Anti-aliasing smooths out the jagged edges between solid colors. Because the process adds more intermediate colors, the image becomes much less compressible. To keep the file size down, anti-aliased with the fewest number of colors possible. notice on the middle image above that the horizontal and vertical lines do not need anti-aliasing, while the 45° line is only marginally improved. If you use any other angle or curve, anti-aliasing becomes a necessity. |