CONTOUR ASSIGNMENT METHOD AND CIRCUIT Russian patent published in 2005 - IPC

FIELD: processing digital video signals including directional ratio of contours during their assignment.

SUBSTANCE: processing is executed by detection of contour direction relative to point where vertical and horizontal contours are intersecting and relative to diagonal contour point. Times of original pixel and all pixels adjacent to source one in horizontal, vertical, and diagonal directions are coordinated, contour assignment values weighed relative to brightness of pixel having greatest difference in brightness out of adjacent pixels in all directions, and relative to brightness of original pixel are computed and added to original pixel. If two weighted continuous contour assignment values have same sign, preceding and next contour assignment values are received at diagonal contour point, otherwise diagonal optimization is conducted to bring preceding and next contour assignment values to zero, and they are added to original pixel.

EFFECT: more natural processing of inclined contours and contour presenting signals at intersection points of horizontal and vertical contours.

5 cl, 19 dwg