Currently, until SVG 1.2 (or 2.0?) provides this function I would use a webserver for that purpose.
For geo/carto data there is the UMN mapserver who can send back pixel values. The requests can be sent through a URL. (see http://mapserver.gis.umn.edu/doc44/raster- howto.html#query) - mapserver can also do more complex raster queries than just simple pixel values. The idea that Holger proposes might be possible, but likely to be complicated to implement and slow, because javascript is not very fast for things like image-processing. Andreas --- In [email protected], "Nicolas BOUTET" <[EMAIL PROTECTED]> wrote: > Hi, > > does someone know if it's possible (and how), using ECMAScript, to get the > RGB value (or LookUpTable index) of a pixel (using X,Y coordinates) of an > image item. > > Thanks > > Nicolas > > > [Non-text portions of this message have been removed] ----- To unsubscribe send a message to: [EMAIL PROTECTED] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ---- Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/svg-developers/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
