基于人脸识别定位的车外视觉改善系统关键技术研究

发布时间：2018-05-16 04:38

本文选题：车载系统 + 上下位机控制　；参考：《合肥工业大学》2017年硕士论文

【摘要】：随着汽车工业的高速发展,如何提高车辆的智能化,拓展车辆的功能来改善人们的驾驶体验和驾驶乐趣成为汽车技术的重要研究方向。本文研究并设计了一种可安装在车辆上的装置,实现驾乘者在车内看窗外景象时,可以任意设定其所看到的车外视觉环境且不影响驾驶安全,从而通过在视觉上对车外环境进行改善来提升驾乘者的驾驶体验及驾驶乐趣。并且利用该设备还能便于其它智能功能的实现,具有一定的扩展性。本文主要对车外视觉改善系统的研究设计过程做出分析阐述。首先明确了总体设计思路为使用摄像头对前方景物进行拍摄,并将经过处理的画面显示在挡风玻璃显示屏上。针对方案中会出现的画面错位问题进行分析,提出了使用基于人脸识别定位的可活动多摄像头的解决方法,即根据人脸位置确定摄像头的转角,使每个摄像头轴线通过人眼。之后根据设计所要达到的功能,按照电动机、传感器、控制芯片的选型规则,确定设计以PC为上位机,STC89C52RC为下位机主控芯片,结合PCF8591、ULN2003、步进电机、直线位移传感器等器件而成的一套反馈控制系统。该系统是一个软硬件相结合的综合性系统,包括摄像头活动平台、摄像头固定平台、双摄像头人脸识别定位程序、步进电机控制程序、传感器信号处理程序、串口通信及数据处理程序、视频采集处理程序等。本文对最终所搭建的实物平台进行了标定与调试工作,保证整套系统可正常运行并进行试验,验证了本设计方案的可行性和实用性,对于该装置未来的研究发展方向具有一定指导意义。
[Abstract]:With the rapid development of automobile industry, how to improve the intelligence of vehicles and expand the functions of vehicles to improve people's driving experience and driving fun has become an important research direction of automotive technology. This paper studies and designs a device that can be installed on a vehicle. When a driver looks out of the window of a car, he can set the visual environment he sees outside the vehicle without affecting the driving safety. Thus, the driver's driving experience and driving pleasure can be improved through visual improvement of the external environment. And the device can also facilitate the realization of other intelligent functions, and has a certain expansibility. In this paper, the research and design process of the external vision improvement system is analyzed and expounded. First, the overall design idea is to use the camera to shoot the front scene, and display the processed images on the windscreen display. Based on the analysis of the problem of image dislocation in the scheme, a new method is proposed to solve the problem of moving multi-camera based on face recognition, that is, to determine the rotation angle of the camera according to the position of the face, so that each axis of the camera can pass through the human eye. Then, according to the function to be achieved, according to the selection rules of motor, sensor and control chip, it is determined that the design takes PC as upper computer and STC89C52RC as master control chip of lower computer, combined with PCF8591 / ULN2003, step motor, A set of feedback control system composed of linear displacement sensor and other devices. The system is a software and hardware integrated system, including camera moving platform, camera fixed platform, dual camera face recognition and positioning program, step motor control program, sensor signal processing program. Serial communication and data processing procedures, video acquisition and processing procedures. In this paper, the calibration and debugging of the final physical platform are carried out to ensure the normal operation and test of the whole system, and the feasibility and practicability of the design scheme are verified. It has certain guiding significance for the future research and development of the device.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U463.6;TP391.41

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