Considering the problem that the current self-embedding watermarking algorithms are insufficient on detail-preserving

an integer wavelet transform combined with SPIHT algorithm is employed to implement a self-embedding watermarking algorithm for image content authentication. Wavelet transform can overcome the defect of Discrete Cosine Transform on image compression. And the characteristic of wavelet transform coefficients is taken into account

compression performance is enhanced and more image information is included of equivalent embedding capacity. In this way the watermarked image possesses not only good perceptual transparence but also better self-recovering capability compared with traditional techniques. For the SPIHT algorithm is an embedded coding algorithm

it can adjust the size of watermarking to change the embedding intensity according to the actual situation

which cannot be held by other methods. And Logistic map and cat map increase the security and ability of tamper localization of watermark. Finally

experimental results show the efficiency of the algorithm.