Table 2. Outline of various studies on pig body temperature measurements using infrared thermography (IRT) imaging

No.	Camera	Application	Measuring part	Performance	References
1	Flir T650sc Fluke TiS45	Temperature monitoring	Ear canal, eye canthus, outer ear, perianal area	R2 = 0.49–0.54 Error = ±0.2°C, ±0.3°C	Stukelj et al. [46]
2	Rotatable infrared filter	Temperature screening	Body surface	Error = ±0.3°C	Jiao and Jiao [47]
3	FLIR SC620	Infrared emissivity	Body, trotter, and eye	R2 = 0.89–0.93 R2 = 0.94–0.97	Zhang et al. [48]
4	Hikvision TB-1217A-3’PA	Body surface	Skin temperature	Error = 4.63%	Wang et al. [50]
5	Allflex PNL4060 RFID	Temperature screening	Dorsal surface	Error = −0.28°C to −0.48°C	Cook et al. [49]
6	ThermaCAM E2 FLIR	Temperature monitoring	Auricle, ear canal, frontoparietal, infraorbital, axillar, dorsum, abdomen, anus regions	R2 = 0.19–0.34 MSE= 0.12–0.17	Chung et al. [51]