Patent ID: 6885383

Claim:
An edge-smoothing procedure for black and white images that are interpolated two-times using pixel replication comprising of: labeling each pixel in the interpolated image by “a” if the pixel is black and: the immediate neighbors at −45, 0, 45, 90, 135 degrees are white while the immediate neighbors at 180, −90, −135 degrees are black or the immediate neighbors at 135, 180, −135, −90, −45 degrees are white while the immediate neighbors at 0, 45, 90 degrees are black or the immediate neighbors at −135, −90, −45, 0, 45 degrees are white while the immediate neighbors at 90, 135, 180 degrees are black or the immediate neighbors at 45, 90, 135, 180, −135 degrees are white while the immediate neighbors at −90, −45s 0 degrees are black; labeling each pixel in the interpolated image by “b” if the pixel is white and the immediate neighbors at −45, 0, 45, 90, 135 degrees are black while the immediate neighbors at 180, −90, −135 degrees are white or the immediate neighbors at 135, 180, −135, −90, −45 degrees are black while the immediate neighbors at 0, 45, 90 degrees are white or the immediate neighbors at −135, −90, −45, 0, 45 degrees are black while the immediate neighbors at 90, 135, 180 degrees are white or the immediate neighbors at 45, 90, 135, 180, −135 degrees are black while the immediate neighbors at −90, −45,0 degrees are white; selectin a replacement rule: (“a” replaces “b”) or (“b” replaces “a”); replacing all the “a” labeled pixels with the “b” labeled pixels if the rule is (“a” replaces “b”); and replacing all the “b” labeled pixels with the “a” labeled pixels if the rule is (“b” replaces “a”).