A Novel Nonlinear Scaling Method for Video Images

Digital Video image scaling is a full-fledged technology, and can be found everywhere in our daily life. However, the appearance of HDTV brought some problem between the new display devices and the old video signals. In this paper, a novel method of nonlinear scaling is proposed, aim to overcome the compatibility problem. Different from traditional linear approaches, in which the interpolate points are spaced evenly, the nonlinear approach split the whole image into several areas, each area is treated separately. So after scaling, the central area of the images can still keep the proportion, in the rest parts, calculated distortion can be found, according to human visual theory, it is acceptable. And the simulation result shows that the proposed approach is more efficient than conventional approaches.