三维物体多重菲涅耳计算全息水印与无干扰可控重建方法
发布时间：2018-08-01 14:05
【摘要】：提出了一种基于三维物体的多重菲涅耳计算全息水印方法.将水印信号作为虚拟三维物体的层面,首先结合分区复用层析法和菲涅耳双随机相位编码方法产生复噪声形式的水印信号;然后对水印信号的频谱作共轭对称处理实现实值编码;为减小对宿主全息图数字重建的影响,将水印信号的频谱设置于对宿主数字重建影响小的频谱非感兴趣区域;编码后的信号以一定强度叠加于宿主全息图,水印信号恢复无需原始宿主全息图信息,可实现盲提取,对宿主全息图重建像面的二维码可扫描识别.仿真测试结果表明,所提出的方法具有较好的透明性和稳健性,在宿主全息图遭受滤波、JPEG(联合图像专家小组)压缩、高斯噪声、剪切、旋转等各种攻击的情况下,不论对宿主还是水印信号仍具有良好的数字重建质量,对重建像面的二维码仍可扫描识别;而重建像面水印信号的无干扰可控重建后处理操作解决了不同层面水印信号之间的衍射干扰问题,提高了水印信号的重建质量.虚拟光学手段的应用丰富了水印信号设计方法并提升了算法的安全性.
[Abstract]:A multi-fold Fresnel holographic watermarking method based on three-dimensional objects is proposed. The watermark signal is regarded as the level of the virtual 3D object. Firstly, the watermark signal in the form of complex noise is generated by combining the partition multiplexing chromatography method and the Fresnel double random phase coding method. In order to reduce the influence on the digital reconstruction of the host hologram, the spectrum of the watermark signal is set to the region not interested in the frequency spectrum which has little effect on the host digital reconstruction. The encoded signal is superimposed on the host hologram with a certain intensity, and the watermark signal can be recovered without the original host hologram information, so blind extraction can be realized, and the two-dimensional code of the reconstructed image surface of the host hologram can be scanned and recognized. The simulation results show that the proposed method has good transparency and robustness. When the host hologram is subjected to various attacks, such as filtering JPEGs, Gao Si noise, shearing, rotation and so on, Both the host and the watermark still have good digital reconstruction quality, and the two-dimensional code of the reconstructed image surface can still be scanned and identified. The reconstruction of image surface watermark signal can solve the problem of diffractive interference between different levels of watermark signal and improve the quality of watermark signal reconstruction. The application of virtual optics enriches the design method of watermark signal and improves the security of the algorithm.
【作者单位】： 福建师范大学数学与信息学院;
【基金】：福建省自然科学基金(批准号:2017J01739) 福建师范大学基金(批准号:I201601004,I201602015)资助的课题~~
【分类号】：TP309.7;TP391.41
[Abstract]:A multi-fold Fresnel holographic watermarking method based on three-dimensional objects is proposed. The watermark signal is regarded as the level of the virtual 3D object. Firstly, the watermark signal in the form of complex noise is generated by combining the partition multiplexing chromatography method and the Fresnel double random phase coding method. In order to reduce the influence on the digital reconstruction of the host hologram, the spectrum of the watermark signal is set to the region not interested in the frequency spectrum which has little effect on the host digital reconstruction. The encoded signal is superimposed on the host hologram with a certain intensity, and the watermark signal can be recovered without the original host hologram information, so blind extraction can be realized, and the two-dimensional code of the reconstructed image surface of the host hologram can be scanned and recognized. The simulation results show that the proposed method has good transparency and robustness. When the host hologram is subjected to various attacks, such as filtering JPEGs, Gao Si noise, shearing, rotation and so on, Both the host and the watermark still have good digital reconstruction quality, and the two-dimensional code of the reconstructed image surface can still be scanned and identified. The reconstruction of image surface watermark signal can solve the problem of diffractive interference between different levels of watermark signal and improve the quality of watermark signal reconstruction. The application of virtual optics enriches the design method of watermark signal and improves the security of the algorithm.
【作者单位】： 福建师范大学数学与信息学院;
【基金】：福建省自然科学基金(批准号:2017J01739) 福建师范大学基金(批准号:I201601004,I201602015)资助的课题~~
【分类号】：TP309.7;TP391.41
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