hi, I've made a patch to resize by averaging pixels.
http://halo.gen.nz/pil/pil_area_average.patch If people want it, I'll fix up the GCCisms, and make it work on other than RGB images. I wrote it for statistical analysis of images (to get the average density of various areas). For every size I tried it proved quicker and more accurate than the antialias filter (which, OTOH, is more flexible). Typical times resizing from 450 x 325 to 16 x 12 are: NEAREST: 0.000022 BILINEAR: 0.000112 BICUBIC: 0.000192 AREA_AVERAGE: 0.001558 ANTIALIAS: 0.009321 (linux, athlon XP 2800+). The results of this are here: http://halo.gen.nz/pil/examples.html Interestingly, the area averaged image is generally pixel perfect with the Gimp's best resizing ("Cubic"). and finally, I just discovered that emacs can save files as syntax highlighted html, so here is the guts of the patch in full colour: http://halo.gen.nz/pil/AreaAverage_c.html regards Douglas Bagnall _______________________________________________ Image-SIG maillist - Image-SIG@python.org http://mail.python.org/mailman/listinfo/image-sig
