Patent ID: 8682070
Filing Date: 2014-03-25
Classification: G06T,H04N

Abstract:
1. Method for the restoration of edges in continuous tone images having pixels, each pixel having a value, the method comprising the steps of selecting a pair of neighbouring pixels, the pair having a boundary between the two pixels; computing a difference value between values of pixels in the vicinity of the boundary between the pair of neighbouring pixels; computing a restoration value based on the difference value; adding the restoration value to the highest pixel value of the selected pair and subtracting the restoration value from the lowest pixel value of the selected pair, wherein the step of adding and subtracting the restoration value is executed only when four pixels in a line perpendicular to the boundary, of which the selected pair form the two center pixels, have a monotonely increasing value and wherein the difference value is based on values of nearest neighbouring pixels on the same side of the boundary.