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国土资源遥感  2019, Vol. 31 Issue (2): 82-88    DOI: 10.6046/gtzyyg.2019.02.12
  技术方法 本期目录 | 过刊浏览 | 高级检索 |
南方植被区强迫不变植被抑制技术改进与应用
尹展1,张利军2,段建良1,张沛1
1.有色金属矿产地质调查中心,北京 100012
2.湖南省有色地质勘查研究院,长沙 410083
Improvement and application of forced invariance vegetation suppression in southern vegetation area
Zhan YIN1,Lijun ZHANG2,Jianliang DUAN1,Pei ZHANG1
1.China Non-Ferrous Metals Resource Geological Survey, Beijing 100012, China
2.Research Institute of Hunan Provincial Nonferrous Metals Geological Exploration Bureau, Changsha 410083, China
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摘要 

植被覆盖对岩石蚀变信息提取造成很大的干扰。强迫不变植被抑制技术在半干旱开阔地形区取得了较好的植被抑制效果,但在植被茂盛的山区效果有待验证。基于强迫不变植被抑制技术,针对南方植被区,在关键技术曲线平化步骤中采用分段平化并编程实现,较好地解决了植被抑制、裸地偏色及信息完整性之间的矛盾。分段平化后的植被信息得到较好抑制,下伏基岩信息突出,色调自然。应用该方法进行遥感蚀变信息提取,植被区遥感异常明显增强,异常与实际围岩蚀变吻合度较高,效果较好。

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尹展
张利军
段建良
张沛
关键词 强迫不变植被抑制分段平化蚀变信息提取南方植被区    
Abstract

Vegetation cover causes great interference in rock alteration information extraction. Forcing invariant vegetation suppression technology has achieved good vegetation suppression effect in semi-arid and open terrain area, but the effect remains to be verified in mountainous areas where vegetation is flourishing. Based on the forcing invariant vegetation suppression technology, in the southern vegetation area, the subsection leveling and programming are implemented in the key technical curve leveling steps, which can solve the contradiction between vegetation suppression, color deviation in bare land and information integrity. The vegetation information after subsection leveling is well suppressed, and the underlying bedrock information is prominent and the tone is natural. By using this method to extract remote sensing alteration information, the vegetation area’s remote sensing anomaly is obviously enhanced, the anomaly agrees well with the actual wall rock alteration, and the effect is better.

Key wordsforced invariance    vegetation suppression    subsection leveling    alteration information extraction    southern vegetation area
收稿日期: 2018-03-30      出版日期: 2019-05-23
ZTFLH:  TP79  
基金资助:中国地质调查局重要矿产资源调查计划项目“湖南省沅陵县北部地区铜金多金属矿产地质调查”资助(12120115028801)
作者简介: 尹 展(1986-),男,工程师,主要从事遥感地质方面的研究。Email: 202yz@163.com。
引用本文:   
尹展,张利军,段建良,张沛. 南方植被区强迫不变植被抑制技术改进与应用[J]. 国土资源遥感, 2019, 31(2): 82-88.
Zhan YIN,Lijun ZHANG,Jianliang DUAN,Pei ZHANG. Improvement and application of forced invariance vegetation suppression in southern vegetation area. Remote Sensing for Land & Resources, 2019, 31(2): 82-88.
链接本文:  
http://www.gtzyyg.com/CN/10.6046/gtzyyg.2019.02.12      或      http://www.gtzyyg.com/CN/Y2019/V31/I2/82
Fig.1  各波段光谱值与NDVI散点图
Fig.2  各波段光谱值与NDVI散点图的拟合曲线及平滑曲线
Fig.3  OLI数据B2植被指数对应地物分类
波段 NDVI分段对应平化值
[0,150) [150,200) [200,255]
B2 750 1 180 620
B3 860 1 230 825
B4 640 1 360 845
B5 125 3 550 3 620
B6 125 4 550 2 850
B7 110 3 360 2 150
Tab.1  各波段分段平化值
Fig.4  强迫不变植被抑制影像对比
Fig.5  遥感蚀变信息效果对比
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