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Abstract
Problem statement: Nowadays, digital watermarks have recently become recognized as a solution for protecting copyright of the digital multimedia. For a watermark to be useful, it must be perceptually invisible and robust against any possible attack and image processing by those who seek to corsair the material, researchers have considered various approaches like JPEG compression, geometric distortions and noising. Approach: We proposed a framework based on the Hartung technique which depended on spread spectrum communication in discrete cosine transform (DCT). Results: For the experimental results, researchers had considered various approaches: JPEG compression, geometric distortions and noising. Results showed a good performance in the proposed method. Conclusion: The presented technique was applicable not only to MPEG-2 video, but also to other DCT coding videos like MPEG-1,H261 and H263. Future study could be on improving DCT and comparing it with existing methods. It could be on discrete wavelet transform that is relatively new and has useful properties for the image processing applications.
Highlights
Digital watermarking has recently become a popular area of research due to the proliferation of digital data in the Internet and the need to find a way to protect the copyright of these materials
We have demonstrated that the discrete cosine transform (DCT) resembles the human visual system
There are many digital watermarking techniques developed in recent years, the capability of the traditional watermarking techniques is yet to develop completely
Summary
Digital watermarking has recently become a popular area of research due to the proliferation of digital data (image, audio, or video) in the Internet and the need to find a way to protect the copyright of these materials. Digital watermark is a code that is embedded inside some innocent-looking cover data This information is required to be robust against any intentional removal by malicious parties. Watermarking has existed since approximately the 13th century and the past watermarks were used on the papers to identify the mill which made them[3].The oldest watermarked paper was found in archives dates back to 1292 and it originated from the town of Fabriano in Italy, which has played a major role in the evolution of paper industry. After their invention, watermarks quickly spread in Italy and all over Europe. Physical watermarks are commonly used to authenticate important documents such as banknotes and passports
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