基于光谱夹角的水体信息提取方法研究
姜腾龙,赵书河,肖鹏峰,陈淑兴
南京大学地理信息科学系|南京210093
THE EXTRACTION OF WATERBODY INFORMATION BASED
ON THE SPECTRAL ANGLE
JIANG Teng-Long, ZHAO Shu-He, XIAO Peng-Feng, CHEN Shu-Xin
Department of Geographic Information Science| Nanjing University| Nanjing 210093| China
摘要 以南京幅Landsat ETM+数据(波段1~5、7)为信息源,通过分析不同地物的光谱特征,利用地物光谱夹角及反射率差异对水
体信息进行提取。首先,求出ETM+6个波段形成的4个光谱夹角(波段2~5); 然后,利用各地物在波段4的光谱夹角值差异,区分水
体、植被及阴影信息; 最后,利用波段4和波段5的反射率差异提取居民区信息。
关键词 :
合成孔径雷达 ,
图像复合 ,
铀源
Abstract : The waterbody information extraction method based on the spectral angle is proposed in this paper.
Nanjing was chosen as the study area and the Landsat ETM+ image (band 1~5, 7) was regarded as the test data. The
acquisition date of the image was July 17,2001 and the size of the image was 2048 columns by 2048 rows pixels. The
spectral characteristics of different ground objects in different bands were analyzed and four spectral angles (band
2~5) were calculated. Then the vegetation was separated using the differences of spectral angles in band 4. The
result of the separation of water information from shade was also quite well. Finally, the residential area was
separated easily using the differences of reflectance in band 4 and band 5.
Key words :
Synthetic aperture radar (SAR)
Image integration
Uranium resource
收稿日期: 2008-01-14
出版日期: 2009-06-12
基金资助: 由国家自然科学基金项目“高分辨率遥感数据决策级融合方法研究”(40501047)和国家科技基础性工作专项“中国湖泊
水质、水量和生物资源调查”(2006FY110600)共同资助。
通讯作者:
姜腾龙(1985- ),男,硕士研究生,研究方向为遥感数字图像处理及应用。
引用本文:
姜腾龙, 赵书河, 肖鹏峰, 陈淑兴. 基于光谱夹角的水体信息提取方法研究[J]. 国土资源遥感, 2009, 21(2): 102-105.
JIANG Teng-Long, ZHAO Shu-He, XIAO Peng-Feng, CHEN Shu-Xin. THE EXTRACTION OF WATERBODY INFORMATION BASED
ON THE SPECTRAL ANGLE. REMOTE SENSING FOR LAND & RESOURCES, 2009, 21(2): 102-105.
链接本文:
https://www.gtzyyg.com/CN/10.6046/gtzyyg.2009.02.21
或
https://www.gtzyyg.com/CN/Y2009/V21/I2/102
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