反射-折射多分辨率全向相机设计  

Design of multi-resolution omni-directional camera based on catadioptric principle

作　　者：李青[1] 郑南宁[1] 马琳[1] 程洪[1] 

机构地区：[1]西安交通大学人工智能与机器人研究所,陕西西安710049

出　　处：《光电工程》2006年第2期115-118,共4页Opto-Electronic Engineering

基　　金：国家自然科学基金优秀创新研究群体资助项目(60021302);国家自然科学基金资助项目(60205001);西安交通大学"十五";"211工程"建设项目;西安交通大学"行动计划"重点学科建设项目

摘　　要：为了满足智能车辆自动驾驶的需要,提出了一种真正单视点、多分辨率的反射-折射式系统,作为车载全向相机。该系统由光学反射器件和折射器件组成,由于使用了椭圆锥镜面的光学反射器件,故其是真正单视点的,能够为车辆前方场景提供比侧方更高的分辨率,同时具有宽广的视场。相机原型和仿真实验结果表明,它的水平分辨率和垂直视场随观察方位角的变化而变化,垂直分辨率不随方位角变化,可实现6倍的多分辨率和180°的大视场。Since existing vision system mounted in intelligent vehicle can not meet the requirements of high resolution in certain azimuth direction and wide field of view for automatic or assistant driving, a true single view point multi-resolution elliptical cone mirror catadioptric system with 180° horizontal field of view is suggested. The system provides higher resolution in look-ahead direction than that in lateral direction. An elliptical cone mirror is used as catoptric element and conventional perspective camera is used as dioptric element. Its vertical resolution, horizontal resolution and vertical field of view were calculated by pinhole imaging model and geometric optics image formation model. Simulating experiment results show that the system can realize 6 times of multi-resolution and 180° of field of view. Key words： Intelligent vehicle; Omni-directional camera; Multi-resolution; Elliptical cone mirror; Catadioptric system

关 键 词：智能车辆 全向相机 多分辨率 椭圆锥镜面 反射—折射系统 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]