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Proceedings Paper

Spectral sensitivity optimization of color image sensors considering photon shot noise: four-channel sensor models
Author(s): Hideyasu Kuniba
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Paper Abstract

Four channel sensors were evaluated with a image sensor model and their performance was compared with three channel sensors considering both color reproduction accuracy and photo shot noise. When noise was not considered, a sensor with usual RGB plus an additional channel which resided between G and B was the best. But when the emphasis was on noise, a sensor with B, R and two Gs was the best because reducing noise of G should be effective in reducing noise of all L*a*b* components. Bayer color filter array (CFA) samples twice density of G than R or B. This CFA is considered to be efficient in resolution but the result suggests it is also efficient in SNR. Comparing to three channel sensors, the four channel sensors were better in color reproduction but worse in noise. An image preference model proposed by Kuniba and Berns was used to evaluate them and it was shown that neither one was superior than the other.

Paper Details

Date Published: 18 January 2010
PDF: 8 pages
Proc. SPIE 7537, Digital Photography VI, 753707 (18 January 2010); doi: 10.1117/12.838808
Show Author Affiliations
Hideyasu Kuniba, Nikon Corp. (Japan)

Published in SPIE Proceedings Vol. 7537:
Digital Photography VI
Francisco Imai; Nitin Sampat; Feng Xiao, Editor(s)

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