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Efficient Techniques for Digital Watermarking


S. R. Jayapriya , Gobi Arts And Science College; P. Narendran, Gobi Arts And Science College


Watermarking, Robust, Quantization index modulation (QIM)


Digital watermarking is a pattern of bits inserted into a digital image, audio or video file that identifies the file's copyright information (author, rights, etc.). The purpose of digital watermarks is to provide information such as copyright protection, source tracking, hidden communication, broadcast tracking for intellectual property that is in digital format. Digital watermarking analysis has two different categories of watermarks, (i) sturdy and (ii) fragile. Sturdy watermarks area unit is designed to be detected even if one tries to get rid of them. Fragile watermarks area unit used for authentication functions and area unit is capable of sleuthing even minute changes of the watermarked content. Digital watermarks are designed to be completely invisible, or in the case of audio clips, inaudible. Moreover, the actual bits representing the watermark must be scattered throughout the file in such a way that they cannot be identified and manipulated. And finally, the digital watermark must be robust enough so that it can withstand normal changes to the file, such as reductions from lossy compression algorithms. The proposed method is quantization index modulation (QIM).

Other Details

Paper ID: IJSRDV3I70396
Published in: Volume : 3, Issue : 7
Publication Date: 01/10/2015
Page(s): 611-613

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