A 4.1Mpix 280fps stacked CMOS image sensor with array-parallel ADC architecture for region control

Takahashi, Tomohiro; Kaji, Yuichi; Tsukuda, Yasunori; Futami, Shinichiro; Hanzawa, Katsurou; Yamauchi, Takahito; Wong, Ping Wah; Frederick, Brady; Holden, Phil; Ayers, Thomas; Mizuta, Kyohei; Ohki, Susumu; Tatani, Keiji; Nagano, Takashi; Wakabayashi, Hayato; Nitta, Yoshikazu

doi:10.23919/vlsic.2017.8008495

Cited by 10 publications

(5 citation statements)

References 4 publications

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“…While the approach is currently implemented in software and has iterative elements, with the predicted increase in on-chip processing [ 24 , 25 ] in image sensors (facilitated by stacking and advanced readout schemes [ 26 , 27 ]), as well as the advent of advanced applications processors [ 28 ] (with computational photography and machine learning features), an integrated circuit realization is within the realm of possibility. There is thus the potential of real-time low-light vision applications, aided perhaps by active illumination and time-gated imaging for enhanced contrast, as also explored here.…”

Section: Discussionmentioning

confidence: 99%

Single-Photon Tracking for High-Speed Vision

Gyöngy

Dutton

Henderson

2018

Sensors

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Quanta Imager Sensors provide photon detections at high frame rates, with negligible read-out noise, making them ideal for high-speed optical tracking. At the basic level of bit-planes or binary maps of photon detections, objects may present limited detail. However, through motion estimation and spatial reassignment of photon detections, the objects can be reconstructed with minimal motion artefacts. We here present the first demonstration of high-speed two-dimensional (2D) tracking and reconstruction of rigid, planar objects with a Quanta Image Sensor, including a demonstration of depth-resolved tracking.

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Section: Discussionmentioning

confidence: 99%

Single-Photon Tracking for High-Speed Vision

Gyöngy

Dutton

Henderson

2018

Sensors

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“…Finally, the exposure time of each block are recorded in the exposure-time table. If in an environment where the exposure state of the subject changes, many schemes can be used to efficiently obtain the optimum HDR image, such as by sequentially updating the exposure-time table during live view execution and a method to control exposure based on motion information in addition light intensities [6].…”

Section: B Image Processing 1) Auto Exposure (Ae) Controlmentioning

confidence: 99%

“…where α is the multiplication of the exposure time normalized by 1 ms to a power of 2 and N is the TV number. The acquired image is reconstructed by multiplying the gain according to the TV number, but since both the signal and noise are multiplied by the gain, the SNR can be expressed in the same as in (6). The graph of "Best SNR" shows the best case using the highest SNR condition.…”

Section: ) Snr With Single-frame Cementioning

confidence: 99%

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A Vision System With 1-inch 17-Mpixel 1000-fps Block-Controlled Coded-Exposure Stacked-CMOS Image Sensor for Computational Imaging and Adaptive Dynamic Range Control

Hirata

Murata

Arii

et al. 2022

IEEE Open J. Circuits Syst.

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This study introduces a vision system that can acquire images at high speeds and high resolutions. Image sensors are used not only in digital still cameras but also in various applications that require capturing wide luminance differences beyond human perception. For example, fast, high-resolution object recognition, and motion tracking in automatic driving systems are essential, particularly in dark tunnels or the mid-summer sunshine. However, the resolution, frame rate, pixel size, and dynamic range should be traded off to achieve a high performance in capturing moving objects with a high contrast. We have developed a high-speed vision system with a readout operation of 1000 fps, resolution of 4K × 4K, dynamic range of 110 dB, and fine pixels of 2.7 μm. These characteristics were achieved using several technologies such as 1) coded exposure (CE), which divides the image plane into smaller blocks and controls the exposure time of each block individually, 2) arrangement of analog-to-digital converters in parallel for each block, and 3) three-dimensional wafer stacking, which enables high-density integration of circuits and pixels. The proposed system can be applied in CE-based computational imaging in addition to high-dynamic-range applications for handling both the dark and bright areas in a scene.INDEX TERMS Block parallel, coded exposure (CE), high dynamic range (HDR), high-speed imaging, stacked CMOS image sensor (CIS), vision system.

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“…In conventional methods or the method described in Sect. 2.3.1, a feedback amplifier is allocated to each column or each area 2,3,19) to suppress the reset noise and threshold voltage variation. However, a sensor with a large number of pixels requires a long suppression time owing to the large time constant of the vertical signal line.…”

Section: In-pixel Capacitive-coupled Noise Cancellermentioning

confidence: 99%

Advanced features of layered-structure organic-photoconductive-film CMOS image sensor: Over 120 dB wide dynamic range function and photoelectric-conversion-controlled global shutter function

Nishimura

Shishido

Miyake

et al. 2018

Jpn. J. Appl. Phys.

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We have developed organic photoconductive film (OPF) CMOS image sensors with pixel structures different from those of a conventional silicon image sensors, in which, the organic thin film for photoelectric conversion and the charge storage part for signal charge accumulation are completely independent. In this paper, we focus on two unique features of the OPF image sensor: (1) technology that realizes over 120 dB simultaneous-capture wide dynamic range, (2) global shutter technology achieving high saturation signals per unit square that is 10 dB higher than that of silicon image sensors with the global shutter function, without sacrificing pixel area. In addition, we have developed a test chip that realizes a high resolution of 8K4K, a high frame rate of 60 fps, a high saturation signals of 450 ke−, and the global shutter function simultaneously. These features of the OPF image sensor will contribute to significant progress in imaging and sensing fields.

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A 4.1Mpix 280fps stacked CMOS image sensor with array-parallel ADC architecture for region control

Cited by 10 publications

References 4 publications

Single-Photon Tracking for High-Speed Vision

Single-Photon Tracking for High-Speed Vision

A Vision System With 1-inch 17-Mpixel 1000-fps Block-Controlled Coded-Exposure Stacked-CMOS Image Sensor for Computational Imaging and Adaptive Dynamic Range Control

Advanced features of layered-structure organic-photoconductive-film CMOS image sensor: Over 120 dB wide dynamic range function and photoelectric-conversion-controlled global shutter function

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