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| 基于主观视觉的小波图像编码方法 | |
| 引用本文： | 沃焱,韩国强,张波. 基于主观视觉的小波图像编码方法[J]. 计算机工程与设计, 2007, 28(12): 2870-2872,2908 |
| 作者姓名： | 沃焱 韩国强 张波 |
| 作者单位： | 华南理工大学,计算机科学与工程学院,广东,广州,510641;中山市公安局,广东,中山,528400 |
| 基金项目： | 国家自然科学基金 , 广东省自然学基金 , 华南理工大学校科研和教改项目 |
| 摘 要： | 通过对不同小波系数加权优化量化步长的方式提出了基于视觉特性的零树编码算法.视觉权值通过刚能鉴别出的失真阈值JND计算出来.而JND的计算则通过人眼视觉系统的频率敏感度、亮度敏感度、图像内容的对比掩盖效应以及边缘掩盖效应4个特性来计算.实验证明,在相同主观质量的情况下,提出的算法优于原始的EZW/SPIHT算法,可以取得更高的压缩比. |
| 关 键 词： | 图像编码 小波变换 人眼视觉特性 零树编码 刚能鉴别的失真 |
| 文章编号： | 1000-7024（2007）12-2870-03 |
| 修稿时间： | 2006-06-26 |
Wavelet image coding algorithm based on perception |
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| WO Yan,HAN Guo-qiang,ZHANG Bo. Wavelet image coding algorithm based on perception[J]. Computer Engineering and Design, 2007, 28(12): 2870-2872,2908 | |
| Authors: | WO Yan HAN Guo-qiang ZHANG Bo |
| Affiliation: | 1. College of Computer Science and Engineering, South China University of Technology, Guangzhou 510641, China; 2. Zhongshan Police Office, Zhongshan 528400, China |
| Abstract: | In this paper we propose a perceptually-tuned embedded zerotree image coder that introduces a perceptual weighting to the wavelet transform coefficients prior to EZW encoding.The perceptual weighting for all subbands are computed based on the just notice-able distortion(JND) thresholds.And the JND thresholds are computed based on the four different properties of the human visual system that have been studied in the context of image coding: frequency sensitivity,luminance sensitivity,contrast masking,and edge masking.The experiment shows that perceptually-tuned coder produce a lower bit-rate than SPIHT,and has the same perceptual image quality. |
| Keywords: | image coding wavelets transform human visual characteristic zero-trees coding just noticeable distortion |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |