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I think you are talking about something like this? http://fiji.sc/wiki/index.php/Interactive_Moving_Least_Squares

I think you are talking about something like this? http://fiji.sc/wiki/index.php/Interactive_Moving_Least_Squaresthis? Moving Least Squares or Thin Plate Splines

also here some code for opencv http://ipwithopencv.blogspot.com/2010/01/thin-plate-spline-example.html http://ipwithopencv.googlecode.com/svn/trunk/ http://code.google.com/p/imgwarp-opencv/

I think you can generate some map and then use remap.

by the way what is other algorithms to do this?what if we have no landmarks but just pixel data?

I think you are talking about something like this? Moving Least Squares or Thin Plate Splines

also here some code for opencv http://ipwithopencv.blogspot.com/2010/01/thin-plate-spline-example.html http://ipwithopencv.googlecode.com/svn/trunk/ http://code.google.com/p/imgwarp-opencv/

I think you can generate some map and then use remap.

by the way what is other algorithms to do this?what if we have no landmarks but just pixel data?