Digitai haiftoning refers to any algorithmic process which creates the iiiusion of continuous - tone images from the judicious arrangement of binary picture eiements . it is often called spatiai dithering 数字半色调处理是一种用经过精心计算排列的二进制图形元素来表现一个连续色调图像的算法处理过程，它也称为空间抖动。
