WEKO3
アイテム
Digital watermarking based on discrete wavelet transform for medical image
https://repo.qst.go.jp/records/68559
https://repo.qst.go.jp/records/68559a8717b4c-8c03-491f-8afe-c1f12e5d20b5
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-07-03 | |||||
| タイトル | ||||||
| タイトル | Digital watermarking based on discrete wavelet transform for medical image | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Tsukamoto, Nobuhiro
× Tsukamoto, Nobuhiro× Ando, Yutaka× Kawaguchi, Osamu× Nakajima, Shohji× Mizuno, Yohsuke× Kawashima, Hironao× Hashimoto, Teisuke× Sawada, Hirohisa× 塚本 信宏× 安藤 裕× 川口 修 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In some hospitals, doctor transfers medical image to the patient with CD. Medical images are usually compressed by the manner of JPEG. It is convenient that digital watermark maintains the patient and exmination information. We developed digital watermarking based on discrete wavelet transform(DWT) for medical image. It is robust to JPEG and JPEG2000 compression. But peculiar artifact appears in DWT watermarked image. In this paper we mainly concerned about the artifact of DWT watermarked image. And discussed about the relationship between image quality and difficulty of making daignosis. The image quality was measured by PSNR. We used a chest X-ray image and a CT image of abdomen. The images of size 512x512 pixels and 256 gray scale are used. In discrete wavelet transform, biorthogonal(9,7) filter was used and the watermark was embedded by operating coefficients of LL3 subband. Pixel value changed, too, when the coefficients operated. And the operated amount grew, PSNR became small and robustness to compression was increased. The artifact looks like patchy infiltration of lung in the chest X-ray images, or focal fatty liver in abdominal CT. DTW watermarking interferes to make a diagnosis in less than 45dB in PSNR. Attention is necessary for the image quality deterioration caused by the watermarking, assume peculiar artifact watermark that used DWT | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | EuroPACS 2006 | |||||
| 発表年月日 | ||||||
| 日付 | 2006-06-17 | |||||
| 日付タイプ | Issued | |||||
