Radiometric calibration of wide-field camera system with an application in astronomy

Stanislav Vítek; Maria Nasyrova; Veronika Stehlíková

doi:10.1117/12.2274719

19 September 2017 Radiometric calibration of wide-field camera system with an application in astronomy

Stanislav Vítek, Maria Nasyrova, Veronika Stehlíková

Proceedings Volume 10396, Applications of Digital Image Processing XL; 1039634 (2017) https://doi.org/10.1117/12.2274719
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

Camera response function (CRF) is widely used for the description of the relationship between scene radiance and image brightness. Most common application of CRF is High Dynamic Range (HDR) reconstruction of the radiance maps of imaged scenes from a set of frames with different exposures. The main goal of this work is to provide an overview of CRF estimation algorithms and compare their outputs with results obtained under laboratory conditions. These algorithms, typically designed for multimedia content, are unfortunately quite useless with astronomical image data, mostly due to their nature (blur, noise, and long exposures). Therefore, we propose an optimization of selected methods to use in an astronomical imaging application. Results are experimentally verified on the wide-field camera system using Digital Single Lens Reflex (DSLR) camera.

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Stanislav Vítek, Maria Nasyrova, and Veronika Stehlíková "Radiometric calibration of wide-field camera system with an application in astronomy", Proc. SPIE 10396, Applications of Digital Image Processing XL, 1039634 (19 September 2017); https://doi.org/10.1117/12.2274719

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KEYWORDS

Cameras

High dynamic range imaging

Imaging systems

Astronomy

Calibration

Image processing

Sensors

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