提出了一種在經(jīng)過4 級小波變換的原始圖像中嵌入水印的算法。根據(jù)人類視覺特征來決定嵌入水印的強(qiáng)度，用秘鑰來決定水印嵌入的位置，通過使用訓(xùn)練的RBF 神經(jīng)網(wǎng)絡(luò)來嵌入和提取水印。實驗結(jié)果表明：該算法簡單有效，且對常見的圖像處理具有較好的魯棒性。
關(guān)鍵詞：小波變換； RBF 神經(jīng)網(wǎng)絡(luò)；人類視覺特征；數(shù)字水印
Abstract: This paper proposed a blind watermarking scheme in which a watermark is embedded into the 4-level discrete wavelet transform domain .The watermark insertion strength is decided by the Human Visual System .The watermark location is decided by the secret key .The trained RBF neural networks is used to embed and extract watermark.. The experimental results show the effectivity and robustness of the digital watermark.
Key words: Discrete wavelet transform; Radial basis function neural network; Human Visual
System; Digital watermark