<put algortithm description here>
Near Infrared Band
[raster]Red Band
[raster]Slope of the soil line
[number]<put parameter description here>
Default: 0.0
Intercept of the soil line
[number]<put parameter description here>
Default: 0.0
PVI (Richardson and Wiegand)
[raster]PVI (Perry & Lautenschlager)
[raster]PVI (Walther & Shabaani)
[raster]PVI (Qi, et al)
[raster]processing.runalg('saga:vegetationindexdistancebased', nir, red, slope, intercept, pvi, pvi1, pvi2, pvi3)