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Re: Cross-correlation of two images? [message #15708 is a reply to message #15652]

Fri, 04 June 1999 00:00

wbiagiot
Messages: 59
Registered: January 1999

Member

"Craig Hamilton" <cah@medeng.wfubmc.edu> wrote:
>
> I want to compute the cross-correlation of two images and have just
> had a browse of the documentation. Seems that I've got to put it
> together myself, either using convolv() after suitable transposition
of
> one of the images, or either doing it using FFTs.
>
> I bet someone has already got a canned routine that does this.
> Am I right?
>

Hi Craig,

I haven't tried cross correlation with images, but a cursory
examination of IDL's C_CORRELATE routine looks like it will handle 2
dimensional arrays. Isn't that what you are looking for? If the answer
is yes, I have a modified version of C_CORRELATE (available on Ron K.'s
website) which runs about 60% faster on computations with multiple lag
factors, that you might be interested in.

-Bill B.

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[Message index]

		Cross-correlation of two images? By: Craig Hamilton on Wed, 02 June 1999 00:00
		Re: Cross-correlation of two images? By: badastro on Mon, 07 June 1999 00:00
		Re: Cross-correlation of two images? By: wbiagiot on Fri, 04 June 1999 00:00
		Re: Cross-correlation of two images? By: Carl G. Zimba on Tue, 22 June 1999 00:00

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