I think the better idea would be to try to extract the 'dive spot' locations and map that onto your image. may be a lot easier!
In any case the only non-linear stretching that Im acan do involved using Distortion maps, either absolute positional map
http://www.cit.gu.edu.au/~anthony/graph ... distortion
Or the IM composite displacement map.
http://www.cit.gu.edu.au/~anthony/graph ... /#displace
Neither will probbaly be usable as you have still have the problem of creating that displacement map.
Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
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