Technology and Methodology |
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A METHOD FOR DETECTING CLOUD PIXELS ON NOAA-AVHRR IMAGE USING THREE-DIMENSION STATISTIC GRAPH AND SET DISCRIMINATION |
Yang Junquan1, Shen Jianzhong1, Mo Weihua2, Zhang Yuanfei3, Chen Shangwen1, Lin Shaoxiong4 |
1. Forestry College, Guangxi University, Nanning 530001;
2. Guangxi Meteorological Observatory, Nanning 530022;
3. Research Institute of Geology for Mineral Resources, Guilin 541004;
4. Guangxi Meteorological Bureau, Nanning 530021 |
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Abstract The detection of cloud pixels is the essential for monitoring resources and environment of the earth using NOAA-AVHRRimage. The paper analyses the feature of the clouds on NOAA-AVHRRdata by instances, draws 3D-statistic graph according to the feature indexes, and decides the thresholds of cloud pixels directly from the graph. The thresholds are regarded as the setting condition for detecting the cloud pixels automatically. The advantages of above method are higher sensitivity and better stability and that the viewing for the distribution of cloud pixels is more directly.
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Keywords
Three Gorges reservoir areas
Airborne remote sensing
“3S&rdquo
technique
Dynamic monitoring
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Issue Date: 02 August 2011
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