollo on 7 Jul 2010 11:00
ImageAnalyst <imageanalyst(a)mailinator.com> wrote in message <7fef4da0-1e2d-427d-a61d-7cc3078e6c3c(a)i31g2000yqm.googlegroups.com>... > I think Walter's answer would be the same. > Maybe you can post two images and say what kind of number you'd like > to get and how that might be determined, as there are hundreds of > ways. Ok, you can view here: http://drop.io/etjwikf if it want a pw:m9j5hgdctq Thank u! |