Hyperspectral calibration method For CMOS-based hyperspectral sensors

Julien Pichette; Thomas Goossens; Kathleen Vunckx; Andy Lambrechts

doi:10.1117/12.2253617

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20 February 2017 Hyperspectral calibration method For CMOS-based hyperspectral sensors

Julien Pichette, Thomas Goossens, Kathleen Vunckx, Andy Lambrechts

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Proceedings Volume 10110, Photonic Instrumentation Engineering IV; 101100H (2017) https://doi.org/10.1117/12.2253617
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Imec has developed a process for the monolithic integration of optical filters on top of CMOS image sensors, leading to compact, cost-efficient and faster hyperspectral cameras that make the technology attractive for industry. To calibrate the sensor, we introduce a full pixel response model that takes into account the inherent properties of the optical filters. This model is then used to derive a calibration method that enables more accurate and robust measurements of the spectral reflectance of a scene. The calibration method is then extended to take into account the normal manufacturing variations between different sensors to perform an inter-sensor calibration. We experimentally validate this method by scanning reference targets with different types of sensors and demonstrate that accurate and reproducible reflectance measurements are obtained.

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Julien Pichette, Thomas Goossens, Kathleen Vunckx, and Andy Lambrechts "Hyperspectral calibration method For CMOS-based hyperspectral sensors", Proc. SPIE 10110, Photonic Instrumentation Engineering IV, 101100H (20 February 2017); https://doi.org/10.1117/12.2253617

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