A Novel Optimized Graph-Based Transform Watermarking Technique to Address Security Issues in Real-Time Application

Algorithm 4

Watermark extraction algorithm.

	Input: watermarked video
	Output: recovered watermark
	Begin
(1)	Take watermarked video
(2)	for frames from 1 to k
(3)	{
(4)	Perform layer separation on RGB frame
(5)	Apply GBT transform on each layer of .
(6)	Apply SVD and extract USV feature of each layer of .
(7)	Extract watermark from using formula =(−)/α
(8)	Extract S value.
(9)	Perform inverse SVD to combine S value with USV of each layer
(10)	Perform inverse GBT transform
(11)	Decrypt watermark using key
(12)	Repeat steps from 4 to 12 till all the watermarks on selected frames are extracted.
(13)	}
	End