基于视觉特性的小波编码研究
首发时间:2010-04-08
摘要:本文在基于码率预测的标准SPIHT算法基础之上引入人眼视觉特性加权算子,利用视觉系统对比敏感度函数(CSF)经过离散小波变换后的11加权值对图像离散小波分解后的系数矩阵进行加权。保留变换后系数的低频部分,增强3,4变换级中的系数,以此来抑制对人眼不太敏感的高频系数。实验结果证明该方法一定程度上改善了图像主观视觉效果。
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Researching Wavelet Transform Coding of Image Based Human Visual System
Abstract:This paper introduces human visual weighted operator based on the SPIHT standard algorithm with predictive rate. The obtained coefficients after the image discrete wavelet decomposition are weighted using 11weighting of the HVS contrast sensitivity function (CSF) in the discrete wavelet transform. Keep the low frequency part of the transformed coefficients, enhanced levels of 3,4-transform coefficients, in order to inhibit the human eye is not sensitive to high frequency coefficients. Experimental results show that the method improved the image to some extent subjective visual effect.
Keywords: Image Compression Discrete Wavelet Transform Human Visual System
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