Spatial video watermarking algorithm based on<br /> human visual system and DCT<br />
Journal Title: Science Paper Online - Year 2010, Vol 5, Issue 2
Abstract
We propose a novel video watermark algorithm based on the visual characteristics of block DCT direct current (DC) coefficient which considers the JND model in human visual system (HVS). In order to meet the invisibility and robustness of video watermarking, the proposed method utilizes the stability of DC coefficient. First, we gather all the DC coefficients in luminance blocks to form a sequence, and then divide the sequence into many sub-sequences, on which we use 1D-DCT respectively. Second, the highest frequency coefficient of each sub-sequence is chosen to embed the watermark message by the spread spectrum (SS) method, where the JND model is adopted to dynamically adjust the embedding strength. Experimental results indicate that proposed algorithm makes a good tradeoff between invisibility and robustness compared with the algorithm with fixed embedding strength. In addition, this algorithm has good robustness to video compression attacks at different bit-rate, also resists some common attacks, such as frame deleting, some common signal processing and geometric transformation.
Authors and Affiliations
Shaohui Liu, Jiguang Wang, Feng Shi
Keywords
Related Articles
- EP ID EP107799
- DOI -
- Views 124
- Downloads 0
具有特殊尺寸机器人的位置反解算法
针对特殊尺寸串联机器人的种类较多，每一个机器人单独编程，求解比较繁琐，尚没有统一运动学计算方法的问题，尝试利用一般6R 机器人的位置反解程序进行求解。通过把特殊尺寸进行微小调整，避免了采用一般尺寸6R 机器人的反解程序进行特殊...
一种股骨头假体设计方法
为解决人工髋关节置换手术后假体无菌松动等并发症，适应假体个性化快速设计和制造的需求，采用医用CT技术、计算机辅助设计和有限元计算分析相结合的方法，依据患者股骨髓腔解剖形状和置换要求设计髋关节假体。用有限元软件ANSYS建立股骨...
废旧阻燃电脑外壳的热解动力学
通过对含有四溴双酚A阻燃剂(tetrabromobisphenol A, TBBPA)的废旧电脑外壳（红外分析鉴定为丙烯腈-丁二烯-苯乙烯树脂，acryolonitrilr butadiene styrene, ABS）进行热裂解试验和动力学研究，得到不同升温条件下（5 K•min-1, 10 K•min-1,...
Centrifugal cast microstructure of semisolid hypereutectic high chromium cast iron and its quantitative Analysis
For the semisolid slurry of hypereutectic high chromium cast iron prepared by slope cooling body method, it is fabricated into the semisolid annular part by centrifugal casting method in this paper. The microstructure is...
Study on the content of Cognitive Pilot Channel for network selection in heterogeneous networks
Based on the Cognitive Pilot Channel (CPC) concept proposed in the European project E2R, a further study on the content of CPC is proposed in this paper. CPC broadcasts the performance parameters of the Radio Access Tech...