Thompson Rivers University, 900 McGill Road, Kamloops, British Columbia V2C 0C8, Canada.
Thompson Rivers University, 900 McGill Road, Kamloops, British Columbia V2C 0C8, Canada.
Res Vet Sci. 2014 Feb;96(1):220-6. doi: 10.1016/j.rvsc.2013.11.006. Epub 2013 Nov 19.
Environmental factors were evaluated to determine potential limitations in using cattle eye temperatures obtained through infrared thermography (IRT) for early disease detection systems or in animal welfare research studies. The effects of the following factors on IRT eye temperatures in cattle and a fabricated surrogate "eye" were evaluated: camera to object distance, wind speed, camera settings (distance, emissivity, and humidity), and solar loading. Wind speed in both live animals and using a surrogate "eye" was found to decrease the IRT temperature. In the presence of ∼ 7 km/h wind, the mean IRT eye temperature decreased by 0.43 ± 0.13 °C and; at higher wind speeds (∼ 12 km/h), the temperature decreased by 0.78 ± 0.33 °C. Direct sunlight was found to increase the IRT eye temperature by 0.56 ± 0.36 °C. It was determined that environmental factors impact IRT temperature measurements significantly and therefore must be managed to ensure reproducible and accurate readings.
环境因素被评估，以确定使用通过红外热成像（IRT）获得的牛眼温度来进行早期疾病检测系统或动物福利研究的潜在限制。评估了以下因素对牛和人工“眼睛”的 IRT 眼温度的影响：相机到物体的距离、风速、相机设置（距离、发射率和湿度）和太阳负荷。发现风速会降低 IRT 温度，无论是在活体动物还是使用人工“眼睛”的情况下。在约 7 公里/小时的风速下，平均 IRT 眼温度下降了 0.43±0.13°C；在更高的风速（约 12 公里/小时）下，温度下降了 0.78±0.33°C。发现直接阳光会使 IRT 眼温度升高 0.56±0.36°C。确定环境因素会显著影响 IRT 温度测量，因此必须加以管理，以确保可重复和准确的读数。
