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Journal of Electronic Imaging

Correction of dark current in consumer cameras
Author(s): Justin C. Dunlap; Erik Bodegom; Ralf Widenhorn
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Paper 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.

Paper Details

Date Published: 1 January 2010
PDF: 11 pages
J. Electron. Imaging. 19(1) 013010 doi: 10.1117/1.3358365
Published in: Journal of Electronic Imaging Volume 19, Issue 1
Show Author Affiliations
Justin C. Dunlap, Portland State Univ. (United States)
Erik Bodegom, Portland State Univ. (United States)
Ralf Widenhorn, Portland State Univ. (United States)

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