计算机彩色印前系统中的挂网技术

挂网技术是计算机彩色印前处理的关键技术之一，对彩色印刷的质量影响极大，文中介绍了作者研制开发的一个计算机彩色印前系统中所采用的高精度挂网技术，其中包括自动搜索选取满足传统网角精度与相近网频要求的各版超网目参数的算法，以及以超网目为基础实现的挂网控制技术，整个算法实现了预定的网角与网频，达到了实用程度。

Screening Technology in Computer Color Prepress System

Digital halftoning is a key technique for Computer Color Prepress System (CCPS). In this paper,the algorithm for digital halftoning or HAST (High Accurate Screening Technology) is discussed. Firstly the principle of screening and the survey of CCPS are introduced,especially the rational tangent (RT)screening and supercell technology. And then the algorithm of seeking eligible supercells to generate desired angles and frequencies of four color printing plates is presented. Furthermore a method for converting continuous image to binary image is offered. All of algorithms are realized.