vc＋＋的小波类 能够完成一维二维小波变换等，还可以实现逆变换-vc + + Wavelet category to complete a two-dimensional wavelet transform, and can be achieved inverse transform

In this paper we propose a watermarking system that uses the biorthogonal discrete wavelet transform, DWT and the message is encoded before embedding. The proposed watermarking method is very simple, implying four steps: turbo coding of