Research on Fire Point Monitoring Based on GaoFen-4 Satellite Data With Bright Temperature Difference Correction
WANG Yao1,2, WANG Shi-xin1,2*, ZHOU Yi1,2, WANG Fu-tao1,2*, WANG Zhen-qing1,2
1. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：GF-4 can provide stable data for disaster prevention and mitigation, and its mid-infrared sensor can be well applied in rapid-fire monitoring. Because of lacking far-infrared, the spectral information that GF-4 provided is supplementary data as usual. Affected by a single band, the commission error and omission error of the adaptive threshold method is high. Therefore, to probe the potential of GF-4 data and improve the accuracy of fire point recognition, this study analyzed the characteristics of GF-4 data and proposed a fire point detection method with brightness temperature difference correction based on dual temporal image. The method mainly includes three parts: brightness temperature compensation acquisition based on Kriging interpolation on temporal scale, adaptive threshold segmentation on a spatial scale based on contextual information, and fire point detection, with two images-before and during the fire event. Firstly, the difference between the two images is processed. Moreover, we use this difference of non-polluted pixels in the dynamic neighborhood around the potential fire point as the sampling data for spatial interpolation and then substitute the result of the previous step into the first image. Finally, using discrimination conditions for fire point discrimination and false alarm elimination get the final results. The study also compares three spatial interpolation acquisitions: Inverse Distance Weigh, Simple Kriging and Ordinary Kriging. From the fitting results, the Ordinary Kriging can reflect the volatility of the pixel area and has a certain smoothing effect to avoid peaks of background brightness temperature, which is the better method. The study area contains two fires in Qinyuan, Shanxi Province and New Barhu Right Bannerin, Inner Mongolia. Results show that compared with the traditional single time phase algorithm, introducing brightness temperature difference correction data can better fit the background brightness temperature, reducing the commission error to 3% and obtaining comprehensive evaluation index Fβ above 0.9. This developed method could be used to support automatic fire point detection and extraction in future studies.
Key words：GaoFen-4; Fire point detection; Temperature compensation; Kriging
王 尧，王世新，周 艺，王福涛，王振庆. 基于GF-4 PMI数据的亮温差校正火点检测方法研究[J]. 光谱学与光谱分析, 2021, 41(11): 3595-3601.
WANG Yao, WANG Shi-xin, ZHOU Yi, WANG Fu-tao, WANG Zhen-qing. Research on Fire Point Monitoring Based on GaoFen-4 Satellite Data With Bright Temperature Difference Correction. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(11): 3595-3601.
[1] SHU Li-fu, TIAN Xiao-rui, LI Hong（舒立福, 田晓瑞, 李 红）. World Forestry Research（世界林业研究）, 1998，(6): 41.
[2] Giglio L, Descloitres J, Justice C O. Remote Sensing of Environment, 2003, 87(2-3): 273.
[3] Filizzola C, Corrado R, Marchese F. Remote Sensing of Environment, 2016, 186: 196.
[4] Jang E, Kang Y, Im J. Remote Sensing, 2019, 11(3): 271.
[5] LI Jia-guo, GU Xing-fa, YU Tao（李家国, 顾行发, 余 涛）. Journal of Beijing University of Aeronautics and Astronautics（北京航空航天大学学报）, 2010, 36(10): 1221.
[6] Lin L, Meng Y, Yue A. Remote Sensing, 2016, 8(5): 403.
[7] Lin Z Y, Chen F, Li B, et al. IEEE Trans. Geosci. Remote Sens.，2017, 55: 6420.
[8] RAO Yue-ming, WANG Chuan, HUANG Hua-guo（饶月明, 王 川, 黄华国）. Journal of Remote Sensing（遥感学报），2020, 24(5): 559.
[9] LIU Shu-chao, LI Xiao-tong, QIN Xian-lin, et al（刘树超, 李晓彤, 覃先林, 等）. Journal of Remote Sensing(遥感学报), 2020, 24(3): 215.
[10] Robinson J M. International Journal of Remote Sensing, 1991, 12(1): 3.
[11] Pereira M C, Setzer A W. International Journal of Remote Sensing, 1993, 14(11): 2061.
[12] LIU Xin-yan, SUN Lin, YANG Yi-kun（刘心燕, 孙 林, 杨以坤）. Acta Optica Sinica（光学学报）, 2019, 39(1): 0128001.
[13] XU Han-qiu（徐涵秋）. Journal of Remote Sensing（遥感学报）, 2005，(5): 589.
