Dynamic Range Extension of a SPAD Imager Using Non-Uniformity Correction Techniques



Vilella, Eva, Garcia, Jose, Alonso, Oscar and Dieguez, Angel
(2016) Dynamic Range Extension of a SPAD Imager Using Non-Uniformity Correction Techniques. IEEE SENSORS JOURNAL, 16 (9). pp. 2988-2992.

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Abstract

The extraordinary sensitivity of single-photon avalanche diodes (SPADs) makes these devices the ideal option for vision systems aimed at low-light applications. Nevertheless, there exist large dark count rate and photon detection probability non-uniformities, which reduce the dynamic range of the detector. As a result, the capability to create image contrast is severely damaged or even lost. This paper presents the implementation of a correction algorithm to compensate for the mentioned non-uniformities and thus extend the contrast of the generated images. To demonstrate its efficiency, the proposed technique is applied to real images obtained with a fabricated SPAD image sensor. An increase of more than 3 b of contrast is obtained.

Item Type: Article
Uncontrolled Keywords: Avalanche photodiodes, CMOS integrated circuits, image processing, image sensors, optical imaging, optimization methods
Depositing User: Symplectic Admin
Date Deposited: 31 May 2017 13:19
Last Modified: 16 Mar 2024 09:31
DOI: 10.1109/JSEN.2016.2522651
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3001978