Spectral sensitivity optimization of color image sensors considering photon shot noise: four-channel sensor models

18 January 2010 Spectral sensitivity optimization of color image sensors considering photon shot noise: four-channel sensor models

Hideyasu Kuniba

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Proceedings Volume 7537, Digital Photography VI; 753707 (2010) https://doi.org/10.1117/12.838808
Event: IS&T/SPIE Electronic Imaging, 2010, San Jose, California, United States

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.

Citation Download Citation

Hideyasu Kuniba "Spectral sensitivity optimization of color image sensors considering photon shot noise: four-channel sensor models", Proc. SPIE 7537, Digital Photography VI, 753707 (18 January 2010); https://doi.org/10.1117/12.838808

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