Title | ||
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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 | ||
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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 |
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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 Ogi | 1 | 0 | 1.01 |
Takafumi Takatsuka | 2 | 0 | 0.68 |
Kazuki Hizu | 3 | 0 | 0.68 |
Yutaka Inaoka | 4 | 0 | 0.34 |
Hongbo Zhu | 5 | 367 | 85.53 |
Yasuhisa Tochigi | 6 | 0 | 1.01 |
Yoshiaki Tashiro | 7 | 0 | 1.01 |
Fumiaki Sano | 8 | 0 | 1.01 |
Yusuke Murakawa | 9 | 0 | 0.68 |
Makoto Nakamura | 10 | 20 | 4.08 |
yusuke oike | 11 | 1 | 1.39 |