id: 06097795
dt: j
an: 06097795
au: Chen, Xia; Wang, Xi-Chang; Zhang, Hua-Ying; Liu, Jiang
ti: Zero watermark algorithm for binary document images based on texture
    spectrum.
so: J. Comput. Appl. 31, No. 9, 2378-2381 (2011).
py: 2011
pu: Science Press, Beijing
la: ZH
cc: 
ut: binary image; zero watermark; texture spectrum; copyright protection
ci: 
li: doi:10.3724/SP.J.1087.2011.02378
ab: Summary: Concerning the copyright protection of binary document images, a
    zero watermark algorithm was proposed. This algorithm constructed the
    texture image based on Local Binary Pattern (LBP), and then zero
    watermark information was constructed from the texture spectral
    histograms of the texture image. This method had a better invisibility
    compared to other text image watermarking, and the original image
    information would not be changed. Watermark attacks including image
    cropping, adding noise and rotation operators were tested. The
    experimental results show that the proposed zero watermark algorithm
    has a good performance in robustness. And these attack operators have
    little impact on zero watermark information, and the algorithm is of
    stability with the lowest standard correlation above 0.85.
rv: