Patent ID: 7650042
Filing Date: 2010-01-19
Classification: G06K

Abstract:
1. A method for contour reduction in a digital picture, comprising the steps of: (A) buffering a plurality of luma samples in a current line of said digital picture in a memory, each of said luma samples having a respective input value; (B) calculating a plurality of horizontal sum-of-signs in a window along said current line using a circuit, wherein (i) each of said horizontal sum-of-signs corresponds to a different one of said luma samples, (ii) each of said horizontal sum-of-signs comprises a sum of a plurality of amplitude differences between pairs of said luma samples from said current line in said window and (iii) said pairs of said luma samples are within said digital picture; and (C) generating a plurality of output values based on said horizontal sum-of-signs, (i) each of said output values corresponds to a different one of said luma samples and (ii) said output values form a reduced contour version of said digital picture.