Hallöchen! johannes hanika writes:
> the problem with sliders is that they are only a subset of the > full perspective correction (four vertices describe rotation and > translation in at least 3 dimensions, two sliders: 2 > dimensions. and those don't even easily map to a subset). I also have some issues with the current keystone feature. Apart from the often poorly visible "ok" button, I don't see a usecase for the infinity symbols. Similarly, I don't see how grabbing the thick grey bar between the two upper points (when correcting only vertical) can help. In my opinion, they confuse more than they help -- but possibly I don't see the actual purpose? Anyway, one feature that I miss is to set the point where the camera looks perpendicularly on the plane to be corrected. At this point, the vertical and horizontal scaling is the same. If this point is known, a slanted checkboard can be transformed to a perfect checkboard. Otherwise, you end up with rectangles instead of squares. One practical usecase is a vertically tilted photograph of a wall/building, with the bottom line not in the picture. Is this already possible with darktable? Tschö, Torsten. -- Torsten Bronger Jabber ID: [email protected] or http://bronger-jmp.appspot.com ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
