Title :
A low-light SPAD vision array
Author :
Berkovich, Andrew ; Abshire, Pamela
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Maryland, College Park, MD, USA
Abstract :
We present a low-light vision system platform that enables the testing and implementation of optic flow algorithms and kernel operations for micro-air vehicle navigation and obstacle avoidance capabilities. The system includes a 7×7 array of actively-quenched large-area single photon avalanche diodes, each having a compact 9-bit analog counter, and system-level time-of-fight range measurement with simulated sub-meter resolution. The system has a frame read-out rate of 100kHz and is implemented in a commercially available 0.5μm CMOS process.
Keywords :
CMOS image sensors; SLAM (robots); autonomous aerial vehicles; avalanche photodiodes; collision avoidance; computer vision; distance measurement; image sequences; microrobots; sensor arrays; CMOS process; SPAD vision array; active quenching; analog counter; frame readout rate; frequency 100 kHz; kernel operation; microair vehicle navigation; obstacle avoidance; optical flow algorithm; single photon avalanche diode array; size 0.5 mum; submeter resolution; system level time-of-flight range measurement; vision system; Anodes; Image resolution; Industries; Navigation; Radiation detectors; Subspace constraints; Switches; CMOS sensor; SPAD; time-of-flight; vision system;
Conference_Titel :
Circuits and Systems (ISCAS), 2014 IEEE International Symposium on
Conference_Location :
Melbourne VIC
Print_ISBN :
978-1-4799-3431-7
DOI :
10.1109/ISCAS.2014.6865521
