Robust watermarking method by systematic block diffusion using discrete cosine transform

Kazuo Ohzeki, Kazutaka Bannai, Yuan Yu Wei, Yutaka Hirakawa, Kiyotsugu Sato

研究成果: Paper査読

抄録

Digital watermarks have long been considered as a security feature. A watermarking method that involves the diffusion of limited watermark information into a large part of an image's data has high robustness. The diffused information is summed up to a single component before detecting the watermark. The summing up process eliminates small noises by an averaging effect, which improves the robustness of the embedded watermark against attack. In this field, thus far, only an asymmetrical Chirp transformation with a small block size has been attempted. In this study, a new verification experiment for a large block size of 256 × 256 pixels is conducted. High robustness of the proposed method is revealed. This includes the finding that, in the case of a JPEG compression attack, the proposed system is robust even at strong compression of 1/70. As for a clipping attack, embedded watermarks can be detected with up to seven-pixel clipping of an embedded image.

本文言語English
ページ112-121
ページ数10
出版ステータスPublished - 2014 1 1
イベント11th Australian Digital Forensics Conference, ADF 2013 - Perth, Australia
継続期間: 2013 12 22013 12 4

Conference

Conference11th Australian Digital Forensics Conference, ADF 2013
国/地域Australia
CityPerth
Period13/12/213/12/4

ASJC Scopus subject areas

  • 情報システム

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