【作者】 张梁斌； 邹玮刚；

【Author】 ZHANG Liang-bin~1 ZOU Wei-gang~2 1 (Faculty of Computer Science and Information Technology,Zhejiang Wanli University,Ningbo,315100) 2 (School of Sciences,Jiangxi University of Science and Technology,Ganzhou,341000)

【机构】 浙江万里学院计算机与信息学院； 江西理工大学理学院；

【摘要】 数字图像压缩技术是图像数据存储和传输的关键,本文提出了一种小波域内相邻子图像之间的分形编码预测方法。首先选择合适的小波基对图像进行二级小波分解,然后对分解得到的二级高频子图像进行 Jacqain 方法的分形编码,利用同方向不同分辨率小波域内的子图像之间存在较强的相似性,对二级高频子图像的分形编码参数进行适当的比例变换,最后从水平、垂直和斜方向三个方向近似预测出一级对应高频子图像的分形编码。实验验证表明,该方法在同类图像基本保证图像解压质量同时,极大地缩短了编码时间和提高了压缩比。更多还原

【Abstract】 Compression technology of digital image has become to be an important aspect in the storing and transferring of digital image,this paper put forwards a fractal image coding forecasting method base on wavelet domain in adjacent subimage.Firstly the image is decomposed with two-scale wavelet transform according appropriate wavelet base,then we applied the basic fractal coding method of Jacqain to the decomposed two high level subiraage,according to the likeness of structure between different level border subimage.With suitable scale transform of two high level subimage fractal coding,we finally forecast one high level subimage fractal coding through hodzontai,vertical and oblique direction.Experiment results showthat image compression time is greatly shorten,and compression ratio is quite improved.Moreover,quality of image after decompression are quaranteed with the same image.更多还原