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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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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.
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Keywords
forced invariance
vegetation suppression
subsection leveling
alteration information extraction
southern vegetation area
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Issue Date: 23 May 2019
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