AN EFFICIENT IMAGE WATERMARKING SYSTEM BASED ON ERROR CORRECTING CODES IN DCT DOMAIN
DOI:
https://doi.org/10.47981/j.mijst.03(01)2011.27(%25p)Keywords:
Digital Watermarking, Linear Block Code, Copyright ProtectionAbstract
Digital watermarking has drawn extensive attention for copyright protection of multimedia data. This paper proposes a new
watermarking system for digital images using efficient systematic linear block codes (SLBC) in discrete cosine transform (DCT)
domain. The proposed watermarking system using SLBC generates a code sequence of {0, 1} that provides error correction
capabilities and then replaces it with a binary watermark sequence of {-1, 1}. This achieves more robust invisible image
watermarks and requires a small storage unit for binary sequence numbers. The generated watermark sequence is then used as an
input for our proposed watermarking system which consists of watermark embedding process and watermark detection process.
Experimental results indicate that the invisible watermark embedded with the proposed system are very robust against various
kinds of attacks such as white Gaussian noise, JPEG compression, median, and mean filtering, by showing similarity values
ranging from 0.7 to 0.8.
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