%0 Journal Article
%T A STUDY ON THE PERCEPTUAL ENTROPY OF IMAGES USING WAVELET TRANSFORM<br>基于小波零树的图像感知熵编码研究
%A Yuan Jiehui
%A Wei Zhenggang
%A Cai Yuanlong
%A <br>袁杰辉
%A 魏政刚
%A 蔡元龙
%J 电子与信息学报
%D 2000
%I 
%X In this paper, perceptual error threhhold (PET) functions in different wavelet subbands are obtained through subjective tests on artificial patterns. A new and generic two-stage coding scheme is thus proposed, based on the nonuniform zero-trees of wavelet coefficients and the visually nonuniform quantization of small coefficients in higher subbands. Researches have been done for the visual transparent and nearly transparent cases, in comparisons with JPEG standard. Experimental results showed the feasibility and robustness of the scheme. Transparent quality can be obtained around 10 compression ratios for natural images.
%K Perceptual coding
%K Percetual entropy
%K Wavelet transform
%K Zero-tree<br>感知编码
%K 感知熵
%K 小波变换
%K 零树
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=4F60BB68577363A4&yid=9806D0D4EAA9BED3&vid=BC12EA701C895178&iid=CA4FD0336C81A37A&sid=EA389574707BDED3&eid=DB817633AA4F79B9&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=7