correlating two arrays

[dmarshall(at)ivory.trentu.ca]

I would like to correlate, (optimize the registration) of two images, but I 
would like to de-emphasize the middle where one image has a reflection of a 
camera ( the other does not ).

I was thinking I could fade the centers on both to the same colour (grey 
say) and run it through a normal image correlation optimization procedure.

Any thoughts?

Dave.
David Marshall                          Physics Dept.  Trent University 
dmarshall@remove.this.ivory.trentu.ca   Peterborough   Ontario   Canada