1 July 2008 New watermarking algorithm with data authentication and reduction for JPEG image
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J. of Electronic Imaging, 17(3), 033009 (2008). doi:10.1117/1.2954128
Abstract
This paper proposes a novel fragile watermarking algorithm, designated as the compression-watermarking algorithm (CWA), which inserts watermark information in a JPEG image by modifying the last nonzero coefficient in each discrete cosine transform (DCT) quantized block. The proposed algorithm not only provides an authentication capability, but also decreases the size of JPEG compressed-domain images. The experimental results show that CWA has virtually no impact on the visual quality of the watermarked images and is highly sensitive to image modifications. Furthermore, it is found that CWA reduces the size of watermarked image by as much as 6.3% when applied to the watermarking of standard JPEG test images. Therefore, CWA provides a feasible solution for image authentication and data reduction in DCT-based domains such as JPEG and MPEG-family coders/decoders.
Chuen-Ching Wang, Yu-Chang Hsu, "New watermarking algorithm with data authentication and reduction for JPEG image," Journal of Electronic Imaging 17(3), 033009 (1 July 2008). http://dx.doi.org/10.1117/1.2954128
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KEYWORDS
Digital watermarking

Image quality

Image processing

Image compression

Image transmission

Visualization

Digital imaging

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