[Cartoweb-users] OT:tools for image processing

[giuseppe.derossi at email.it]

hi all,
Is there a software tool (or php/java/c++ apis) which compares two
georeferentiated ortophotos and retuns a shape (shp,shx,dbf) which contain
the polygons which have the major differences beetwen the two photos? if
free the better :-)

Giu

Sorry for the OT 
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