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library path:	D:\projects\sextante\workspaces\gvsig_1_11\_fwAndami\gvSIG\extensiones\es.unex.sextante\saga\modules
library name:	imagery_tools
module name :	Vegetation Index[distance based]
author      :	Copyrights (c) 2004 by Victor Olaya
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go...
Usage: 0 -NIR <str> -RED <str> [-SLOPE <str>] [-INTERCEPT <str>] -PVI <str> [-PVI1 <str>] [-PVI2 <str>] [-PVI3 <str>]
  -NIR:<str>      	Near Infrared Band
	Grid (input)
  -RED:<str>      	Red Band
	Grid (input)
  -SLOPE:<str>    	Slope of the soil line
	Floating point
  -INTERCEPT:<str>	Intercept of the soil line
	Floating point
  -PVI:<str>      	PVI (Richardson and Wiegand)
	Grid (output)
  -PVI1:<str>     	PVI (Perry & Lautenschlager)
	Grid (optional output)
  -PVI2:<str>     	PVI (Walther & Shabaani)
	Grid (optional output)
  -PVI3:<str>     	PVI (Qi, et al) 
	Grid (optional output)
