Re: image template match

abhi -

Take FFT of template and multiply by complex conjugate of the other
images. Stay in the frequency domain! I tried using xcorr2 function just
for fun once, and what took about 3 seconds in frequency domain took 30
minutes in real domain using xcorr2.

Bill




<abhijitkher@xxxxxxxxx> wrote in message
news:1140944630.353401.159010@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
hi,

i have like 100 mri images which i have to check for displacement
let me explain..i hve 100 cardiac mri images which i hve to check for
respiratory motion
is template matchin a good idea where i can select a region in the
image and correlate(xcorr2) it with other images...and get
dispalcements using commands like max(max(C)) where C is the
correlation and then use FIND to find the corresponding row and
column...

or i can tke the FFT of a sample images and FFT of rest of the images
and keep on multiplying them in a loop...and then tke ifft
which is a better idea..tke fft2 multiply ifft and thor use xcorr2

need help
thanks
abhi



.

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