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Type SCI
Year ~ Keyword


Conference Paper Blind watermarking method based on DWT middle frequency pair
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Lee Su Young, Han Seon Ok, Wen Gao, Joo Sanghyun
Issue Date
International Conference on Multimedia and Expo (ICME) 2002, pp.473-476
Project Code
02MR3500, Development of Digital Contents Management Technology, Hong Jin Woo
In this paper a novel watermarking method based on the discrete wavelet transform (DWT) is proposed. Different from previous watermarking methods, the watermark is embedded into the middle frequency coefficients by quantizing the middle frequency coefficient pair, which is defined as a pair of coefficients that are at the same location in the LH and HL bands of the DWT coefficients. This watermarking technique can successfully resist severe transformation of gray levels while it is still robust to normal attacks such as blurring, sharpening and JPEG compression. In detection, it does not need the original image to recover the watermark.
KSP Keywords
Blind watermarking, DWT coefficients, Discrete wavelet transform(DWT-EE), Gray level, Jpeg Compression, Watermarking methods, Wavelet transform(WT), watermarking technique