A Fully Reconfigurable Hybrid SPAD Vision Sensor with 134dB Dynamic Range Using Time-Coded Dual Exposures

📋 论文概要

本文提出了一种全可重构的混合SPAD视觉传感器，通过时间编码双曝光技术实现了超过134dB的动态范围，并支持强度与事件模式的自由混合与同时操作。该设计解决了传统混合传感器在动态范围、量化误差和事件噪声均匀性方面的关键问题。

💡 主要创新点

• 提出全可重构的像素架构，允许强度与事件模式自由混合并同时运行。
• 采用时间编码双曝光技术，通过编码饱和时间实现自适应二次曝光，将动态范围提升至134dB以上并降低量化误差。
• 实现像素级散粒噪声阈值的事件检测，在所有光照条件下保持均匀事件噪声低于0.46%。

🏷 关键词

📄 原文摘要

Abstract This paper presents a fully reconfigurable HDR intensity/event hybrid SPAD sensor. The fully reconfigurable scheme enables both pixel types to be freely blended and operated simultaneously. A time-coded dual exposure encodes saturation time to provide an adaptive secondary exposure, achieving >134dB DR in both modes while reducing quantization error of the time code. Event detection with pixel-wise shot-noise thresholding keeps uniform event noise <0.46% across all illumination conditions. Recently, hybrid image sensors that combine event-based vision sensors (EVSs) with conventional CMOS image sensors (CISs) have garnered significant attention for various applications, including consumer electronics, machine vision, and robotics, as they can detect motion events and intensity information of fast-moving objects [1-3]. Such imagers typically employ either two distinct pixel types or a time-division multiplexing architecture

👥 作者与机构

Kieop Hong1,2, Jubin Kang1,2, Jung-Hye Hwang1,2, Insang Son3, Seonghyeok Park3, Jung-Hoon Chun3,4, Jaehyuk Choi3,4, Seong-Jin Kim2

Ulsan National Institute of Science and Technology, Ulsan, Korea, 2Sogang University, Seoul, Korea, 3SolidVue, Seongnam, Korea, 4Sungkyunkwan University, Suwon, Korea