WORKSHOP PAPER
High Performance CMOS Logarithmic Sensor with Continuous Adaptive FPN Correction
Yang NI1
1Spectrum in Motion France, 7 Rue de la Croix Martre, 91120 Palaiseau

Abstract

This paper presents a CMOS logarithmic sensor based on specially designed 4T charge mode Lin-Log pixel, readout and associated signal processing. Each pixel generates 2 different parameterized captures. These capture parameters can be either exposure time or FWC of the pinned photodiode. A unified precise logarithmic response is generated from these captures by simple pixel-wise image processing. This processing can be implemented as background continuous adaptation process which can overcome the environment dependence of pixels. A prototype sensor based on exposure time mixture has been designed and fabricated in a standard CMOS process. The associated image processing has been implemented on PC. The firsthand results demonstrate a high sensitivity, native instant ultra-wide dynamic range and low FPN.
Year: 2025
Workshop: IISW
URL: https://doi.org/10.60928/7vdy-5sxz
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Keywords

CMOS, logarithmic sensor, FPN correction, image processing, exposure time, FWC, logarithmic response,

References

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