Scott Long ([EMAIL PROTECTED]): > More smooth is not necessarily less "alias," as you put it. Smoothing > filters work by spreading pixels values into surrounding pixels. The > effect of this is to remove high frequencies from the image. But the > goal of antialiasing is different. We don't want to make the resulting > image smoother, per se, we want to make it more *accurate*. In other > words, we want to consider pixel coverage on the sub-pixel level, and > color pixels according to a more accurate scheme than "If the center > of the pixel is covered, then the pixel is on."
Perfect coverage information does not solve aliasing. Integration over the pixel area is equivalent to filtering with a box. My standard example to show this is a freehand stolen from Poynton's 'A Technical Introduction to Digital Video': http://vektor.theorem.ca/graphics/integration-aliasing.png So, maybe the pixel values might be an accurate representation of a percentage of an area, but it's not removing all aliasing from the image. :) -- Billy Biggs [EMAIL PROTECTED] _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
