Efficient Digital Watermarking Algorithm Using Frequency Transform

Abstract

There is a blast of data exchange on the internet and the large use of digital media. So, digital data owners can quickly and massively transfer multimedia documents through the Internet. It has cause intense interest in multimedia security and multimedia copyright protection. In this paper, a comprehensive approach protecting and managing image,audio and video copyrights with water-marking techniques is introduced.We propose a efficient digital water-marking scheme based on the scene change analysis, error correction code. Our digital water-marking algorithm is robust against the attacks of frame cascading, averaging and statistical analysis, which were not fixed effectively in the past.It started with a complete survey about current watermarking technologies. We have discovered that none of the existing schemes was admit of with-stand all attacks. Accordingly, we came up with the idea of embedding a single watermark of different parts into different images,audios and videos. Then we analyze the strength of different water-marking schemes. It optimizes the quality of the water-marked images ,audios and videos. Also, our scheme allows blind recovery of the embedded watermark, which does not need the original images ,audios and videos and the watermark is perceptually invisible.