並列タイトル等DCT オヨビ VQ ヲ モチイタ ガゾウ デンシ スカシ
Digital watermarking for images using DCT and VQ
タイトル(掲載誌)愛知工業大学研究報告 = Bulletin of Aichi Institute of Technology
一般注記This paper describes two digital watermarking methods using DCT (Discrete Cosine Transform) and VQ (Vector Quantization). A bi-level (1 bit/pixel) watermarking image has been embedded in target gray scale images. In the DCT watermarking method, DCT coefficients of target gray scale images are modified by watermarking information 1/0. In the VQ watermarking method, a VQ code book is divided to 2 groups which are assigned to watermarking information 1/0, respectively. Experiments have been carried out. The SNR (Signal to Noise Ratio) of embedded target images and the BER (Bit Error Rate) of extracted watermarking information have been studied. Our Experimental results have shown that the DCT method is superior to the VQ method.
identifier:http://repository.aitech.ac.jp/dspace/handle/11133/1555
一次資料へのリンクURLhttp://repository.aitech.ac.jp/dspace/bitstream/11133/1555/1/%e7%b4%80%e8%a6%8147%e5%8f%b7%28P237-245%29.pdf
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース(IRDB)(機関リポジトリ)