Assessing the Performance of a Low-Cost Thermal Camera in Proximal and Aerial Conditions
Assessing the Performance of a Low-Cost Thermal Camera in Proximal and Aerial Conditions
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DOI：
10.3390/rs12213591
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发表时间：
2020-11-01
期刊：
影响因子：
5
通讯作者：
Martello, Mauricio
中科院分区：
文献类型：
--
作者：
Acorsi, Matheus Gabriel;Gimenez, Leandro Maria;Martello, Mauricio
低成本小型化热像仪的发展扩大了遥感地表温度的使用，并促进了近地和空中数据采集应用的进展。然而，由于传感器的灵敏度会根据内部温度变化，因此从这些相机中获得准确的温度读数通常具有挑战性。此外，从航空图像中产生正立体图所需的摄影测量处理也可能存在问题，并给温度读数带来误差。在这项研究中，我们基于参考温度测量得出的精度和精度指标，评估了FLIR Lepton 3.5相机在近地和空中条件下的性能。空中分析使用沿天复制的三个飞行高度进行，探索相机和目标之间距离的影响，以及用于创建正立体图的混合模式配置。在测试过程中，相机能够在制造商使用工厂校准时报告的精度范围内提供结果，近端条件下的均方根误差（RMSE）为1.08℃
The development of low-cost miniaturized thermal cameras has expanded the use of remotely sensed surface temperature and promoted advances in applications involving proximal and aerial data acquisition. However, deriving accurate temperature readings from these cameras is often challenging due to the sensitivity of the sensor, which changes according to the internal temperature. Moreover, the photogrammetry processing required to produce orthomosaics from aerial images can also be problematic and introduce errors to the temperature readings. In this study, we assessed the performance of the FLIR Lepton 3.5 camera in both proximal and aerial conditions based on precision and accuracy indices derived from reference temperature measurements. The aerial analysis was conducted using three flight altitudes replicated along the day, exploring the effect of the distance between the camera and the target, and the blending mode configuration used to create orthomosaics. During the tests, the camera was able to deliver results within the accuracy reported by the manufacturer when using factory calibration, with a root mean square error (RMSE) of 1.08 degrees C for proximal condition and