Development of a System Measuring Vehicle Motions on Video Images

开发视频图像上测量车辆运动的系统

• 批准号: 05555148
• 负责人: KUWAHARA Masao
• 金额: $ 5.44万
• 依托单位: Tokyo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555148/
• 关键词: Image Processing; Automatic Tracking; Video Images; Trajectory of Vehicle Motion

This study develops the system of measuring vehicle motion on video images for the purpose of tracking vehicle trajectory. The video images are taken by the video camera being placed on an observation balloon, and covers about 200 meters' expressway section. After we established manual system of measuring, we developed automatic system of measuring and checked the system performance.In addition to usual observation index observed by traffic detectors such as traffic volume, density and velocity, this system enables to observe micro vehicle motions.The process of this system are consist of two parts as follows ;1.Image TransformationVideo Images are transformed to same coordinates as the standard image, by adjusting predetermined standard points.2.Vehicle RecognitionUsing transformed image each vehicles are recognized by comparing brightness with one of background.The system performance are checked by way of comparing performance of manual system with one of automatic system. In result, rate of vehicle recognition of automatic system is almost equal to one of manual system, however, accuracy of automatic system has some difference mainly caused by recognizing feeble reflective vehicle and tracks to one of manual system.

本研究开发了基于视频图像的车辆运动测量系统，以实现对车辆运动轨迹的跟踪。视频图像是由放置在观测气球上的摄像机拍摄的，覆盖了大约200米的高速公路路段。在建立了人工测量系统后，开发了自动测量系统，并对系统性能进行了检测。除了交通探测器通常观测到的交通量、密度、速度等观测指标外，该系统还可以观测到车辆的微观运动。本系统的开发过程主要包括以下两部分：1.系统设计；图像变换通过调整预定的标准点，将视频图像转换为与标准图像相同的坐标。车辆识别利用变换后的图像，通过对比背景亮度来识别车辆。通过对手动系统和自动系统性能的比较，对系统性能进行了检验。结果表明，自动系统的车辆识别率与手动系统的车辆识别率基本相等，但自动系统的识别精度与手动系统存在一定差异，这主要是由于对弱反射车辆和轨道的识别造成的。

项目成果

桑原研究室: "ビデオ画面上の車両走行軌跡のマニュアル計測ソフト" 生研リ-フレット. (1993)

桑原实验室：“视频屏幕上车辆轨迹的手动测量软件”Seiken Leaflet（1993）。

Kuwahara Lab: "Manual System of Measuring Vehicle Motions on Video Images" IIS leaflet. (1993)

桑原实验室：“视频图像上测量车辆运动的手动系统”IIS 传单。

陳鶴,桑原雅夫: "ビデオ画面上の車両走行軌跡のマニュアル計測ソフト" 生研リーフレット,ソフトウェアベース. 37. (1993)

陈河，Masao Kuwabara：“视频屏幕上车辆轨迹的手动测量软件”Seiken Leaflet，Software Base 37。（1993）

陳鶴・桑原雅夫: "移動するカメラで撮影したビデオ画面上の車両走行軌跡の計測21GC02:第49回土木学会年次講演会講演集" 674-675 (1994)

陈赫和桑原正夫：“用移动相机拍摄的视频屏幕上车辆行驶轨迹的测量21GC02：第49届日本土木工程学会年会论文集”674-675（1994）

Hao Chen & Masao Kuwahara: "Measuring Vehicle Motions on Video Images Taken by Unfixed Video Camera" Proceedings of the 49th Annual Conference of the Japan Society of Civil Engineering. 674-675 (1994)

陈浩