Geometrical attacks can cause the loss of synchronism between the watermarking embedding and the detection，thus have negative effect on watermark detection. To solve the synchronism problem caused by geometrical attacks

features of the steerable pyramid coefficients are used to estimate the rotation of the watermarked image

then adaptive wavelet tree modulation employing normalized wavelet tree entropy mask and contrast sensitive function is applied to embed the watermark. Owing to the super tree algorithms ability of resistance to scaling attack and adoption of steerable pyramid

the proposed algorithm can resist both scaling attacks and rotating attacks. The simulation result indicated that the proposed algorithm can efficiently resist geometric attacks.