Correction of dark current in consumer cameras

Justin C. Dunlap; Erik Bodegom; Ralf Widenhorn

doi:10.1117/1.3358365

1 January 2010 Correction of dark current in consumer cameras

Justin C. Dunlap, Erik Bodegom, Ralf Widenhorn

Author Affiliations +

Journal of Electronic Imaging, Vol. 19, Issue 1, 013010 (January 2010). https://doi.org/10.1117/1.3358365

Abstract

A study of dark current in digital imagers in digital single-lens reflex (DSLR) and compact consumer-grade digital cameras is presented. Dark current is shown to vary with temperature, exposure time, and ISO setting. Further, dark current is shown to increase in successive images during a series of images. DSLR and compact consumer cameras are often designed such that they are contained within a densely packed camera body, and therefore the digital imagers within the camera frame are prone to heat generated by the sensor as well as nearby elements within the camera body. It is the scope of this work to characterize the dark current in such cameras and to show that the dark current, in part due to heat generated by the camera itself, can be corrected by using hot pixels on the imager. This method generates computed dark frames based on the dark current indicator value of the hottest pixels on the chip. We compare this method to standard methods of dark current correction.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Justin C. Dunlap, Erik Bodegom, and Ralf Widenhorn "Correction of dark current in consumer cameras," Journal of Electronic Imaging 19(1), 013010 (1 January 2010). https://doi.org/10.1117/1.3358365

Published: 1 January 2010

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