图像时间校准系统设计  

Design of Image Time Calibration System

作　　者：杨德亮[1] 王彬 牛小铁[2] YANG Deliang;WANG Bin;NIU Xiaotie(School of Mechanical and Electrical Engineering,Beijing Polytechnic College,Beijing 100042,China;Beijing Institute of Electrical Safety,Beijing Polytechnic College,Beijing 100042,China)

机构地区：[1]北京工业职业技术学院机电工程学院,北京100042 [2]北京工业职业技术学院北京市电气安全技术研究所,北京100042

出　　处：《北京工业职业技术学院学报》2020年第3期1-5,88,共6页Journal of Beijing Polytechnic College

基　　金：中国博士后科学基金资助项目(2015M571051);2017年北京工业职业技术学院重点科研课题(BGZYKY201778Z)。

摘　　要：由于现有摄像机内没有校时功能,因此在多摄像机协作处理中,存在不同摄像机在采集图像时,被检测物体在时间和空间位置信息不一致的问题。针对该问题,提出一种图像时间校准系统。该系统包括:图像时间校准装置、授时信号源(标准时间接收机和晶振)、图像拍摄装置。图像时间校准装置根据获取的同步时间信息和图像拍摄装置的帧频信息,确定每帧图像的曝光触发时刻点,接收图像拍摄装置在曝光触发时刻点拍摄的帧图像,将曝光触发时刻点的时间信息进行编码后写入对应帧图像,形成带有系统同步时间的帧图像,实现图像拍摄装置的时间与如GPS/北斗等卫星接收机的标准时间统一。Because there is no time calibration function in the existing cameras,there is a problem that the information of the detected object in time and space is inconsistent when different cameras collect images in the cooperative processing of multi cameras. To solve this problem,an image time calibration system is proposed. The system includes: image time calibration device,time signal source( standard time receiver and crystal oscillator),image shooting device. According to the acquired synchronous time information and frame rate information of image capturing device,the image time calibration device determines the exposure trigger time point of each frame of image,receives the frame image captured by the image capturing device at the exposure trigger time point,encodes the time information of the exposure trigger time point,writes it into the corresponding frame image,forms the frame image with the system synchronous time,and realizes image capturing time of the camera is consistent with the standard time of satellite receivers such as GPS/BeiDou.

关 键 词：图像时间校准系统 系统设计 时间编码 帧图像 多摄像机协作 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]