Published In
SPIE Proceedings
Document Type
Article
Publication Date
1-1-2009
Subjects
Single-lens reflex cameras, Image processing -- Digital techniques, CCD cameras -- Calibration, Charge coupled devices
Abstract
Digital single-lens reflex (DSLR) cameras are examined and their dark current behavior is presented. We examine the influence of varying temperature, exposure time, and gain setting on dark current. Dark current behavior unique to sensors within such cameras is observed. In particular, heat is trapped within the camera body resulting in higher internal temperatures and an increase in dark current after successive images. We look at the possibility of correcting for the dark current, based on previous work done for scientific grade imagers, where hot pixels are used as indicators for the entire chip?s dark current behavior. Standard methods of dark current correction are compared to computed dark frames. Dark current is a concern for DSLR cameras as optimum conditions for limiting dark current, such as cooling the imager, are not easily obtained in the typical use of such imagers.
DOI
10.1117/12.806128
Persistent Identifier
http://archives.pdx.edu/ds/psu/9230
Citation Details
Justin C. Dunlap ; Oleg Sostin ; Ralf Widenhorn and Erik Bodegom, "Dark current behavior in DSLR cameras", Proc. SPIE 7249, Sensors, Cameras, and Systems for Industrial/Scientific Applications X, 72490N (January 27, 2009); http://dx.doi.org/10.1117/12.806128
Description
Copyright 2009 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.