@misc{oai:repo.qst.go.jp:00068151, author = {Mizuno, Yosuke and Nishio, Masato and Kawashima, Hironao and Ando, Yutaka and Tsukamoto, Nobuhiro and 水野 洋輔 and 安藤 裕 and 塚本 信宏}, month = {Jun}, note = {We developed the watermark method to identify the patient-ID and institution-ID. The image process-ing modified the watermark information and we recovered the watermark by the error correction meth-ods. We used the BIT-swapping method for embedding watermark. After image processing, the detec-tion ratio of the watermark was decreased. To correct the patient-ID and institution-ID, we used three type of methods, (1)Bose-Chandhuri-Hocquenghem code, (2)Majority correction method and (3)scramble location method. Once the detection ratio of watermark was decreased to 60%, we could recovery the watermark information. The peak signal to noise ratio was 39 dB at LSB-swapping. We think that these watermarking methods are suitable to the medical images., 19th International Congress and Exhibition of Computer Assisted Radiology and Surgery (CARS2005)}, title = {Improvement of digital starting pattern detection and image evaluation of digital watermarked images}, year = {2005} }