Edge-Directed Interpolation

Anyone who has done anything with graphics and/or image processing has had to deal with image interpolation in one way or another. Most of the graphics coders out there have dealt not far beyond the the bilinear texture interpolation that is built into our 3d accelerator hardware. Even so, most of us are able to recognize its weaknesses and cases where it produces quite troublesome visual cues. Theoretically, we get some improvements in more recent video cards by virtue of anisotropic filtering. However, anisotropic filters serve more as a "don't make it look so bad" solution rather than an "it will look good" solution. The interpolation itself is faulty.