图象小波变换编码的双金字塔数据结构

陈顺三; 扬立; 谭玫芳

doi:10.11834/jig.19970910

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图象小波变换编码的双金字塔数据结构
A Dual-pyramid Data Structure for Image Coding Using Wavelet Transform
1997年2卷第9期页码：599
纸质出版：1997
DOI： 10.11834/jig.19970910
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陈顺三, 扬立, 谭玫芳. 图象小波变换编码的双金字塔数据结构[J]. 中国图象图形学报, 1997,2(9):599. DOI： 10.11834/jig.19970910.

A Dual-pyramid Data Structure for Image Coding Using Wavelet Transform[J]. Journal of Image and Graphics, 1997, 2(9): 599. DOI： 10.11834/jig.19970910.

摘要

利用小波变换将图象分解成一组多分辨率子图象

提出了一种改进的编码方案---利用子图象的灰度统计分布特性和人眼视觉特性的分配比特数；采用双金字塔数据结构对图象数据进行编码，充分利用子图象的相似性，进一步减少了数据量。10幅奶牛图象的平均压缩比达到26.2，平均信噪比为30.6dB具有较好的图象恢复质量.

Abstract

wavelet transform is adopted to decompose an image into a group of multiresolution sub-images.An improved coding scheme is developed which have considered the gray distribution properties of sub-image and human being's vision.image data have been reduced farther by using dual-pyramid data structure for sub-image coding.which have great similarity with each other.The mean compression rate and signal-to-noise ratio for 10 cow's image is 26.2 and 30.6.respectively.The reconstructural quality of image is high.