关键词: 方向小波, Slant变换, 数字水印

Abstract: A content-based image watermarking algorithm is proposed. The watermarking is extracted by directional wavelet independently block-image. The watermarking is embedded into the middle frequency region of each block in the Slant transform domain by noise visibility function. Experimental results show that the proposed scheme is robust against the common signals processing and robust against usually geometric attacks, Furthermore, compared with the DCT and PST based schemes, the proposed method obtains better performance when malicious and non-malicious manipulations are applied together.

Key words: directional wavelet, Slant transform, digital watermark