Patent ID: 8724009
Filing Date: 2014-05-13
Classification: G06T,H04N

Abstract:
1. A method for evaluating a measure of sharpness of an image on basis of a plurality of edges within said image, comprising: receiving said image into a computing device; and, evaluating by said computing device a first measure on a gradient profile of an edge among said plurality of edges, wherein a contribution of a second measure of said gradient profile towards said measure of sharpness depends at least in part on said first measure but not on detection of any other edge, wherein each of said first and second measures is not affected by a change that scales all gradient values in said gradient profile with a non-zero scaling factor, wherein said gradient profile is a sequence of gradients that includes one peak gradient or one pair of mutually adjacent peak gradients of equal gradient values and gradient values of said gradients decline with each gradient further away from said one peak gradient/pair of peak gradients.