An Integrated Field and Hyperspectral Remote Sensing Method for the Estimation of Pigments Content of Stipa Purpurea in Shenzha, Tibet

Table 1

High spectral characteristic parameter selection.

Types	Name	Abbreviation	Calculation formula	Literature
Spectral area and location parameters	Blue margin value		Maximum of first derivative spectrum in 490 to 520 nm wavelength	Elvidge et al., 1995
	Blue margin area		Integration of first derivative in 490 to 520 nm wavelength	Elvidge et al., 1995
	Yellow margin value		Maximum of first derivative spectrum in 560 to 640 nm wavelength	Elvidge et al., 1995
	Yellow margin area		Integration of first derivative in 560 to 640 nm wavelength	Elvidge et al., 1995
	Red margin value		Maximum of first derivative spectrum in 670 to 760 nm wavelength	Elvidge et al., 1995
	Red margin area		Integration of first derivative in 670 to 760 nm wavelength	Pu et al., 1993
	Green peak reflectance		Maximum of band reflectance in 520 to 560 nm wavelength	Elvidge et al., 1995
	Green peak area		Area of original spectrum in 520 to 560 nm wavelength	Elvidge et al., 1995
	Red valley reflectance		Minimum of band reflectance in 650 to 690 nm wavelength	Elvidge et al., 1995
Ratio parameters of spectral area and location	Ratio between green peak reflectance and red valley reflectance	VI1		Gitelson et al., 1996
	Normalization value of green peak reflectance and red valley reflectance	VI2		Gitelson et al., 1996
	Ratio between red margin area and blue margin area	VI3		Gitelson et al., 2003
Vegetation indices	Ratio vegetation index	RVI		Jordan, 1969
	Normalized difference vegetation index	NDVI		Rouse, 1973
	Enhanced vegetation index	EVI		Liu, 1995
	Again normalized difference vegetation index	RDVI		Richardson, 1992