A White-RGB CFA-Patterned CMOS Image Sensor with Wide Dynamic Range

A White-RGB CFA-Patterned CMOS Image Sensor with Wide Dynamic Range

CMOS image sensors is important for mobile phone cameras. But, when very small pixel sizes are used, the sensor SNR is limited by photon shot noise. In order to improve the sensor SNR Honda and Luo proposed the use of a sensor with a white (W) pixel in the color filter area. The white pixel, however...

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Bibliographische Detailangaben
Hauptverfasser: Egawa, Yoshitaka, Tanaka, Nagataka, Kawai, Nobuhiro, Seki, Hiromichi, Nakao, Akira, Honda, Hiroto, Iida, Yoshinori, Monoi, Makoto
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Cameras
CMOS image sensors
CMOS technology
Color
Colored noise
Computational Intelligence Society
Dynamic range
Filters
Image sensors
Sensor arrays
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Beschreibung
Zusammenfassung:CMOS image sensors is important for mobile phone cameras. But, when very small pixel sizes are used, the sensor SNR is limited by photon shot noise. In order to improve the sensor SNR Honda and Luo proposed the use of a sensor with a white (W) pixel in the color filter area. The white pixel, however, saturates at low light levels and sufficient dynamic range cannot be obtained as a result. In order to overcome the dynamic range problem, we propose a CIS with a WRGB color filter array (two white pixels per 2x2 block) incorporating the wide dynamic-range (WDR) technology.
ISSN:0193-6530
2376-8606
DOI:10.1109/ISSCC.2008.4523052