激光与光电子学进展, 2019, 56 (16): 161003, 网络出版: 2019-08-05
基于边界调整的潜像隐蔽性优化方法 下载: 747次
Optimization of Latent Image Concealment Based on Boundary Adjustment
图像处理 相位调制 边界网点 隐蔽性 提取性 image processing phase modulation boundary dots concealment effect extraction effect
摘要
针对相位调制潜像防伪技术中存在嵌入的潜像隐蔽性不佳,影响图像显示效果的问题,提出了对潜像局部网点进行调整的方案,以获得更优的潜像隐蔽质量。运用韦伯定律分析潜像区与对应母版区的网点排列特征,发现潜像内部区域对潜像隐蔽性无影响,而潜像轮廓区域对其整体隐蔽性影响较大。在研究潜像轮廓区网点位置分布特性的基础上,推导出能够提高潜像隐蔽性的边界网点调整算法,确定网点的位移量、补偿位置及面积调整系数,并进行实验验证。结果表明,该优化方法在保证潜像提取显著性的前提下,隐藏性能明显高于传统相位调制法。本研究为相位调制潜像防伪技术提供了新的优化方案。
Abstract
Focusing on the instability of concealment and display that occurs when embedding a latent image via a phase modulation technique, a scheme was proposed to obtain good anti-counterfeiting quality by adjusting latent image boundary dots. Weber law was used to analyze the dot arrangement characteristics of a latent image area and the corresponding hidden layer. Results indicate that the inner dots of the latent image did not affect the concealment, whereas the boundary dots had a great impact on its overall concealment. The boundary adjustment method was deduced based on the boundary dot location distribution; thus, the displacement, compensation position, and area adjustment coefficient were determined. Results show that the improved method outperformed the conventional phase modulation method under the premise of ensuring ensuring extracting effect, and provide a new optimization scheme for the grating anti-counterfeiting technology.
韩雪莹, 王琪, 葛乃馨. 基于边界调整的潜像隐蔽性优化方法[J]. 激光与光电子学进展, 2019, 56(16): 161003. Xueying Han, Qi Wang, Naixin Ge. Optimization of Latent Image Concealment Based on Boundary Adjustment[J]. Laser & Optoelectronics Progress, 2019, 56(16): 161003.