Cryptography Reference
In-Depth Information
Fig. 13.12.
Classification structure.
decoding pattern which has a size of NN . We obtain the height and width
of the given image which may have been cropped and then compute the num-
bers
height
N
width
N
N . These calculated values are
deemed to be the height and width of the locating decoding pattern.
+1
N and
+1
Fig. 13.13.
General framework of the watermark detection scheme.
Stage 1: Locating
Align the top-left pixel of the given image with the top-left point of the
locating decoding pattern. Translate the given image using the locating
decoding pattern. Test all translations of the image against the locating
