Self-adaptive amending algorithm of image zooming-out based on weighted averaging image sub-block
WU Xi-sheng · Computer Engineering and Applications Journal · 2009
A self-adaptive amending algorithm of image zooming-out based on weighted averaging image sub-block is presented in this paper.This algorithm effectively retains the integrity of gray image information.First,low-resolution image obtained by weighted averaging for image zooming-out is disposed by the way of contrast extension.Then the algorithm takes account of the influence on the whole image information by local area variance and self-adaptively amends the every pixel value of lowresolution image.Experimental results demonstrate that the algorithm can more effectively avoid blurring and artifacts edges than only by the method of weighted averaging for image zooming-out,and generate high quality images.Especially,the visual quality of the images for the large ratio of image zooming-out is more prominent.