Binocular Stereovision Based Security Vehicles Spacing-survey Engineering Research

Binocular stereovision is a field of multi-subject crossed and one of the most important resources of computer accessing the environment information. Recently development of image science and enhancing of computer signal processing ability provide the well conditions for the study and application of binocular stereovision that becomes a new study emphasis and hotspot in computer vision field.Binocular stereovision has great application value in many fields that include auto driving, robot navigation and aerial survey, industrial inspection, production automatization, biology medicine, space telemetry, military reconnaissance, three-dimensional measurement and virtual realization, because it directly simulates pattern of human eyes processing scenery and has choiceness characteristics such as little size, light mass, performances credibility, vast information quality, little power consumption, low noise, high efficiency, low cost, big dynamical range, light measure accuracy. So studying on binocular stereovision has important academic significance, engineering application significance and utility significance.The thesis aims at rapidly increase of vehicle quantity in our nation, traffic accident occurring rate still in high position and traffic security problems increasingly outstanding, based on theories of binocular stereovision, image processing and pattern recognition, and puts forward a project of exploration and measuring safe distance of frontage vehicles according license plate as exploration of frontage vehicles. Firstly profound systemically studied on theory of binocular stereovision and two different kinds of binocular stereovision system, round the key technology of inside and outside parameters high accuracy pointing of binocular stereovision system in binocular stereovision, compare and analyze the many kinds of calibration pattern and control point and camera model. This thesis, combined the application environment, defines fit demarcating pattern and control point and camera model, and analyzes methods of camera demarcating based on those, confirms the demarcating project. Parameters that make from the project can emendate fault image and adapt the demands of measuring vehicle distance.In allusion to needs of binocular stereovision system measuring object vehicle and according vehicle brand as measuring, this thesis studies orientation method of vehicle brand based on gray image and color image, and designs a kind of orientation method of vehicle brand, based on vehicle brand area gray changing characteristic. Finally designs the experiment environment and takes the experiments which results been analyzed on detail. Results of these experiments indicate that the system is high precision, big range, feasibility and validity.This thesis has done a lot of prophase work of auto driving system with binocular stereovision. The work not only is the basis of binocular stereovision application of roadblock avoiding and route layout in auto driving system, but also makes the basis of consummate auto driving system with binocular stereovision.