1. A method for detecting and processing thin lines in a raster image, the method comprising: calculating a plurality of difference value sets each calculated based on a possible path of a thin line passing through a central pixel of any n×m block of pixels; for each pixel of a plurality of pixels in an image: reading depth values for adjacent pixels of an n×m block of pixels surrounding the each pixel, wherein both n and m are greater than or equal to 3; calculating the difference between selected depth values of the n×m block of pixels to yield a plurality of difference values; comparing the plurality of difference values to the plurality of difference value sets; and precluding, via a graphics controller, application of an anti-aliasing filter to the each pixel based on the comparing of the plurality of difference values to the plurality of difference value sets.