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We present passive absorption-based ranging using long-wave infrared hyperspectral measurements of an outdoor scene. Regularization and parametric modeling of transmittance enable good accuracy without knowing temperatures or emissivities of scene objects, as validated with lidar.
Dorken Gallastegi, U.
, Rueda-Chacon, H.
, Stevens, M.
and Goyal, V.
(2022),
Absorption-Based Ranging from Ambient Thermal Radiation without Known Emissivities, OSA Technical Digest, San Jose, CA, US, [online], https://doi.org/10.1364/CLEO_SI.2022.STh5J.3, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933890
(Accessed October 8, 2025)