Øyvind Kolås writes: > > I would feel more comfortable if this parameter was not exposed, but > rather that sane presets were added and given names. In most cases the > additional properties of for instance a displacement map operation > might be visual and conceptual clutter getting in the users way. When > it comes to naming it; I think perhaps smoothing is a good candidate. > You mean, like the "type" for gegl-sampler-cubic, which sets the B and C values based on named bicubic variants? For example, nohalo1 (same result as snohalo1 with smoothing = 0, but runs faster) would be "sharper", snohalo1 with smoothing = 1 would be "smoother", and snohalo1 with smoothing = .5 would be "halfandhalf," or something kind of like that? Likewise with nohalobox (the scheme tuned for downsampling)? You can see samples of what "sharper" and "smoother" would be at http://gsoc.rivetsforbreakfast.com/enlargements.html Note that because s/nohalo is nonlinear, smoothing = .5 does not give the average of the sharper and smoother results. (Note that levels more or less correspond to quality level. Higher levels are not yet implemented.) ---------------------------------------------------------------------- This was my vision (hubris?) or where this would all eventually go (keeping the smoothing parameter visible): There would be a slider corresponding to the amount of custom smoothing being applied (of course, this would do nothing to nearest neighbour and bilinear) for s/nohalo and nohalobox. The user would look at the results (depends on noisiness of resampled image, whether there is much warping going on or only up/downsampling, whether there are a lot of text/perfectly horizontal/vertical lines, amount of visibly annoying aliasing, whether it's for print or the web, etc) and adjust the slider until, hopefully, she are happy. Comments? Nicolas Robidoux University Laurentienne _______________________________________________ Gegl-developer mailing list Gegl-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gegl-developer
