The Study On Fire Identify And Location In Long-highway-tunnel Based On Thermal Infrared Image

The construction of long-highway-tunnel,which makes districts tie more closely,greatly shortens the traffic mileage.Through the tunnels can improve the efficiency of driving,however car accident or goods in vehicle spontaneous combustion happened in tunnels caused efficiency decrease of driving,even result in a large number of losing about person and property.In the meantime,tunnel fire may be more difficult to be put out due to the space structure and special location compared with the indoor and outdoor fire disaster.This thesis studied on rescuing fire happened in tunnels,focused on using machine vision to identify and locate fire,aimed at providing technical support for timely and accurate fire putting,and then cutting losses in a great extent.Firstly,this thesis aimed at identifying and locating fire target in pixel coordinate from thermal infrared image.There are two kinds of methods for the issue,one is based on establishing three color flame model,after matching and segmentation to locate the pixel coordinate of the fire centroid.The other one is focused on extracting features about angle characteristics,regional correlation and regional stability of flame in thermal infrared image,which have been binarized,to identify and locate suspicious pixel coordinate region centroid.Then,on the basis of receiving fire target pixel coordinate combined results from two methods mentioned above,aiming at locating the fire in the world coordinate system.On the one hand,backward inferring the relationship matrix about pixel plane coordinate and world coordinate system,based on the information of three vanish points from thermal infrared image.On the other hand,finding out fitting functions of pixel coordinate and the world coordinate through a large amount of experimental data.At last,investigating the results of two different methods based on the ministry of public security fire products technical indicators.And analyzing the way to improve the location accuracy of fire source,giving different measures of advice for different scenes in the process of engineering application.