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|1. (WO2017156760) METHOD AND SYSTEM FOR WRITING SECRET INFORMATION INTO VIDEO, AND VIDEO AUTHENTICATION METHOD AND SYSTEM|
|Title:||METHOD AND SYSTEM FOR WRITING SECRET INFORMATION INTO VIDEO, AND VIDEO AUTHENTICATION METHOD AND SYSTEM|
A method and system for writing secret information into a video, and video authentication method and system. The method comprises: employing a video frame as a plane, constructing a curve function for the plane, and sequentially selecting, according to the curve function, pixel points from each frame of the video; acquiring sequences of the R value, the G value, and the B value of the ordered pixel points, and adjusting the R, G, or B value of some of the pixel points in the sequences, such that the parity of the inversion number of each sequence respectively corresponds to secret information to be written, thereby embedding the secret information. In the present invention, only a small number of pixels are extracted from each image in a video, and sequences of three color channels of these pixels can respectively represent three bit values with the parity of the inversion number thereof, thus causing minimal damage to video images. At the same time, each bit of secret information is represented by the inversion number of a sequence of values of a certain color channel of pixels extracted from an image, thus enabling the secret information to be better concealed, and providing superior fragility.