[Image-SIG] QUERY: metric for the 'quality' of aligning an image

[Crabb, David]

Dear all,

I hope someone might be able to help with what might be a *very* simple
question.

We have some clinical images (normally a sequence of 3) that we are
trying to 'align'. We would hope that these grey scale images (256 by
256) are identical and we are trying to come up with a way of
quantifying the 'agreement'. We have been simply using the mean standard
deviation of the pixel heights (MSDPH). Could someone provide me with a
reference for alternative similarity metrics? In particular some images
have more features (edges) than others, so my intuition tells me we need
to correct for this in out metric, hence the unsuitability of MSDPH).

Thanks for your patience!


-----------------------------------------------
Dr. David Crabb
School of Science,
The Nottingham Trent University,
Clifton Campus, Nottingham. NG11 8NS
Tel: 0115 848 3275   Fax: 0115 848 6690
 



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