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您的检索式：作者名="GENG XiuRui"
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| 1 | A cloud detection method based on a time series of MODIS surface reflectance images显示文摘The Moderate Resolution Imaging Spectroradiometer(MODIS)-Terra surface reflectance product(MOD09A1),with bands 1 to 7,is a gridded,eight-day composite product derived from the MODIS-Terra top of atmosphere reflectance swaths.It performs cloud detection and corrects for the effects of atmospheric gases and aerosols.The cloud mask(CM)algorithms for MODIS are based on empirical thresholds on spectral reflectance and brightness temperature.Since the spatial resolution of the thermal band is 1000 m,while that of MOD09A1 is 500 m,many undetected and false clouds are observed in MOD09A1.These errors always result in temporal and spatial inconsistencies in higher-level products.In this paper,a cloud detection algorithm(TSCD)based on a MOD09A1 time series is introduced.Time series cloud detection(TSCD)algorithm is based on the relative stability of ground reflectance and the sudden variations in reflectance that result from cloud cover.The algorithm first searches the clear-sky reference data,and then discriminates clouded and unclouded pixels by detecting a sudden change of reflectance in the blue wavelength and spectral correlation coefficient at the pixel level.Compared with cloud cover assessments obtained from MODIS’original CM,TSCD provides similar or better discrimination in most situations when the land surface changes slowly. | Hairong Tang Kai Yu Olivier Hagolle Kang Jiang Xiurui Geng Yongchao Zhao | 2013 | International Journal of Digital Earth2013，6，S01： | 2 |
| 2 | Matrix calculation of high-dimensional cross product and its application in automatic recognition of the endmembers of hyperspectral imagary显示文摘This paper gives the definition of the high-dimensional cross product and its calculation by extending the 3-D cross product definition into the high-dimensional vector space.Based on the properties of the cross product,the volume variance index(VVI)is proposed to be used in extracting automatically the endmembers of the hypherspectral imagery which eliminates the shortcoming of the traditional method of using simplex only where the extraction results were easily impacted by the abnormal pixels.A case study of endmembers extraction experiment using the VVI method with the AVIRIS data for Cuprite has shown a very good result. | GENG XiuRui ZHAO YongChao LIU SuHong WANG FuXiang | 2011 | Science China(Information Sciences)2011，54，1： | 0 |
| 3 | TOPOGRAPHIC CORRECTION OF ETM IMAGES BASED ON SMOOTHED TERRAIN显示文摘A new empirical topographic correction method is proposed in this paper. The main idea of the new method is smoothing the slope angle of terrain in the first place and then performing the cosine correction based on the smoothed terrain. A comparison is conducted among the new method and several other common methods using Landsat-7 ETM+ data. Visual analysis and statistical analysis are adopted to assess the performance of these methods from two aspects: overcorrection, homogeneity within a land cover class. Comparison results indicate that the new method is superior to the cosine correction, Gamma correction, Sun-Canopy-Sensor correction, and Minnaert correction. Compared with common methods, the proposed one can eliminate overcorrection better and is an effective topographic correction method. | Jiang Kang Zhao Yongchao Geng Xiurui Tang Hairong | 2012 | Journal of Electronics(China)2012，29，3： | 0 |
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