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1. (WO2017156760) METHOD AND SYSTEM FOR WRITING SECRET INFORMATION INTO VIDEO, AND VIDEO AUTHENTICATION METHOD AND SYSTEM

Pub. No.:    WO/2017/156760    International Application No.:    PCT/CN2016/076690
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Sat Mar 19 00:59:59 CET 2016
IPC: H04N 21/2347
H04N 21/235
H04N 21/4405
Applicants: SHENZHEN UNIVERSITY
深圳大学
Inventors: ZHANG, Yong
张勇
YU, Kunqiao
虞坤桥
ZHAO, Dongning
赵东宁
LI, Yanshan
李岩山
CHEN, Jianyong
陈剑勇
Title: METHOD AND SYSTEM FOR WRITING SECRET INFORMATION INTO VIDEO, AND VIDEO AUTHENTICATION METHOD AND SYSTEM
Abstract:
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.