Re: [Cartoweb-users] OT:tools for image processing

2007-08-10 Thread wochter
Hi, try GRASS http://grass.itc.it wochter [EMAIL PROTECTED] wrote / napĂ­sal(a): > 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

Re: [Cartoweb-users] OT:tools for image processing

2007-08-10 Thread Jacolin Yves
Hi, You can use grass and process a raster difference between both georeferentiated ortophotos (with r.mapcalc) then you will obtain an another raster which you can process to filter data in binary format (0-1 only 1 means same values, 1 values are different) using r.reclass function. So you c

[Cartoweb-users] OT:tools for image processing

2007-08-09 Thread giuseppe . derossi
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 -- Email.it, the professional