Hallöchen! johannes hanika writes:
> the keystone correction formula uses a perspective correction approach > (i.e. image plane x and y shortening is proportional to 1/z in 3d and > different for every pixel, much like > http://en.wikipedia.org/wiki/Texture_mapping#Perspective_correctness). i > don't see why you would need additional constant scaling? If I apply keystone correction to the plane of the lower-level piano keys in <http://wilson.homeunix.com/pc/before.jpg>, the result is <http://wilson.homeunix.com/pc/after.jpg>. Thus, the aspect ratio of the piano keys is not correct. Even worse, http://wilson.homeunix.com/pc/impossible.jpg cannot be corrected at all, although at least a crop of the picture is correctable. Tschö, Torsten. -- Torsten Bronger Jabber ID: [email protected] or http://bronger-jmp.appspot.com ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
