[Spm] image comparison and subtraction

[Александр Филонов]

Dear Iain,

You can do the comparison by performing cross-correlation. The coordinates
of the maximum on the correlation image will give you the precise offset,
calculated by statistical method. Then you can subtract one image from
another, using calculated offset. All these operations can be performed in
our software, FemtoScan Online. If you'd send me the original .sm4 files, I
could implement the file reader for them, and include it into the software.
I can provide you with more detailed description by e-mail, if you wish.

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Sincerely,
Alexander Filonov
Advanced Technologies Center
WWW: http://www.nanoscopy.net