Improved bilinear interpolation algorithm based on edge information
Kai Xie · Computer Engineering and Applications Journal · 2011
Because edge information is not considered,some fringe details of image are damaged in the process of standard bilinear interpolation.To avoid the disadvantages of standard bilinear interpolation,a new algorithm based on edge information is proposed.In this method,three improved solutions have been proposed:edge-pixel and non edge-pixel are distinguished by edge-detection and adaptive-threshold,grey-difference between edge-adjoined-pixel and non edge-adjoined-pixel is extended.Using direction of edges,interpolated points are determined on edge or not.To the point on edge of magnified image,it is interpolated based on edge information.Many experiments confirm that this algorithm is superior to others.