摘要
基于小波变换和“改变了的”零树法编解码原理 ,结合水声信道的特点 ,构建了一个以 DSP为核心的图像处理系统。在不同压缩比的情况下 ,完成了对一幅 6 4× 6 4点阵的静态彩色图像数据的压缩和解压缩。当压缩比与传统的 JPEG算法的压缩比相近的情况下 ,解压缩后图像的总体观感效果有明显的改善 。
Integrating the characteristics of underwater acoustic channel, an image process system with DSP is presented in this paper, based on the fundamental principle of wavelet transforms and 'changed' zero-tree encoding and decoding. Under different compress-ratios, it implements the compression and decompression of a static color image of 64*64 dot matrix. When the compress-ratio is the same as that of conventional JPEG algorithm, the whole vision effect of the decompressed image improves obviously. Thus, this is an active try in color image transmission under the underwater acoustic channel.
出处
《海洋技术》
北大核心
2004年第3期21-25,共5页
Ocean Technology
基金
国家自然科学基金项目 ( 60 2 72 0 2 8)
福建省自然科学基金项目 ( D0 110 0 0 4)
关键词
小波变换
零树法编解码
水声信道
随时截断码流
彩色图像压缩
underwater acoustic channel
wavelet transform
zero-tree decoding & encoding
stopping the bit stream at any point
color image compression
