Variation of NETD caused by nonuniformity correction in thermal imager

Shi-Chen Chao; Hau-Ming Huang

doi:10.1117/12.319381

26 August 1998 Variation of NETD caused by nonuniformity correction in thermal imager

Shi-Chen Chao, Hau-Ming Huang

Proceedings Volume 3377, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IX; (1998) https://doi.org/10.1117/12.319381
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

Abstract

The background irradiances in different temperatures are calculated to find its relation with the measured NETD (Noise Equivalent Temperature Difference). In the nonuniformity correction, it always uses the active pixels to cover the dead pixels so that the final value of NETD is an average. Some experimental results show that the video waveform of thermal imaging depends on the setting of the level or the gain. These factors always influence the measured data of NETD. Nevertheless, NETD is a good diagnostic tool for determining the quality of the thermal imager. A NETD analysis for 1-point and 2-point correction is attached at the end of this article.

Citation Download Citation

Shi-Chen Chao and Hau-Ming Huang "Variation of NETD caused by nonuniformity correction in thermal imager", Proc. SPIE 3377, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IX, (26 August 1998); https://doi.org/10.1117/12.319381

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