1Rapid detection of camera tampering and abnormal disturbance for video surveillance system, Deng-Yuan Huang, Chao-Ho Chen, Tsong-Yi Chen , Wu-Chih Hu, Bo-Cin Chert, http://www. sciencedirect.com/science/article/pii/ S1047320314001473.
2Tampering Detection In Low- Power Smart Cameras, Adriano Gaibotti, Claudio Marchisio, Alexandro Sentinelli, Giacomo Boracchi, http://link.springer. com/chapter/10.1007/978- 3- 319-23983- 5_23#page- 1.
3Unified Camera Tamper Detection Based on Edge and Object Information, Gil-beom Lee, Myeong-jin Lee, Jongtae Lim, http://www.mdpi.com/1424- 8220/15/5/10315/htm.
4Tamper Detection for Active Surveillance Systems,Theodore Tsesmelis, Lars Christensen, Preben Fihl and Thomas B. Moeslund, Visual Analysis of People Lab, Aalborg University, Denmark.