Links to image correlation

• http://link.springer-ny.com/link/service/series/0560/bibs/0077/00770323.htm
  The paper outlined in would seem to be a good summary of methods, but requires a key to download.
• http://www.owlnet.rice.edu/~elec431/projects96/pictomaniacs/previous.html
  Describes a simple correlation method and presents example of Matlab code, and goes on to describe an FFT method.
• http://www.owlnet.rice.edu/~elec431/projects96/pictomaniacs/current.html
  Describes a simple correlation method and presents example of Matlab code, and goes on to describe an FFT method.
• http://www.fmrib.ox.ac.uk/~steve/review/review/node4.html
  Has several promising references within it.
• http://www.mathworks.com/access/helpdesk/help/toolbox/images/corr2.shtml
  Describes the operation of the correlation function between two matrices in Matlab.
• http://www.octavian.com/ip2ldesc.html
  Supplies a plug-in for MS-Excel which performs 2D correlation. Other functions also available all at a modest price!
• http://www.ecs.wsu.edu/~irl
  Although it's not about image correlation this site has some descriptions of interesting and different filtering and image manipulation techniques.