[4] [4] WU C F,HSIEH W S.Image refining technique using digital watermarking[J].IEEE Transactions on Consumer Electronics,2000,46(1):1-5

[5] [5] NI R R,RUAN Q Q.A digital image hiding algorithm using Arnold transform[J].Journal of Northern Jiaotong University,2002,26(2):25-33

[6] [6] KUTTER M F,PETITCOLAS A P.Fair evaluation methods for image watermarking systems[J].Journal Electronic Imaging,2000,9(4):445

[7] [7] YEN J C.Watermark embedded in permuted domain[J].IEEE Electronics Letters,2001,37(2):80-81