| Re: correlation between images [message #66120 is a reply to message #65922] |
Thu, 02 April 2009 07:38  |
Brian Larsen
Messages: 270
Registered: June 2006
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Senior Member |
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Now the details of actually how to do this escape me for now. But a
few ways that come to mind as statistically convincing are:
- compute the cross correlation of the images in chunk showing that
each chuck is cross correlated
- Create a difference image and compare the fluctuation in the
difference to the fluctuations of the image itself or if they are
statistically different from "chunk" to "chunk"
- one might be able to dream about a Kolmogorov–Smirnov test showing
that the distributions of the 2 images are the same, or that the
difference is normal or something like that.
But really I think you are best off beating your head on c_correlate
until it makes sense.
Cheers,
Brian
------------------------------------------------------------ --------------
Brian Larsen
Boston University
Center for Space Physics
http://people.bu.edu/balarsen/Home/IDL
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