TAVI CALCULATION METHOD BASED ON WAVEBAND RATION MODEL AND SOLAR ELEVATION ANGLE

WIPO Patent Application WO/2018/028191

A1

A TAVI calculation method based on a waveband ratio model and solar elevation angle, comprising the following steps: performing image pre-processing to obtain remote sensing image apparent reflectance data; analysing image quality and numerical distribution; calculating a shadow vegetation index; constructing a TAVI combined algorithm: ; using the solar elevation angle to calculate an adjustment factor f(Δ); and finally obtaining TAVI vegetation information resistant to topographical influence. Said TAVI is composed of the two waveband ratio sub-models RVI and SVI, the denominator thereof being remote sensing image red light waveband data, the adjustment factor f(Δ) using the solar elevation angle as a calculation parameter, and a sensor factor being introduced, having high physical significance; the TAVI calculation method does not require DEM data and remote sensing image classification and also does not rely on ground survey data, and ensures that the TAVI can effectively eliminate the interference of topographical influence on vegetation information, avoiding the problem of reduced ground feature and vegetation information inversion accuracy due to the difference in accuracy of remote image and DEM data alignment.

JIANG HONG (CN)
WANG XIAOQIN (CN)
CHEN CHONGCHENG (CN)

PCT/CN2017/076022

February 15, 2018

March 09, 2017

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UNIV FUZHOU (CN)

G01S17/89

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FUZHOU YUANCHUANG PATENT AND TRADEMARK AGENCY LTD. (CN)

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