基于系数优化的图像边缘增强误差扩散方法  

Image Edge Enhancement Error Diffusion Method Based on Coefficient Optimization

作　　者：吴启科[1] 何自芬[1] 

机构地区：[1]昆明理工大学,昆明650500

出　　处：《价值工程》2017年第31期189-191,共3页Value Engineering

摘　　要：传统误差扩散法所生成的半色调图像容易产生"蠕虫"效应及边缘模糊的现象。因此,本文提出了一种基于系数优化的图像边缘增强误差扩散方法,该方法以Shiau-Fan所提出的新加权误差传递算法为基础,采用canny算子来检测图像的边缘且沿边缘方向不断优化其误差滤波器的系数,从而达到增强半色调图像边缘及弱化"蠕虫"现象的目的。The halftone images generated by the traditional error diffusion method tend to produce ＂worm＂ effect and edge blur.Therefore,this paper proposes a method of image edge enhancement error diffusion based on coefficient optimization.Based on the new weighted error transfer algorithm proposed by Shiau-Fan,It detects the edge of the image with ＂canny＂ operator method and the coefficients of the error filter are optimized along the edge direction.So as to achieve the purpose of enhancing the halftone image edge and weakening the ＂worm＂ phenomenon.

关 键 词：误差扩散 数字半色调 边缘检测 坎尼算子 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]