A perfectly blind robust quantization-based watermarking scheme in DWT-SVD (discrete wavelet transformation-singular value decomposition)domain is proposed by introducing the self-embedding technology.It can accomplish copyright authentication only resorting to the attacked image. The original image is conducted with DWT

and its low frequency wavelet band is split into non-overlapping blocks. Afterwards

each block is conducted with SVD. A feature watermark sequence is derived through judging the numerical relationship between the two biggest singular values of adjacent blocks. Moreover

the chosen feature watermark sequence is self-embedded into each block’s biggest singular value from the original image’s low frequency wavelet band based on the Principle of odd-even quantization. Finally

a watermarked image is obtained after SVD synthesis and IDWT. The proposed algorithm has good invisibility and security

and achieves perfectly blind detection by combining self-embedding feature watermark sequence and blindly extracting authentication watermark sequence. Experimental results show that the proposed algorithm has strong robustness towards adding Gaussian noise

adding salt and pepper noise

Gaussian low-pass filtering

median filtering

cropping

JPEG compression

and hybrid attacks.