彩色图象半色调算法的分析与评价

The Analysis and Evaluation of Halftone Algorithm for Color Image

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。在此基础上，引入二维ＦＦＴ技术，对半色调误差图象的质量进行了分析研究。分析评价方法可以适用于其他半色调算法。

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. On the basis of which the two dimentional FFT technology is introduced to analyse the quality of error between the halftone image and the original image. The method of evaluation and analysis is also applicable to other halftone algorithm.