Abstract: Currently,because of the limitations of fragile watermarking on tamper recovery and transform,this paper presented a self-embedding watermarking algorithm based on dual-tree wavelet Transform．Tamper localization and ima-ge recovery are corresponding to authentication watermarking and recovery watermarking．The recovery watermarking is spiht coding after carrier image DDWT transform,and it is embed in the low-frequency of wavelet transform．The authentication watermarking is the relationship of low-frequency coefficients after recovery watermarking is embed,and it is embed in the image sub-block of lsb．The experimental results show that the algorithm can accurately locate the illegal tamper and has nice self-recovery ability.

Key words: DDWT,SPIHT,Self-embedding watermarking,Tamper localization,Image recovery