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Proceedings Paper

From spectral sensitivities to noise characteristics
Author(s): Jérôme Buzzi; Frédéric Guichard; Hervé Hornung
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Paper Abstract

For a given noise at the photosite level and a given output color space, the spectral sensitivities of a sensor constrain the color processing and therefore impact the level of noise in the output. In particular, this noise may be very different from the usually documented photosite noise. A key phenomenon is the appearance of strong correlations between channels which makes individual channel measures (including the classical signal-to-noise ratio, SNR) misleading. We evaluate existing chains and isolated sensors by several indicators including the previously developed color sensitivity. We finally apply this approach to the understanding of good spectral sensitivities by considering hypothetical spectral sensitivities and simulating their performances.

Paper Details

Date Published: 20 February 2007
PDF: 11 pages
Proc. SPIE 6502, Digital Photography III, 650209 (20 February 2007); doi: 10.1117/12.703961
Show Author Affiliations
Jérôme Buzzi, CNRS (France)
École Polytechnique, CMLS (France)
Frédéric Guichard, DxO Labs. (France)
Hervé Hornung, DxO Labs. (France)

Published in SPIE Proceedings Vol. 6502:
Digital Photography III
Russel A. Martin; Jeffrey M. DiCarlo; Nitin Sampat, Editor(s)

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