关键词: 半易损性水印 离散小波变换 神经网络

Abstract:

A linear-neural-network-based semi-fragile watermarking technique is proposed in the paper. The method establishes a relational model among these coef  ficients and other coefficients in their vicinities in the low frequent band using linear neural networks. Based on the linear neural network model, wat ermarks can be extracted only with the parameters of the model without the participation of the original image and watermarks. Experimental results show  the proposed method can not only locate the tempered areas exactly but also resist the jPEG compression.

Key words: （semi-fragile watermarking, discrete wavelet transform, neural network）