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Automatic extraction of forest fire line using MODIS data by multi-spectral image gradient technique

遥感学报 2009年第3期13卷 535-541页

作者： FU Ying-chun1,2,YUAN Xiu-xiao2,SONG Yan2,CHEN Mi3,GUO Tai-sheng1 1.Geography School,South Normal University,Guangdong Guangzhou 510631,China 2.School of Remote Sensing and Information Engineering,Wuhan University,Hubei Wuhan 430079,China 3.Department of Educational Technology,Capital Normal University,Beijing 100037,China 华南师范大学地理科学学院广东广州 510631 武汉大学遥感信息工程学院湖北武汉 430079 首都师范大学教育技术系北京 100037

Remotely sensed infrared images are often used to assess forest fire ***,fire propagation mod-els are in use to forecast future *** traditional method of fire monitoring is mapping or extraction of burn scar and hotspot generally depending on abnormity character of spectral radiation and thermal infrared(TIR) *** the Dynamic Data-Driven Application System(DDDAS) concept,the fire propagation model will react to the image data,which should pro-duce more accurate predictions of fire *** the parameters of fire line and propagation direction extracted from the fire edge map are more important than burnt area estimation in real-time fire forecast *** method capable of auto-matically determining the fire perimeter,active fire line,and fire direction is developed in this paper based on some image proc-essing *** MODIS(Moderate resolution Imaging Spectrometer) is used as experimental data because of its widely spectral range bands and dynamic monitoring capacity for the ***,the optimal bands choice construction for spectral in-dices of NDBR(Normalized Difference Burn Ratio) capable of describing active fire intensity is *** the multi-spectral image gradient together with TIR channels and solar reflectance channels is used to map the fire edge which can be put on NDBR image for restriction against active fire *** B-spline model is applied to fit fire line segments to a spline curve for fire propagation front estimation by normal of the *** last,the kriging interpolation method based on hotspots with high gradient magnitude of fire line is used to extrapolate fire edge region to validate these *** image of forest fires located in Great Xing'an Mountains is processed and another image after 30mins is used as the referenced *** aspects prove that propagation of fire line are essentially consistent with the referenced *** expectation,entropy value of image conte

关键词： MODIS NDBR multi-spectral image gradient fire line extraction kriging interpolation

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