基于小波和脊波的分层图像压缩算法
layered Algorithm image coding based on combinationof wavelet and ridgelet
基于分层思想，结合小波变换和脊波变换的分析优势，本文提出了一种新型的分层编码算法。首先对原图像进行一级小波变换，取出低频带作为原图像的平滑近似，对其进行嵌入式小波零树编码（EZW）,获得平滑层图像；然后根据残差边缘层有限基波变换的特征，提出了一种改进的脊波变换，用以对残差边缘层图像进行更稀疏的表示，并根据变换系数的特点，改进多级树集合分裂算法（SPIHT），实现了变换系数的编码。实验结果表明，本算法在码率较低的情况下具有优于小波零树编码算法的压缩性能，并且能够更清晰地重建原图像中的直线边缘。
his paper proposes a new mutil-layered image coding algorithm used to compress straight-edge-rich image.This algorithm combines the advantage of wavelet and ridegelet transformations.After one-level DWT ,wavelet based EZW is used to code the low frequency sub-band LL1,so that the smooth layer of the original image is coded. According to the characteristic of the residual image's frat cofficients, a modified ridgelet transform is proposed.The SPIHT are aslo modified to realize the coding of transform cofficients.Experiment results show that the proposed algotithm is more efficient than the wavelet-based spiht and can restruct the straight edges more clearly.?????
牛宝珂、冀小平
计算技术、计算机技术电子技术应用
图像压缩脊波变换小波变换拉东变换SPIHTEZW
image compressionridgelet transformwavelet transformRadon transformSPIHTEZW
牛宝珂,冀小平.基于小波和脊波的分层图像压缩算法[EB/OL].(2010-09-17)[2025-08-24].http://www.paper.edu.cn/releasepaper/content/201009-382.点此复制
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