On Thu, 2007-08-09 at 19:35 +0200, Øyvind Kolås wrote: > For downscaling (decimating) box filtering is orders of magnitude > better than the buggy erronious use of interpolation that currently is > used in GIMP. For what it's worth, for www.fromoldbooks.org, I routinely scale images down to 20% or smaller of original width; I find that the GIMP "Lancsoz" and "Cubic" modes produce very different results. Sometimes one is better and sometimes the other. It's a difficult test because the engravings often have patterns of almost-horizontal slightly-wavy lines that are, say, between 6 and 9 pixels apart... so you get strange artifacts appearing. Sometimes I try a gaussian blur before downsizing, too, e.g. with a radius of 3 or 5 or so; sometimes I use "value propagate" first. Liam -- Liam Quin - XML Activity Lead, W3C, http://www.w3.org/People/Quin/ Pictures from old books: http://fromoldbooks.org/ Ankh: irc.sorcery.net irc.gnome.org www.advogato.org _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
