A fragile watermarking based on the triplet of wavelet coefficients

A novel fragile watermarking approach based on the triplet of wavelet coefficients is proposed and defined. The standard deviation of three wavelet coefficients in the triplet of wavelet coefficients is divided by a prespecified threshold, and watermark bit is embedded by the quantization of the rem...

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Bibliographic Details
Main Authors: HE, Quan, HE, Suqin
Format: Conference Proceeding
Language:English
Subjects:
Applied sciences
Chemical technology
Chemistry
Cryptography
Discrete wavelet transforms
Exact sciences and technology
Filtering
Frequency
Helium
Image coding
Image processing
Information, signal and communications theory
Robustness
Sampling, quantization
Signal and communications theory
Signal processing
Signal representation. Spectral analysis
Signal, noise
Telecommunications and information theory
Watermarking
Wavelet coefficients
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Summary:A novel fragile watermarking approach based on the triplet of wavelet coefficients is proposed and defined. The standard deviation of three wavelet coefficients in the triplet of wavelet coefficients is divided by a prespecified threshold, and watermark bit is embedded by the quantization of the remainder resulted from this division operation. Experimental results show that the proposed algorithm can point out the tamper-existing region and the extent of tampering. And the method is robust to common image processing operations such as JPEG lossy compression and median filtering, etc.
DOI:10.1109/ICOSP.2004.1442239