[1] [1] Xu Jianyu, Cui Shaorong, Miao Xiangwen, et al.. Application and prospect of computer vision technology in aquaculture [J]. Transactions of the CSAE, 2005, 21(8): 174-178.

[2] [2] Ma Li, Ji Bin, Liu Hongshen, et al.. Differentiating profile based on single pig contour［J］. Transactions of the Chinese Society of Agricultural Engineering, 2013, 29(10): 168-174.

[3] [3] Liu Bo, Zhu Weixing, Yang Jianjun, et al.. Extracting of pig gait frequency feature based on depth image and pig skeleton endpoints analysis［J］. Transactions of the Chinese Society of Agricultural Engineering, 2014,30(10): 131-137.

[4] [4] Liu Tonghai, Teng Guanghui, Fu Weisen, et al.. Extraction algorithms and applications of pig body size measurement points based on computer vision［J］. Transactions of the Chinese Society of Agricultural Engineering, 2013, 29(2): 161-168.

[5] [5] Shao B, Xin H. A real-time computer vision assessment and control of thermal comfort for group-housed pigs［J］. Computers and Electronics in Agriculture, 2008, 62(1): 15-21.

[6] [6] Costa A, Borgonovo F, Leroy T, et al.. Dust concentration variation in relation to animal activity in a pig barn［J］. Biosystems Engineering, 2009, 104(1): 118-124.

[7] [7] Beattie V E, Walker N, Sneddon I A. Effects of environmental enrichment on behaviour and productivity of growing pigs［J］. Animal Welfare, 1995, 4(3): 207-220.

[8] [8] Cui Weiguo. Behavioral problems of environmental design in piggery［J］, Animal Husbandry and Veterinary Medicine, 2000(zl), 77-81.

[9] [9] Wang Kaiying. Influence of temperature and humidity about rearing pigs physiology and production targets in piggerys［J］. Transactions of the Chinese Society of Agricultural Engineering, 2002,18(1):99-102.

[10] [10] Li Zhengbo. Automatic Behavior Analysis System of Pigs Bases on Computer Vision: China, 201410191838.3［P］. 2014-05-08.

[11] [11] Qiu Zhengjun. A System for Pig Identification Marks in Piggery Bases on Machine Vision：China, CN201310606328.3［P］.2013-11-25.

[12] [12] Cheng Y. Mean shift, mode seeking, and clustering［J］. Pattern Analysis and Machine Intelligence, IEEE Transactions on, 1995, 17(8): 790-799.

[13] [13] Yang Jie, Zhang Xiang. Video Object Detection and Tracking and its Application［M］. Shanghai: Profile of Shanghai Jiao Tong University Press,2012.

[14] [14] Liang Min, Liu Guixi. Multi-object tracking algorithm based on adaptive mixed filtering［J］. Acta Optica Sinica, 2010, 30(9): 2554-2561.

[15] [15] Zhang Xuguang, Zhang Yun, Wang Yanning, et al.. Covariance tracking based on forgetting factor and kalman filter［J］. Acta Optica Sinica, 2010, 30(8): 2317-2323.

[16] [16] Wang Zebing, Yang Wei, Qing Li. Target tracking based on particle swarm optimization using dynamic pyroelectric infrared sensor［J］. Acta Optica Sinica, 2014, 34(10): 1004001.

[17] [17] Gupte S, Masoud O, Martin R F K, et al.. Detection and classification of vehicles［J］. Intelligent Transportation Systems, IEEE Transactions on, 2002, 3(1): 37-47.

[18] [18] McFarlane N J B, Schofield C P. Segmentation and tracking of piglets in images［J］. Machine Vision and Applications, 1995, 8(3): 187-193.

[19] [19] Lind N M, Vinther M, Hemmingsen R P, et al.. Validation of a digital video tracking system for recording pig locomotor behaviour［J］. Journal of Neuroscience Methods, 2005, 143(2): 123-132.

[20] [20] Zhou Yongjun, Yu Shouhua, Qu Jingying. Pig intelligent tracking based on multi-feature Camshift algorithm combined with Kalman filter［J］. Guangdong Agricultural Sciences, 2013, 40(9): 174-177.

[21] [21] Meier T, Ngan K N. Video segmentation for content-based coding［J］. Circuits and Systems for Video Technology, IEEE Transactions on, 1999, 9(8): 1190-1203.

[22] [22] Fan Liangzhong, Liu Ying, Yu Xinjie, et al.. Fish motion detecting algorithms based on computer vision technologies［J］.Transactions of the CSAE, 2011, 27(7): 226-230.

[23] [23] Cucchiara R, Grana C, Piccardi M, et al.. Detecting moving objects, ghosts, and shadows in video streams［J］. Pattern Analysis and Machine Intelligence, IEEE Transactions on, 2003, 25(10): 1337-1342.

[24] [24] Yan Gang, Cui Guodong, Yu Ming. Player detection algorithm based on gaussian mixture models background modeling［J］. Computer Simulation, 2010 (9):258-262.

[25] [25] Jacques J C S, Jung C R, Raupp Musse S. Background subtraction and shadow detection in grayscale video sequences［C］.Computer Graphics and Image Processing, 18th Brazilian Symposium on. IEEE, 2005: 189-196.