A Wide-Dynamic-Range CMOS Image Sensor With Gating for Night Vision Systems

Recent technology advances in CMOS image sensors (CIS) enable their utilization in the most demanding of surveillance fields, especially visual surveillance and intrusion detection in intelligent surveillance systems, aerial surveillance in war zones, Earth environmental surveillance by satellites in space monitoring, agricultural monitoring using wireless sensor networks and internet of things and driver assistance in automotive fields. This paper presents an overview of CMOS image sensor-based surveillance applications over the last decade by tabulating the design characteristics related to image quality such as resolution, frame rate, dynamic range, signal-to-noise ratio, and also processing technology. Different models of CMOS image sensors used in all applications have been surveyed and tabulated for every year and application.

show abstract

“…Spivak et al [ 66 ] developed a CIS for night vision systems. Its black box approach in shown in Figure 51 .…”

Section: Cmos Image Sensor Applicationsmentioning

confidence: 99%

CMOS Image Sensors in Surveillance System Applications

Sukhavasi

Elleithy

Abuzneid

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…Wide dynamic range (WDR) image sensors are recently required for a variety of applications including security systems and automobiles. Many techniques for extending their dynamic range based on CMOS image sensor (CIS) technology have been reported [1,2,3,4,5,6,7,8,9,10,11,12]. Toward the goal for developing practically-advantageous WDR image sensors, the WDR technique used in the designed image sensors should maintain important imaging quality factors and functions such as low noise, high sensitivity, high spatial resolution, less motion artifact, wide linear response and flexible control of the dynamic range below its attainable dynamic range.…”

Section: Introductionmentioning

confidence: 99%

A Wide Dynamic Range CMOS Image Sensor with a Charge Splitting Gate and Two Storage Diodes

Seo

Kim

Yasutomi

et al. 2019

Sensors

View full text Add to dashboard Cite

In this paper, a wide dynamic range (WDR) CMOS image sensor (CIS) with a charge splitting gate (SG) and two storage diodes (SDs) is presented. By using single-gate on/off control with the SG, photocurrent path to the first (SD1) or second storage diodes (SD2) is switched alternatively and periodically during exposure and signal electrons generated in a photodiode (PD) are transferred to and accumulated in the SD1 or SD2. By setting a large ratio of the off-time to on-time of the SG, two different sensitivity signals, which are originated by the same photodiode, are generated and a WDR image signal is obtained. This technique has a distinct advantage on mitigating the problem of motion artifact in WDR imaging with high and low sensitivity signals and flexible dynamic control of the dynamic range. An experimental WDR CMOS image sensor with 280 (H) × 406 (V)-pixel array consisting of 14 sub-arrays, each of which have 20 (H) × 406 (V) pixels, was implemented and tested. For the SG on/off-time ratio of 30 and 279, the DR of 93 dB and 104 dB, respectively, was demonstrated. The effect of the proposed WDR imaging operation on the reduced motion artifact was experimentally confirmed.

show abstract