Research Article

A Novel Printable Watermarking Method in Dithering Halftone Images

Table 6

Quality comparisons of three different kinds of pair selections using Pei-Guo-PSNR [12] and scores and [14].

SelectionThe 1st selection used in Guo et al. [12] with The 2nd selection used in the proposed method with The 3rd selection with
ImagesQuality
Pei-Guo-PSNRPei-Guo-PSNRPei-Guo-PSNR

Lena30.781.3748029.241.0620428.262.2612967
Mandrill27.302.24320127.321.59275826.542.3616866
Earth27.062.07277228.171.28123328.452.096841
Tiffany31.061.1218929.061.0315928.821.701981
Shuttle27.661.90213428.081.2087128.122.1810062
Peppers30.341.4675529.001.0838128.252.1810525
Milk31.041.3252929.631.0212928.652.1710080
Lake28.151.88196728.151.1385728.341.955753

Average29.171.671503.428.581.1782428.182.119384.4