数字半色调技术及网屏原理

Technique of digital halftone and screen resolution

计算机数字图象输出时 ,要先进行半色调处理 ,即将连续色调的数字图象转换为由半色调网点构成的二值图。不同的输出设备要求的半色调网屏频率不一样。

When using printing equipment to print digital imagine we must translate this kind of imagine into halftone picture at first. But different printing equipment has different device resolution. In this article we discus about the relationship between screen resolution and printing device.