Paper Info
Title
7.5 A 250fps 124dB Dynamic-Range SPAD Image Sensor Stacked with Pixel-Parallel Photon Counter Employing Sub-Frame Extrapolating Architecture for Motion Artifact Suppression
Abstract
Photon-count imaging has been proposed as a promising technology to realize image capture with noiseless readout and high dynamic range (HDR) [1]-[7]. In addition, for industrial and scientific applications, a global shutter exposure with motion artifact suppression is essential. A single-photon avalanche diode (SPAD) image sensor is well matched to the photon-counting architecture by shrinking the SPAD pixel size and stacking a logic chip with pixel-parallel Cu-Cu connections. A pixel-parallel photon counter, however, requires many counter bits in a pixel for HDR operation. This makes it difficult to shrink the pixel size and lower the power consumption, owing to the substantial number of SPAD activations under high light conditions [2]. Inter-frame mode switching between digital photon count and analog accumulation avoids the power increase under high light conditions, but it suffers from a dip in the signal-to-noise ratio (SNR) and/or motion artifact in reproducing an HDR image [3], [4]. An approach reducing SPAD activations under high light conditions can reduce the power consumption [5]-[7], but the combination of long- and short-exposure frames for HDR [5], [6] still suffers from the dip in SNR like conventional multi-exposure image sensors [8], even if these techniques can suppress motion artifacts owing to sub-frame readout.
Year
DOI
Venue
2021
10.1109/ISSCC42613.2021.9365977
2021 IEEE International Solid- State Circuits Conference (ISSCC)
Keywords
DocType
Volume
motion artifact suppression,single-photon avalanche diode image sensor,photon-counting architecture,SPAD pixel size,SPAD activations,high light conditions,digital photon count,analog accumulation,HDR image,photon-count imaging,image capture,high dynamic range,pixel-parallel photon counter,subframe extrapolating architecture,dynamic-range SPAD image sensor,multiexposure image sensors,pixel-parallel Cu-Cu connections,noiseless readout,global shutter exposure,logic chip,interframe mode switching,signal-to-noise ratio,power consumption reduction
Conference
64
ISSN
ISBN
Citations 
0193-6530
978-1-7281-9550-6
0
PageRank 
References 
Authors
0.34
0
11
Name
Order
Citations
PageRank
Jun Ogi101.01
Takafumi Takatsuka200.68
Kazuki Hizu300.68
Yutaka Inaoka400.34
Hongbo Zhu536785.53
Yasuhisa Tochigi601.01
Yoshiaki Tashiro701.01
Fumiaki Sano801.01
Yusuke Murakawa900.68
Makoto Nakamura10204.08
yusuke oike1111.39