Research on Realization Technology of'Signature in Signature'
Lei Ben · Jisuanji gongcheng · 2008
This article presents ‘signature in signature’,that is the concept of script digital signature,and proposes the direct mode and the mode that needs arbitration about ‘signature in signature’.Considering the characteristic of signature image,the watermark embedding methods about binary and gray images are studied,the possible flippability lookup table of pixels in binary image is found,and the 4-level gray expression way of the signature image is found.Experimental results indicate the proposed LSB watermark embedding method based on 4-level gray has the characteristics of large embedding capacity,good vision invisibility,simplicity and easy realization.