University of Oulu

Ruokamo, H., Hallman, L., & Kostamovaara, J. (2019). A range-gated CMOS SPAD array for real-time 3D range imaging. Electronic Imaging, 2019(9), 357-1-357–5.

A range-gated CMOS SPAD array for real-time 3D range imaging

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Author: Ruokamo, Henna1; Hallman, Lauri1; Kostamovaara, Juha1
Organizations: 1Faculty of Information Technology and Electrical Engineering, Circuits and Systems Research Unit, University of Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.6 MB)
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Language: English
Published: Society for Imaging Science & Technology, 2019
Publish Date: 2020-11-05


A range image of a scene is produced with a solid-state time of- flight system that uses active illumination and a time-gated single photon avalanche diode (SPAD) array. The distance to a target from the imager is measured by delaying the time gate in small steps and counting the photons of the pixels in each delay step in successive measurements. To achieve a high frame rate, the number of delay steps needed is minimized by limiting the scanning of the depth only to the range of interest. To be able to measure scenes with objects in different ranges, the array has been divided into groups of pixels with independently controlled time gating. This paper demonstrates an algorithm that can be used to control the time gating of the pixel groups in the sensor array to achieve depth maps of the scene with the time-gated SPAD array in real time and at a 70 Hz frame rate.

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Series: IS&T International Symposium on Electronic Imaging
ISSN: 2470-1173
ISSN-E: 2470-1173
ISSN-L: 2470-1173
Pages: 357-1 - 357-5(5)
DOI: 10.2352/ISSN.2470-1173.2019.9.IMSE-357
Host publication: Proceedings of the IS&T 2019 International Symposium on Electronic Imaging (EI): Image Sensors and Imaging Systems, 2019, 13-17 Janyuary 2019, Burlingame, USA
Host publication editor: Darmont, Arnaud
Peizerat, Arnaud
Widenhorn, Ralf
Conference: IS&T International Symposium on Electronic Imaging
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Copyright information: © 2019, Society for Imaging Science and Technology.