基于调幅加网的微观防伪网点算法研究

目的基于阈值矩阵的加网方法设计出具有微观结构防伪功能的艺术网点,并对潜在的应用价值进行探讨。方法研究分析最小阈值矩阵加网的算法及原理,对阈值矩阵进行改进,使其产生微观的艺术效果。结果可以实现在不同角度上微观艺术网点设计,计算机完成加网实验,在不同色版上都得到了具有微观艺术形貌的加网图像,而且四色重组后的印刷图像达到了理想的半色调化效果。结论基于最小阈值矩阵设计的微观艺术网点可以实现调幅加网在网点层次的防伪,建立了具有微观艺术效果的网点系统,并且与光栅防伪等其他的防伪技术相结合。

Algorithm of Micro Anti-counterfeiting Dot Based on AM Screening

This work was aimed to design the artistic dot with micro-structure anti-counterfeiting function based on the screening method with threshold matrix, and investigate its potential application value. The algorithm and principle of minimum threshold matrix were researched and analyzed, the threshold matrix was improved after screening to generate microcosmic artistic effect. Design of threshold matrix with microcosmic artistic dot was realized at different angles, and the screening experiment was completed with computer. The screening images with microcosmic artistic morphology were obtained on different color plates. After the recombination of the four plates, the printing image got the ideal halftone effect. The microcosmic artistic dot designed based on minimum threshold matrix could realize the anti-counterfeiting purpose in the dot layer of AM, the system of artistic dot with micro-structure was established, and can be combined with other anti-counterfeiting technologies such as grating anti-counterfeiting.