Finally, the color image reconstruction is applied on modified RGB channels to get watermarked
color image IW.
PSNR is a better test to check distortions between original image and watermarked
image because it uses mean squared error also.
data may undergo certain types of attacks before being reached to the detector or extractor.
It is through the integrity of the extracted watermark that we can tell whether the watermarked
image has been changed or manipulated.
where MSE is the mean square error between the original image and the watermarked
image, and MAXI is the maximum pixel value of the image which is equal to 255 in our implementations since pixels were represented using 8 bits per sample.
Distribution not only involves distributing the watermarked
content but also highlights the issues of the usage model: how the content owner wants users to use the marked content and what capabilities he or she is willing to provide those users.
The resultant watermarked
primary watermark image (obtain from the previous sub-section) is the watermark for the host image and it is used for the following embedding algorithm.
Standard watermarking [ILLUSTRATION FOR FIGURE 5a OMITTED] involves the creation of a watermarked
image by encoding a signature into an original image.