关键词: WLD特征, DCT变换, 盲水印算法, 鲁棒性

Abstract:

This paper proposes a blind watermarking scheme based on the WLD features. The watermark information is a robust and security binary sequence, with the result of successively encoding, encryption operation based on WLD features. The sector partition scheme and embed watermark in introduced into the DCT frequency domain. Based on WLD global statistical characteristics, the watermark can be extracted and authenticated with out the aid of the host image. Experiments show that the watermark has a good invisibility with a good robustness to additive noise, gamma correction and shear operations. As a blind robust watermarking algorithm, our scheme offers convenient image authentication.

Key words: WLD features, DCT transform, blind image watermarking, robustness