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首页> 外文期刊>WSEAS Transactions on Signal Processing >New Multipurpose Oriented Stereo Image Watermarking Algorithm for 3D Multimedia
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New Multipurpose Oriented Stereo Image Watermarking Algorithm for 3D Multimedia

机译:面向3D多媒体的新型多功能立体图像水印算法。

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摘要

Most of digital watermarking algorithms have been designed for only single purpose. In this paper, a new multipurpose oriented stereo image watermarking algorithm is proposed for three dimensional multimedia, which can be used for copyright protection, content authentication and tamper detection in three dimensional (3D) multimedia. Specifically, host stereo image is divided into non-overlapping blocks, and the chaotic feature watermarks are generated according to the stability of low frequency coefficients and largest singular value. As there are redundancies between the left and right views of stereo image, each block of the two views is classified into matchable or non-matchable block to embed digital watermarks with different purposes. At the receiving side, using stereo marching technique as a bridge, the robust and fragile watermarks can be blindly extracted without access to the host stereo image. Meanwhile, the robustness of stereo image watermarking is improved, and a hierarchical tamper detection scheme is presented to ensure the accuracy of tamper localization. Especially, Level-2 detection is employed to improve previously obtained detection results to enhance authentication accuracy. Experimental results show that the proposed algorithm is quite robust to attacks, such as noise, filtering, JPEG compression, cropping and size scaling. Moreover, the experimental results also show that the proposed algorithm can detect tamper accurately and locate forgery effectively.
机译:大多数数字水印算法仅被设计用于单一目的。提出了一种新型的面向立体多媒体的多用途立体图像水印算法,该算法可用于三维(3D)多媒体的版权保护,内容认证和篡改检测。具体地,将主机立体图像划分为非重叠块,并且根据低频系数和最大奇异值的稳定性来生成混沌特征水印。由于立体图像的左视图和右视图之间存在冗余,因此将两个视图的每个块分为可匹配块或不可匹配块,以嵌入具有不同用途的数字水印。在接收侧,使用立体声行进技术作为桥梁,可以在不访问主机立体声图像的情况下盲目提取出健壮和脆弱的水印。同时,提高了立体图像水印的鲁棒性,提出了一种分层篡改检测方案,以保证篡改定位的准确性。特别地,采用Level-2检测来改善先前获得的检测结果以增强认证准确性。实验结果表明,该算法对噪声,滤波,JPEG压缩,裁剪和尺寸缩放等攻击具有很强的鲁棒性。实验结果还表明,该算法可以准确地检测出篡改并有效地定位伪造。

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