Am 26.12.2012 21:22, schrieb Klaus Post: > Hi! > > A few weeks ago dithering was added to Rawspeed, as part of the bit > scaling process. Rawspeed delivers 16 bit images, so for images that are > scaled from 12 to 16 bit, the "new" 4 bits now contain noise instead of > "0" (or any other fixed value). I don't know when or if darktable has > been updated with this code. > > I think the only case where dithering isn't applied is some compressed > Nikon formats that contain values compressed with a fixed tone curve, > but other than that you should get automatic dithering on all images > already.
I think we are mostly plagued with banding in the 8-bit quantization regime. Therefore noise added at 12bit will be too low to prevent that kind of artifacts. But you are right concerning 16-bit output formats. Ulrich ------------------------------------------------------------------------------ Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery and much more. Keep your Java skills current with LearnJavaNow - 200+ hours of step-by-step video tutorials by Java experts. SALE $49.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122612 _______________________________________________ darktable-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-devel
