キノシタ ヒロツグ   Kinoshita Hirotsugu
  木下 宏揚
   所属   神奈川大学  工学部 電気電子情報工学科
   職種   教授
言語種別 日本語
発行・発表の年月 2006/02
形態種別 学術雑誌
査読 査読あり
標題 有料放送のための画像特徴を考慮した可視型電子透かし
執筆形態 共著
掲載誌名 映像情報メディア学会誌
巻・号・頁 60(2),pp.192-199頁
著者・共著者 沖原健一, 稲積泰宏, 木下宏揚
概要 Pay-TV, which allows viewers to select the programs they want to watch, is commonly available. A viewer wants to buy a desired program after he/she understands its content. A broadcaster wants to protect a program's content and advertize during the program. Existing pay-TV service is not able to meet both requirements. We developed a method for embedding visible watermarks that satisfies both viewers and broadcasters on pay-TV. The visible watermark is embedded in a program for copyright protection and advertizing purposes. In addition, the logo of the watermark is split into two keys. The broadcaster has one key, and the other key is embedded in unnoticeable regions of the program. The broadcaster is thus able to remove the visible watermark by using the key. Furthermore, the method is resistant to attack by the removal of the visible watermark because it is changed by image features temporally. Experimental results show that understanding the content of a program is possible from a sample image. In addition, the image that is produced is comparable to the original image.