基于相对比率的高帧频图像采集器设计与实现  

The Design of High Frame Rate Image Acquisition System Based on Relative Ratio

作　　者：孙小进[1] 李平安[1] 黄秀亮[1] 

机构地区：[1]湖南信息职业技术学院电子工程学院,长沙410200

出　　处：《电子器件》2016年第4期957-963,共7页Chinese Journal of Electron Devices

基　　金：湖南省教育厅科学研究项目(15C0978)

摘　　要：为了在机器视觉应用中实现高动态范围HDR(High Dynamic Range)图像采集,提出一种基于检测像素相对比率的新型图像采集系统。提出的图像采集器使用全差分电路检测信号比,并通过基于数字计数器的紧凑列并行读出电路捕捉像素的脉冲宽度调制输出,系统设计了相应的光电流比检测像素方法,能独立地捕捉局部场景特征。实验结果显示:提出的COMS图像传感器性能较好,当标称帧频为9 600 frame/s时,提出的32像素×32像素阵列原型CMOS图像传感器消耗了4 m W的功率;当最大帧频为24 000 frame/s时,此图像传感器消耗了6.8 m W的功率。In order to achieve high dynamic range （HDR）image acquisition in machine vision applications, a novel image acquisition system based on the relative ratio of detection pixels is proposed. The proposed image acquisition device uses a fully differential circuit to detect the signal ratio, and the pulse width modulation output is captured by a compact column parallel readout circuit based on digital counter. And the method based on optical flow ratio is designed to detect the pixel, It can capture the local sceen features independently. The experimental results show that the proposed CMOS image sensor is of good performance, when the nominal frame rate is 9600 frame/s, the consumed power of the 32 pixel×32 pixel array prototype CMOS image sensor is 4 mW ; while the maximum frame rate is 24 frame/s, the consumed power of this sensor consumed is 6.8 mW.

关 键 词：CMOS图像传感器 高帧频 HDR 相对采集 机器视觉 

分 类 号：TP752[自动化与计算机技术—检测技术与自动化装置] TP391.41[自动化与计算机技术—控制科学与工程]