【作者】 葛善虎； 丁宣浩；

【Author】 GE Shan-hu,DING Xuan-hao (Department of Computing Science and Mathematics, Guilin,Guangxi, 541004, China)

【机构】 桂林电子工业学院计算科学与数学系；

【摘要】 从图像本身的统计特性出发,利用小波包对图像进行多层分解,提出适度分层阈值法,并将适度分层阈值法与分层阈值法对相同的图像进行对比实验。结果是,适度分层阈值法有效克服了DCT在图像压缩中存在的“方块效应”,并且比分层阈值法对图像进行压缩更能达到较好的压缩效果。更多还原

【Abstract】 In terms of statistic characteristics of an image,a wavelet package is used in the multilayer decomposition of image compression, and that brings up a moderate-hierarchical threshold value method. It is compared with the hierarchical threshold method. The result shows that this method not only overcomes DCT shortcomings of square-piece effect in image compression, but also has more compression effect than the hierarchical threshold method.更多还原