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首页> 外文期刊>Animal Production Science >Image-processing technique to measure pig activity in response to climatic variation in a pig barn
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Image-processing technique to measure pig activity in response to climatic variation in a pig barn

机译：图像处理技术测量猪场响应气候变化的猪场活动

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In the past decades, the increasing scale of intensive pig farms led farmers to use automatic tools to monitor the welfare and health of their animals. Visual observation and manual monitoring, usually practiced in small-scale farms, is unreliable in large-scale husbandry, and is expensive and time consuming. Environmental parameters are crucial information for the efficient management of piggery buildings, as they have a significant effect on production efficiency, health and welfare of confined animals. The aim of the present study was to evaluate the relationship between pig activity and environmental parameters in a pig building by means of image analysis. The barn for 350 fattening pigs was open-space, mechanically ventilated and subdivided into 16 pens with fully slatted floor. The room was equipped to monitor the ventilation rate, internal and external temperature and relative humidity every minute. For the experiments, two adjacent pens were selected, each 5.9 by 2.6 m, with similar to 16 pigs in each. Pigs were continuously monitored during 30 days using an infrared-sensitive CCD camera that was mounted 5 m above the floor. Recorded data were processed in real time by Eyenamic, an innovative software that continuously and automatically registers the behaviour of a group of animals, intended as the activity and occupation indices of the pigs. A preliminary virtual subdivision of the two pens in four zones (two zones for each pen) was performed to evaluate differences in activity/occupation indices in 'front' and 'back' zones of the pen. Recorded images were visually observed in the laboratory to estimate pig activity type in relation to the indices calculated by Eyenamic software. The occupation index showed higher values (up to 0.75 units) in Zones 1 and 4 placed near the corridor. There was a significant relation between pig occupation index measured in the two pens and ventilation rate, temperature and humidity. The interaction between ventilation and humidity and temperature and humidity significantly affected pig movements during the day. Pigs tended to stay in the part of the pen far from the external wall, where air velocity was higher, probably because this is a 'central zone' in the barn, characterised by a reasonable air movement (similar to 0.30 m/s). On the contrary, the part of the pen nearest to the external wall, characterised by a humid floor surface and by a limited air speed, was occupied by animals at the trough mainly during feeding times and for defecation and urination.
机译：在过去的几十年中，集约化养猪场的规模不断扩大，导致农民使用自动工具监控动物的福利和健康。通常在小规模农场中进行的视觉观察和手动监控在大规模饲养中不可靠，并且昂贵且耗时。环境参数是有效管理养猪场的关键信息，因为它们对受限动物的生产效率，健康和福利具有重大影响。本研究的目的是通过图像分析来评估猪的活动与猪舍环境参数之间的关系。用于饲养350头肥育猪的猪舍是开放空间的，采用机械通风并细分为16条完全铺板的围栏。房间配备了每分钟监测通风率，内部和外部温度以及相对湿度的设备。为了进行实验，选择了两个相邻的围栏，每个围栏为5.9 x 2.6 m，每个围栏与16头猪相似。在30天内使用安装在地面上方5 m的红外敏感CCD摄像机连续监测猪。记录的数据由Eyenamic实时处理，Eyenamic是一款创新软件，可以连续自动记录一组动物的行为，以作为猪的活动和职业指数。对这四个笔在四个区域（每个笔的两个区域）进行了初步的虚拟细分，以评估笔的“前”和“后”区域中活动/占用指数的差异。在实验室中用肉眼观察记录的图像，以估计与Eyenamic软件计算的指标有关的猪活动类型。在走廊附近的1区和4区，占领指数显示出较高的值（最多0.75个单位）。用两支钢笔测得的猪的职业指数与通风速率，温度和湿度之间存在显着的关系。通风和湿度以及温度和湿度之间的相互作用会显着影响白天的猪的运动。猪倾向于停留在远离空气流速较高的外壁的那部分围栏中，这可能是因为这是谷仓中的“中心区域”，具有合理的空气运动（类似于0.30 m / s）。相反，钢笔最靠近外壁的部分（其特征是潮湿的地板表面和有限的空气速度）主要在进食期间以及排便和排尿时被动物在槽中占据。

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