Lithological discrimination of Altun area in northwest China using Landsat TM data and geostatistical textural information

被引:4
作者
Li P. [1 ,2 ]
Li Z. [1 ]
Moon W.M. [2 ]
机构
[1] Institute of Remote Sensing and GIS, Peking University
[2] ESI3 Laboratory, School of Earth and Environmental Sciences, Seoul National University
关键词
Digital classification; Lithological discrimination; Rodogram; Texture; Variogram;
D O I
10.1007/BF02912700
中图分类号
学科分类号
摘要
The image texture was extracted from Landsat TM data using rodogram, a geostatistical function, and then added to multispectral classification for lithological discrimination of an arid region, the Altun Mountains in northwest China. The variogram analysis of the image of the study area indicates that the image has two scales of textures: local and regional textures. Therefore, two different window sizes, 17x17 pixels and 61x61 pixels were chosen to extract textural information using rodogram. The results of image classification show that the classification based on spectral data and geostatistical textural information produced much higher overall accuracy than with the spectral classification alone. Moreover, large window size, at which textural information was extracted and then used for image classification, achieved more accurate result than small window size.
引用
收藏
页码:293 / 300
页数:7
相关论文
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