In order to improve the security of the printed image

and maintain the copyright of the printed image

this paper proposes a new image watermarking technique which is invisible and robust. First the watermark information of scrambling operation

then the scale invariant feature transform operators are constructed from the carrier image watermark embedding feature region

and select the wavelet transform of intermediate frequency sub band wavelet coefficient as the embedding position

finally the image watermark embedding test. Experimental results show that this algorithm can resist noise

scaling and other kinds of attacks and embedded watermark has good invisibility

a better solution to the existing problems in the current printing image watermarking technology

has a high practical value.