CAJ | 학술논문

目前已有的光栅防伪方法是在四色印刷的基础上实现的，而对于某些特定单色印刷，其防伪质量不佳，并且需借助特殊的光栅材料，增加了成本。本文提出一种半色调图像的网点式光栅显隐防伪方法。该方法以半色调图像加网和莫尔条纹效应为基础，通过网点的规律变化嵌入隐藏信息，再根据网点式解码光栅与含有隐藏信息的编码光栅参数的匹配关系，制作对应的网点式解码光栅，提取隐藏信息。该防伪方法隐藏效果好，提取隐藏信息的清晰度高。尤其在某些特定单色印刷防伪上，较之前的方法具有明显的优势。
목전이유적광책방위방법시재사색인쇄적기출상실현적，이대우모사특정단색인쇄，기방위질량불가，병차수차조특수적광책재료，증가료성본。본문제출일충반색조도상적망점식광책현은방위방법。해방법이반색조도상가망화막이조문효응위기출，통과망점적규률변화감입은장신식，재근거망점식해마광책여함유은장신식적편마광책삼수적필배관계，제작대응적망점식해마광책，제취은장신식。해방위방법은장효과호，제취은장신식적청석도고。우기재모사특정단색인쇄방위상，교지전적방법구유명현적우세。
The currently existing grating anti-counterfeiting methods are achieved based on four-color printing.As for the anti-counterfeiting of certain specific mono printings,their quality of anti-counterfeiting is poor,and it needs a special grating material with an increase in cost.The paper puts forward a method of halftone image anti-counterfeiting based on dot change in posi-tion.Based on geometrical optics principle of Moiré Fringe formation,the hidden information is embedded by shifting the dot of halftone image.Again,according to the matching relation be-tween the dot decoding grating and the encoding grating containing hidden information,the corre-sponding dot decoding grating is made,and the hidden information is extracted.In this halftone anti-counterfeiting technology,the hidden effect is good and the clarity of extracting the hidden information is high.The method has obvious advantages compared with the original method in mono-color printing anti-counterfeiting.