Resilience of Various Attacks on Watermarks Using Hybrid Video Watermarking Algorithm

Watermarking with unaffected detection and high robustness capabilities is still a challenging problem. The success of a digital watermarking technology depends greatly on its robustness to withstand attacks which are aimed at removing or destroying the watermark from its host data. This paper provides analysis of a number of digital watermark attacks and the experimental results are provided to show the effect of these attacks on watermarks using hybrid video watermarking technique based on DWT, DCT and SVD. The main idea of this paper is to develop an algorithm which can be robust to various attacks, that embeds the watermark information without much distortion to the host video by modifying the frequency coefficients of the frames, while making it possible to extract the watermark by using the inverse algorithm. Based on human visual systems perception of video content, which is used to embed a watermark such that its amplitude is kept below the distortion sensitivity of the pixel and thus preserving the video quality. The operation of embedding and extraction of the watermark is done in frequency domain, and it is checked for different signal processing, geometric and noise attacks. This paper has conducted a comprehensive research with special emphasis on the malicious attacks against digital watermarking.