Browsing by Author "Mahenthirarasa, T"

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    Approach for general lossless visible watermarking
    (Information Technology Research Unit, Faculty of Information Technology, University of Moratuwa, Sri Lanka, 2017-12) Mahenthirarasa, T; Ranathunga, L; Amalraj, CRJ; Sudantha, BH
    the impact of the Internet has influenced in many new circumstances for the creation and delivery of content in digital form. An important issue that arises in these applications is the protection of the rights of all participants. It has been recognized for quite some time that current copyright laws are inadequate for dealing with digital image. This has led to an interest towards developing new copy deterrence and protection mechanisms. One such effort that has been attracting increasing interest is based on digital image watermarking techniques. Digital image watermarking is the process of embedding information into digital image content such that the information can later be extracted or detected for a variety of purposes including copy right protection and control. A visible watermark typically consists of a conspicuously visible message or a company logo indicating the ownership of the image. The system is designed for choosing best watermark for the cover image and three new algorithms for the visible watermarking process. Comparing and testing the three proposed algorithms is done in the evaluation process and highlight the best things of the algorithms proposed by using PSNR values.