2017-06-28 18:39:20 +00:00
# Visible Vegetation Indexes
This script produces a Vegetation Index raster from a RGB orthophoto (odm_orthophoto.tif in your project)
## Requirements
* rasterio (pip install rasterio)
* numpy python package (included in ODM build)
## Usage
```
vegind.py < orthophoto.tif > index
positional arguments:
< orthophoto.tif > The RGB orthophoto. Must be a GeoTiff.
index Index identifier. Allowed values: ngrdi, tgi, vari
2017-06-28 18:42:48 +00:00
```
2017-06-28 18:39:20 +00:00
Output will be generated with index suffix in the same directory as input.
## Examples
`python vegind.py /path/to/odm_orthophoto.tif tgi`
Orthophoto photo of Koniaków grass field and forest in QGIS: 
The Triangular Greenness Index output in QGIS (with a spectral pseudocolor): 
Visible Atmospheric Resistant Index: 
Normalized green-red difference index: 
## Bibliography
1. Hunt, E. Raymond, et al. "A Visible Band Index for Remote Sensing Leaf Chlorophyll Content At the Canopy Scale." ITC journal 21(2013): 103-112. doi: 10.1016/j.jag.2012.07.020
(https://doi.org/10.1016/j.jag.2012.07.020)
