Quad-Tree Based Weight Switching Impulse Noise Filter

• Main Authors: Chen-Ru Wang, 王晨儒
• Other Authors: Chung-Hsun Sun
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/21821035007402805847

碩士 === 淡江大學 === 機械與機電工程學系碩士班 === 101 === This paper presents the tri-state median (TSM) filter with weight switching based on quad-tree decomposition. Quad-tree decomposition condition is based on standard deviation. Then, the smooth regions are separated by quad-tree decomposition and the complex regions are determined by histogram statistics. Finally, the TSM filter uses lower weights in the smooth regions and higher weights in the complex regions. In the experiment results, smooth and complex images in different noise ratios will have the well effect for removing the impulse noise.