isinstance(object, classinfo) checks only if object has correct python type, not value. Let's try this with more traditional method ;)
Former-commit-id: 37e49b132c
Vegetation Indexes for Visible RGB imagery calculations,
Usage: ./vegind.py <orto.tif> index
Available indexes: ngrdi (Normalized green red difference index), vari (Visible Atmospheric Resistant Index), tgi (Triangular Greenness Index).
Work inspired by DroneDeploy Plant Health app, that uses VARI index too.
Former-commit-id: 98a92905d9