Posted by
Michael Doube-2 on
Aug 03, 2006; 6:11pm
URL: http://imagej.273.s1.nabble.com/Evaluating-coregisteration-of-stacks-tp3701888p3701895.html
I just remembered the other thing: if you do repeat registrations and
save the results, then subtract one transformed image from the other
transform repeats, you will get black images if registration is
perfectly repeatable, or embossed-looking images if they're not. The
amount of 'embossing' is an expression of how repeatable your
registration is. You could do some maths on the embossed / error images
to quantify the amount of difference I guess.
Mike
Nas wrote:
> Hi all,
>
> I have sets (different subjects) of MR stacks aquired
> with 2 different sequences one is an EPI and the other
> is an anatomical scan. For analysis I prefer to avoid
> co-registration for most of the cases and do
> registration only for those cases that would "really"
> need to be co-registered. I would like to know how
> should I decide if registration is necessary? Other
> than just visually inspecting the stacks I would like
> to know if there is any quantitative method for this
> matter?
>
> I would also like to ask another question: say you
> have coregisterd two images how will you evaluate "the
> goodness" of registration?
>
> What tools ImageJ provid for this purpose?
>
> Best,
> Nas
>
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