Sensitomeric response of DCS class professional digital cameras

Barry D. Bullard

doi:10.1117/12.304587

1 April 1998 Sensitomeric response of DCS-class professional digital cameras

Barry D. Bullard

Proceedings Volume 3302, Digital Solid State Cameras: Designs and Applications; (1998) https://doi.org/10.1117/12.304587
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

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.

Citation Download Citation

Barry D. Bullard "Sensitomeric response of DCS-class professional digital cameras", Proc. SPIE 3302, Digital Solid State Cameras: Designs and Applications, (1 April 1998); https://doi.org/10.1117/12.304587

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