チョウ ゼンシュン   Zhang Shanjun
  張 善俊
   所属   神奈川大学  理学部 情報科学科
   職種   教授
言語種別 日本語
発行・発表の年月 2008/05
形態種別 大学・研究所等紀要
査読 査読あり
標題 DWT-based Watermarking Using QR Code
執筆形態 共著
掲載誌名 Science Journal of Kanagawa University
巻・号・頁 19(1),3-6頁
著者・共著者 Shanjun Zhang, Kazuyoshi Yoshino
概要 In this paper, we introduce a novel watermarking method to embed QR codes in digital images. The method is based on discrete wavelet transform. The original image is devided into blocks, and QR codes are added to particular bits of LL2 level coefficients of the selected bolock according to the visual masking effect of human visual system. The method is shown to be robust for JPEG compression and has good tranparency. the embedded information can be correctely extracted even if the images are compressed to 11% of the original according to the contentes of the image.