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Re: correlation of single pixels [message #81928 is a reply to message #81926]

Thu, 08 November 2012 23:53

haikoley
Messages: 5
Registered: November 2012

Junior Member

Thanks Klemen,

but somehow it didn't really help. I figured I have to use a template consisting of my pixel and the neighboring pixelsto find the offset. But something's wrong.

I tried:
CONV= where(max(CONCOVAR(image1, image2, /Correl)))
where concovar is a function returning the correlationmatrix of the images, but somehow all my offsets are 0. That can't be (I checked on the images and there must be an offset around 1 or 2 pixels).

On the other hand I tried using correl_optimize (I found it on the internet), but those results are even weirder. My template is an array of 5x3 elements and the other image is an array of 11x3 elements. correl_optimize returns a y-offset between -2,5 and 2,5 pixels. But how can the y-offset possibly be in a range of 5 pixels when both images only consist of three pixels in y direction? Same with x direction.

I don't have a clue as to what I do wrong. Has someone an explanation for this?

cheers,
Max

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[Message index]

		Re: correlation of single pixels By: Klemen on Fri, 09 November 2012 07:31
		Re: correlation of single pixels By: Brian Daniel on Fri, 09 November 2012 04:35
		Re: correlation of single pixels By: haikoley on Thu, 08 November 2012 23:53
		Re: correlation of single pixels By: Klemen on Mon, 05 November 2012 04:59

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