参考：https://m.huanqiu.com/article/9CaKrnK5wh5
https://www.zdnet.com/article/how-these-hidden-video-watermarks-can-help-spot-piracy-doctored-images/
https://www.gbalaji.in/2013/08/07/why-we-need-invisible-watermarking-in-post-production/
https://myce.wiki/news/company-wins-emmy-for-anti-piracy-technology-successfully-used-to-find-movie-leakers-78332/
https://www.intechopen.com/chapters/71851
https://www.npr.org/templates/story/story.php?storyId=5151434
https://swiftmoves.blog/cameras-in-movie-theaters/
https://learncctv.com/are-there-security-cameras-in-movie-theaters/
https://safenow.org/are-there-cameras-in-movie-theaters/
https://help.eventive.org/en/articles/4813115-eventive-advanced-antipiracy
https://www.imatag.com/digital-watermarking/
https://baijiahao.baidu.com/s?id=1625860992138710370
https://www.youtube.com/watch?v=TLReJdvq87E
