A ROBUST PATTERN-BASED INTER-/EXTRA-POLATION APPROACH FOR IMAGE SCALING

• Main Authors: Jiun-Hung Chen, 陳俊宏
• Other Authors: Jen-Hui Chuang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/87512067056501423338

碩士 === 國立交通大學 === 多媒體工程研究所 === 96 === Unlike image scaling through simple interpolation, which may be followed by some image enhancements, this thesis proposes a method which will scale and enhance the images simultaneously. The proposed approach achieves image scaling by performing either (i) interpolation or (ii) extrapolation according to the analysis of local image region based on 140 4*4 image patterns. While the former helps to keep the smoothness within low contrast image regions, the sharpness along border of such regions will be maintained by the latter. Experimental results show that the balance between smoothness and sharpness can indeed provide fine image quality of the scaled images thus obtained. Because of simple arithmetic operations and limited memory buffers, the proposed approach will be favorable in hardware implementation in the future.