The invention discloses a multistage video
watermark embedding and extracting method and
system, and the method comprises the steps: carrying out the
perception analysis of an original video through a space-time attention neural network, and dynamically dividing a
time domain stable region and a space domain sensitive region; a three-level
watermark system is constructed, the three-level
watermark system comprises a basic-level watermark, a first-level enhanced watermark and a second-level enhanced watermark, the basic-level watermark adopts an anti-rotation binary matrix generated by a
Fourier descriptor, the first-level enhanced watermark is a DCT
frequency domain Hash sequence, and the second-level enhanced watermark is a semantic
fingerprint generated based on a
motion vector. According to the method, through multi-dimensional collaborative optimization of the anti-
attack capability, the dynamic security mechanism and the
verification efficiency, the core defects that erasing is easy due to insufficient reversibility in a traditional video watermarking technology and counterfeit affiliation chaos is caused by a
static key are overcome, and reliable technical guarantee is provided for
digital content copyright protection.