杨熙,王琪,高晴华,韩雪莹.分通道拼接潜像光栅防伪方法[J].包装工程,2016,37(21):192-197.
YANG Xi,WANG Qi,GAO Qing-hua,HAN Xue-ying.Sub-channel Grating Anti-counterfeiting Based on Splice Latent Image[J].Packaging Engineering,2016,37(21):192-197. |
| 分通道拼接潜像光栅防伪方法 |
| Sub-channel Grating Anti-counterfeiting Based on Splice Latent Image |
| 投稿时间：2016-05-03 修订日期：2016-11-10 |
| DOI： |
| 中文关键词: 相位调制法 光栅防伪 数字加网 |
| 英文关键词: phase modulation grating anti-counterfeiting digital screening |
| 基金项目:江苏省制浆造纸科学与技术重点实验室开放基金（201513） |
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| 中文摘要: |
| 目的 根据潜像信息嵌入的通道不同，产生的隐藏和提取效果会存在差异的原理，研究一种拼接潜像分通道嵌入的相位调制光栅防伪技术。方法 将蝴蝶形态的潜像分割成对称的左右2个部分，在CMYK 4个通道两两成组分别嵌入潜像的左侧部分和右侧部分，无缝对接形成完整的防伪信息；对整体潜像隐藏性进行主客观评价，证明K版的不适用性；设计与不同加网线数宿主图像所对应的数字光栅，提取隐藏信息，潜像显著性好。结果 分通道拼接潜像法有良好的防伪效果，其中潜像的两部分分别位于C版和M版时其隐蔽性与提取显著性均最佳，K版不适合作为防伪信息的嵌入通道，宿主图像的加网线数对拼接潜像的防伪效果无明显影响。结论 该研究成果实现了潜像的双通道参与，提高了工艺的复杂性，增强了仿伪效果，为相位调制潜像防伪技术提供了新的理论。 |
| 英文摘要: |
| The work aims to research the grating anti-counterfeiting technology of phase modulation based on splice latent images embedded into sub-channels according to the working principle of difference in hidden and extraction effects caused by different channels in which the latent image information was embedded. The butterfly-like latent image was divided into two symmetrical parts. As to the four channels of CMYK, two channels of them could form a group and be respectively embedded into both parts, so as to seamlessly splice and form the complete anti-counterfeit information. The concealment of the latent image as a whole was evaluated in subjective and objective methods to prove the non-applicability of channel K. Digital grating corresponding to the host image with different number of screening lines was designed to extract the hidden information. In such case, the conspicuousness of latent images was good. Sub-channel splice latent image method had good anti-counterfeiting effects. When both parts of the latent image were respectively located at channels C and M, their concealment and extraction conspicuousness were the best. Channel K was not suitable to be used as the embedded channel of anti-counterfeiting information. The number of screening lines of host image had no significant impact on the anti-counterfeiting effects of the splice latent image. In conclusion, this study provides a reference method for two channels. It can increase process complexity, strengthen the anti-counterfeiting effects and provide new theory for the latent image anti-counterfeiting technology of phase modulation. |
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