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Blind Watermarking Using HVS and Wavelet Transform  

주상현 (한국전자통신연구원 디지털저작권관리연구팀)
이선화 (한국전자통신연구원 디지털저작권관리연구팀)
Abstract
In this paper, we propose a blind watermarking that embeds watermarks into wavelet middle frequency subbands using human visual system. Wavelet middle frequency pairs(MFP) show similar distortion against general image processing attacks such as compression and filtering. So the quantization between MFPs is more robust than conventional methods that directly quantize DWT coefficients. We use a noise visibility function(NVF) to obtain a good visual quality This is able to preserve embedding positions after many attacks. Our experimental results show that the proposed scheme is robust to various image processing such as JPEG, while preserving good visual quality above 44㏈.
Keywords
HVS(human visual system); wavelet transform; middle frequency pair; blind watermarking.;
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