Coverless Steganography Based on Motion Analysis of Video
Algorithm 4
Improved index database construction.
Input: video database , number of the videos d, frame averaging window length avg_L, smoothing window size for the optical flow calculation W, number of the LK pyramid level L, and bin number N
Output: video index database
(1)
For i = 1 : d
(2)
Decompose video to pictures: P = VideoToFrame (Vi)