Research On Automatic Fire Location In Large Space Buildings

With the progress of national economy in China and the rapid development oftechnology, the large space building is increasing, its internal structure is complex andparticular. Once the fire can’t be fighting, will cause a certain degree of damage toproperty. Be well applied based on stereo vision technology in a large space buildingsfire source automatic location technology, using intelligent fire monitor in real time onthe large space building fire source to automatically locate and fight, early in theprocess to fire is an important part of fire. Lack of artillery fire against theconventional wisdom in the large space buildings fire automatically locating the sourceof poor and low-skilled real-time positioning accuracy, in this paper, a parallelbinocular stereo vision of large space fire source based on automatic positioningtechnology, determine the source of large space buildings fire three-dimensionalcoordinate information, drive intelligent fire artillery equipment for automatic locationand fighting. This paper focuses on the camera calibration, stereo matching algorithmsto improve the fire source automatic positioning accuracy. Mainly in these areas.(1)Camera calibration. Direct linear transformation DLT algorithm is used topreprocess checkerboard image, in order to eliminat the distortion and blur. This paperresearch on the theory of Zhang Zhengyou plane calibration algorithm. Because theHarris algorithm is stable, fast and accurate in detection of characteristic points,camera calibration algorithm is proposed based on the Harris algorithm:Harris-ZhangZhengyou plane calibration algorithm. By the checkerboard form images taken on theform of parallel binocular CCD camera calibration, obtained internal and externalcamera parameters information. (2)Stereo matching. SURF algorithm in illumination, translation, rotation, scalingand radiation is stable, effective in real-time and robust. Using the improvedHarris-SURF stereo matching algorithm is a large space building real fire source imageof direct linear transformation DLT calibration preprocessing algorithm to featureextraction and matching, draw large space fire source depth information andthree-dimensional coordinate information.Verified by simulation results, the algorithm of this paper improve the fire sourceautomatic positioning accuracy and meet the large space fire automatically locate thesource of real-time requirements.