TY - JOUR
T1 - Radiometric Calibration of Digital Counts of Infrared Thermal Cameras
AU - Gonzalez-Chavez, Othon
AU - Cardenas-Garcia, Daniel
AU - Karaman, Sertac
AU - Lizarraga, Mariano
AU - Salas, Joaquin
N1 - Publisher Copyright:
© 1963-2012 IEEE.
PY - 2019/11
Y1 - 2019/11
N2 - Infrared thermal cameras have applications in a range of fields including security, agriculture, inspection, and health. In this paper, we are interested in their sensing properties, where we model and estimate the camera parameters required to transform digital counts to temperature values. Specifically, we propose a method to characterize the spatial deviation for the irradiance observed at the image plane for an uncooled focal-plane array camera deprived of an internal measurement of temperature. In our approach, we establish the relationship between the radiance emitted by a temperature varying blackbody chamber and the uncooled camera digital output. The model approximates this relationship as a quadratic polynomial whose variations are themselves approximated with another polynomial expression. Our results suggest a significant improvement over the commonly used Plancklike expression.
AB - Infrared thermal cameras have applications in a range of fields including security, agriculture, inspection, and health. In this paper, we are interested in their sensing properties, where we model and estimate the camera parameters required to transform digital counts to temperature values. Specifically, we propose a method to characterize the spatial deviation for the irradiance observed at the image plane for an uncooled focal-plane array camera deprived of an internal measurement of temperature. In our approach, we establish the relationship between the radiance emitted by a temperature varying blackbody chamber and the uncooled camera digital output. The model approximates this relationship as a quadratic polynomial whose variations are themselves approximated with another polynomial expression. Our results suggest a significant improvement over the commonly used Plancklike expression.
UR - http://www.scopus.com/inward/record.url?scp=85077458904&partnerID=8YFLogxK
U2 - 10.1109/TIM.2018.2887070
DO - 10.1109/TIM.2018.2887070
M3 - Artículo
AN - SCOPUS:85077458904
SN - 0018-9456
VL - 68
SP - 4387
EP - 4399
JO - IEEE Transactions on Instrumentation and Measurement
JF - IEEE Transactions on Instrumentation and Measurement
IS - 11
M1 - 8611149
ER -