JSSC 2014第1期Image SensorsCMOS Image Sensor

A3 4 - W Object-Adaptive CMOS Image Sensor With Embedded Feature Extraction Alg

一种低功耗对象自适应CMOS图像传感器，通过嵌入式特征提取算法显著降低功耗。

0.22 W/frame（运动传感模式）, 3.4 W/frame（特征提取模式）, 94.5%检测率

低功耗CMOS图像传感器对象自适应特征提取运动触发

▸嵌入式特征提取算法：该论文提出了一种嵌入式特征提取算法，通过混合信号电路实现，能够在芯片上直接提取图像特征，显著减少了数据传输和处理的功耗，检测率高达94.5%。

▸运动触发唤醒机制：论文设计了一种运动触发唤醒机制，传感器仅在检测到运动时唤醒并进行特征提取，大幅降低了静态场景下的功耗，节省了96.5%的空间带宽。

▸可重构差分像素架构：采用可重构差分像素架构，通过降低供电电压和优化像素结构，实现了低功耗的图像捕获和处理，每帧功耗仅为0.22μW（运动感知模式）和3.4μW（特征提取模式）。

▸对象自适应成像系统：该系统仅在检测到感兴趣对象时启动全图像捕获和传输，显著减少了传感器节点的功耗，同时优化了时空带宽利用率。

Abstract

We report a low-power object-adaptive CMOS imager, which suppresses spatial temporal bandwidth. The ob- ject-adaptive imager has embedd ed a feature extraction algorithm for identifying objects of interest. The sensor w akes up triggered by motion sensing and extracts features from the captured image for the detection of object-of-interest (OOI). Full-image capturing operation and image signal transmission are p erformed only when the interested objects are found, which signi ﬁcantly reduces pow