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Proceedings Paper

Sensitomeric response of DCS class professional digital cameras
Author(s): Barry D. Bullard
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Paper Abstract

The sensitometric dynamic range of a silicon-based CCD imager is generally based on the ratio of the array element's well capacity to store electrons and the readout noise level of the imager. The readout noise level is analogous with the base+fog level of film, and exceeding the capacity of a pixel's well generates excess electrons resulting in overexposure of the image. Therefore, CCD imaging cameras exhibit S-shaped H and D curves with range limiting toes and shoulders similar to silver halide based film and paper. It is generally accepted that to capture all the tomes of a typical subject image, the capturing imager should have a minimum dynamic range of 7 f-stops. Current professional film and paper support this 7 f-stop requirement, with some films capable of 8-9 f-stops of tonal dynamic range. This paper describes a recent research project conducted at the Institute to characterize the sensitometric response of several DCS-class professional CCD digital imaging cameras. Cameras tested included to Eastman Kodak DCS 420, DCS 460, and the Canon EOS-DCS 3.

Paper Details

Date Published: 1 April 1998
PDF: 8 pages
Proc. SPIE 3302, Digital Solid State Cameras: Designs and Applications, (1 April 1998); doi: 10.1117/12.304587
Show Author Affiliations
Barry D. Bullard, Indiana Univ.-Purdue Univ. Indianapolis (United States)

Published in SPIE Proceedings Vol. 3302:
Digital Solid State Cameras: Designs and Applications
George M. Williams Jr., Editor(s)

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