A 1.36µW Adaptive CMOS Image Sensor with Reconfigurable Modes of Operation From Available Energy/Illumination for Distributed Wireless Sensor Network

📋 论文概要

提出一种1.36µW自适应CMOS图像传感器，支持可重构工作模式以适应可用能量和光照变化，解决户外监控中低功耗与图像质量的折衷问题。

💡 主要创新点

• 首次实现亚2µW功耗的CMOS图像传感器，通过自适应电压缩放和可重构模式在暗光下保持信噪比。
• 根据光照和能量条件动态调整传感器工作模式（如分辨率、帧率、增益），在极低功耗下提供可靠图像。

🏷 关键词

📄 原文摘要

For outdoor surveillance, sensitivity and dynamic range are important to deliver reliable images over widely changing illumination. However, constant monitoring with maximum awareness requires large power consumption and is not suitable for energy-limited applications such as battery-operated and/or energy-scavenging wireless sensor nodes. One of the ways to reduce power is voltage scaling [1-4]. However, it significantly reduces the SNR and results in poor image quality [4]. The signal can be easily corrupted from the noise in dark conditions or be saturated in bright conditions. Most imagers with high sensitivity and wide dynamic range [5,6] consume large power >50mW, unsuitable for wireless imager node applications. Therefore, it is imperative to implement a sensor adaptable to environmental changes: i.e., the sensor keeps monitoring at extremely low power operation and only turns into high-sensitivity or widedynamic-range operations when requested due to illumination changes or

👥 作者与机构

Jaehyuk Choi, Seokjun Park, Jihyun Cho, Euisik Yoon

University of Michigan, Ann Arbor, MI