The halftone algorithm of color image, including screen angle adjustment, threshold matrix selection and the shape of screen dot design are discussed in this paper. And the simulation with laser printer proves that the algorithm is correct.

• 分析了彩色图象的半色调算法，包括加网角度的调整、阈值矩阵的选取及网点形状的设计，并在激光印字机上进行了模拟，说明算法是正确的。