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This set of images highlights what we want to do. Our initial texture can be thought of having "regions" in which we want the filtering to take place. I show these as constant color regions with black boundaries on the image on the left. If we don't filter at all, we get the pixelated result we saw earlier, which is the result shown in the image in the middle. If we properly filter inside these regions, we can get the image shown on the right. Note how the sharp edges are still preserved, but the pixelation is gone. |