天津科技大学学报2012，Vol.27Issue(2)：65-69,5.
基于莫尔效应的半色调图像处理防伪方法
Moiré Effect Based Halftone Image Processing Method of Security
赵小梅 1谢兵1
作者信息
- 1. 天津科技大学包装与印刷工程学院,天津300222
- 折叠
摘要
Abstract
A halftone image processing method of security based on Moir(e) effect was developed. On the theoretical basis of Moir(e) effect and information hiding in halftone images, some images and text information were hidden in the pre-copy color images, and then the images were produced by means of laser printers and traditional printing proof. The experimental results show that when the specific detecting film is in the right angle and position, the hidden graphic information can be clearly observed. In the security experiment of the laser printed matters, the security effectiveness of low-resolution halftone images (less than 600 dpi)is better than the high-resolution halftone images. In the security experiment of the presswork,the image with screen frequency at 175 lpi has the best security effectiveness and reproduction effectiveness. As to the security master image, through comparing the security effectiveness of C, M, Y and K. as the security master image respectively, it is found that C and M can give better results. The graphic information is more easily observed when hidden in the mid-tone or the light part of the security master image.关键词
莫尔效应/半色调图像/信息隐藏/防伪Key words
Moir(e) effect/ halftone image/ information hiding/ security分类
轻工纺织引用本文复制引用
赵小梅,谢兵..基于莫尔效应的半色调图像处理防伪方法[J].天津科技大学学报,2012,27(2):65-69,5.
