TITLE:
Multiresolution Video Watermarking Algorithm Exploiting the Block-Based Motion Estimation
AUTHORS:
Salwa A. K. Mostafa, Abdelrahman Ali
KEYWORDS:
Digital Video Watermarking, Wavelet Transform, Motion Vector, Motion Estimation, Video Frame
JOURNAL NAME:
Journal of Information Security,
Vol.7 No.4,
July
20,
2016
ABSTRACT: This paper presents a novel
technique for embedding a digital watermark into video frames based on motion vectors
and discrete wavelet transform (DWT). In the proposed scheme, the binary image watermark
is divided into blocks and each watermark block is embedded several times in each
selected video frame at different locations. The block-based motion estimation algorithm
is used to select the video frame blocks having the greatest motion vectors magnitude.
The DWT is applied to the selected frame blocks, and then, the watermark block is
hidden into these blocks by modifying the coefficients of the Horizontal sub-bands
(HL). Adding the watermark at different locations in the same video frame makes
the scheme more robust against different types of attacks. The method was tested
on different types of videos. The average peak signal to noise ratio (PSNR) and
the normalized correlation (NC) are used to measure the performance of the proposed
method. Experimental results show that the proposed algorithm does not affect the
visual quality of video frames and the scheme is robust against a variety of attacks.