潜像信息嵌入率对光栅防伪效果的影响  

Influence of Information Embedding Rate on Anti-counterfeit of Parallax Barrier

作　　者：王琪[1] 王天马[1] 

机构地区：[1]南京林业大学,南京210037

出　　处：《包装工程》2016年第1期147-153,共7页Packaging Engineering

摘　　要：目的建立信息嵌入率与视觉感知阈值的关系模型,利用韦伯定律和图像显著性相关理论分析嵌入率对潜像隐蔽性和提取效果的影响。方法在特征不同的宿主图像中,以0.05为步长在(0,0.50]区间内的信息嵌入率完成防伪标识的隐藏与光栅检测提取,并用加权信噪比和彩色结构相似度评价隐蔽性、用信息熵函数和区域对比度评价提取显著性。结果潜像信息嵌入率与隐蔽性负相关,与提取显著性正相关;在潜像嵌入和光栅提取阶段,纹理复杂的亮调图像其防伪隐蔽性和显著性都最佳,信息嵌入率取值范围为R′∈[0.18,0.41],验证了理论分析的正确性。结论适用于大多数基于相位调制的光栅防伪技术。The relationship model of information embedding rate and visual perception threshold was constructed in this paper, then the Weber＇ s law and image saliency theory was applied to study the influence of the information embedding rate on imperceptibility and saliency of anti-counterfeit. Among various host images with different characteristics, the hiding and extraction of anti-counterfeit logo was implemented in range （0, 0.50] with step 0.05. The imperceptibility which resulted from the hiding process can be evaluated by WSNR and CISI indexes. The Z and Fi indexes were applied to analyze the outcome of extraction process. The latent image information embedding rate was negatively related to the imperceptibility while positively related to the saliency. During the hiding and extraction process of latent image, the bright image with complex texture acted best on both imperceptibility and saliency. The information embedding rate ranged from 0.18 to 0.41, indicating that the theoretical analysis was correct. The embedding rate was applicable to most grating anti-counterfeiting technology based on phase modulation.

关 键 词：信息嵌入率 光栅防伪 数字加网 人眼视觉特性 

分 类 号：TS801[轻工技术与工程]