半色调图像的网点式光栅显隐防伪研究  

Research on halftone anti-counterfeiting technology based on dot grating

作　　者：郭凌华[1,2] 陈燕[1,2] 刘国栋[1,2] 邢铁豆 

机构地区：[1]陕西科技大学轻工与能源学院,陕西西安710021 [2]陕西科技大学陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021

出　　处：《西安理工大学学报》2015年第3期335-339,共5页Journal of Xi'an University of Technology

基　　金：陕西省教育厅重点实验项目(2011HBSZS014);陕西科技大学博士启动基金项目(BJ13-01);陕西省教育厅科研计划项目(14JK1108)

摘　　要：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。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 Moir＆#233; 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.

关 键 词：网点式光栅 半色调图像防伪 信息隐藏 光栅匹配 单色印刷 

分 类 号：TS853.6[轻工技术与工程]