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Re: correlation between images [message #66011 is a reply to message #65922]

Wed, 08 April 2009 01:04

Wout De Nolf
Messages: 194
Registered: October 2008

Senior Member

On Mon, 6 Apr 2009 10:12:07 -0700 (PDT), Mike
<Michael.Miller5@gmail.com> wrote:

> That reminded me that the open source program gqview includes a tool
> for finding duplicate images based on a similarity measure. Maybe the
> code would shed some light...

The code can be found in "similar.c"

It seems that both images are subdivided in 32x32 subimages. For each
subimage the average value is calculated. Then the (normalized) sum of
differences between the two resulting 32x32 arrays is taken as
similarity measure.

So this is similar to the RMS approach.

As for the SPMs: it seems I'll have to invest a lot of time to
understand and implement this. You seem to have doubts about its use
in my case. Do you think it's worth the effort?

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[Message index]

		correlation between images By: Wout De Nolf on Thu, 02 April 2009 05:33
		Re: correlation between images By: Mike[2] on Wed, 08 April 2009 07:20
		Re: correlation between images By: Wout De Nolf on Wed, 08 April 2009 01:04
		Re: correlation between images By: Mike[2] on Mon, 06 April 2009 10:12
		Re: correlation between images By: Mike[2] on Mon, 06 April 2009 09:59
		Re: correlation between images By: David Fanning on Mon, 06 April 2009 08:46
		Re: correlation between images By: Wout De Nolf on Mon, 06 April 2009 08:13
		Re: correlation between images By: Mike[2] on Mon, 06 April 2009 07:35
		Re: correlation between images By: Wout De Nolf on Mon, 06 April 2009 02:56
		Re: correlation between images By: C.E. Ordonez on Fri, 03 April 2009 07:43
		Re: correlation between images By: Wout De Nolf on Fri, 03 April 2009 05:01
		Re: correlation between images By: Wout De Nolf on Fri, 03 April 2009 00:45
		Re: correlation between images By: Brian Larsen on Thu, 02 April 2009 14:02
		Re: correlation between images By: Brian Larsen on Thu, 02 April 2009 13:56
		Re: correlation between images By: Brian Larsen on Thu, 02 April 2009 10:54
		Re: correlation between images By: Wout De Nolf on Thu, 02 April 2009 09:14
		Re: correlation between images By: Brian Larsen on Thu, 02 April 2009 07:45
		Re: correlation between images By: Brian Larsen on Thu, 02 April 2009 07:38

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