一种改进的半色调误差扩散算法  

An Improved Halftone Error Diffusion Algorithm for Midtone

作　　者：朱国仲[1] 刘建华[1] 

机构地区：[1]华北水利水电学院,郑州450011

出　　处：《中原工学院学报》2007年第3期17-19,23,共4页Journal of Zhongyuan University of Technology

基　　金：河南省科技攻关项目(0524220064)

摘　　要：回顾了E-D算法的改进情况,对E-D相关算法的半色调结果图在色调中值时出现的假纹理结构进行了分析,指出用黑白相间的棋盘结构替换假纹理结构,可以得到更好的纹理结构,并给出了算法和试验的结果,最后对比分析三种E-D算法的结果图及其傅立叶谱,证明该方法行之有效.The article reviews many improved error diffusion algorithms, presents their improved aim and implemented methods. Then it analyses their common drawback and gives artifacts basic structure when midtone. The author indicates using chessboard structure as halftone background will improve quality when midtone. At last some halftone image to their Fourier spectrum are compared and prove the method.

关 键 词：半色调 误差扩散 阈值 谱 反馈 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]