4.5.3 Radiometric indices extraction
This application computes radiometric indices using the channels of the input image. The output is a multi
band image into which each channel is one of the selected indices.
The RadiometricIndices application has the following input parameters:
- -in the input image to compute the features on
- -out the output image containing the radiometric indices
- -channels.blue the Blue channel index in the input image (default value is 1)
- -channels.green the Green channel index in the input image (default value is 1)
- -channels.red the Red channel index in the input image (default value is 1)
- -channels.nir the Near Infrared channel index in the input image (default value is 1)
- -channels.mir the Mid-Infrared channel index in the input image (default value is 1)
- -list the list of available radiometric indices (default value is Vegetation:NDVI)
The available radiometric indices to be listed into -list with their relevant channels in brackets
are:
Vegetation:NDVI - Normalized difference vegetation index (Red, NIR)
Vegetation:TNDVI - Transformed normalized difference vegetation index (Red, NIR)
Vegetation:RVI - Ratio vegetation index (Red, NIR)
Vegetation:SAVI - Soil adjusted vegetation index (Red, NIR)
Vegetation:TSAVI - Transformed soil adjusted vegetation index (Red, NIR)
Vegetation:MSAVI - Modified soil adjusted vegetation index (Red, NIR)
Vegetation:MSAVI2 - Modified soil adjusted vegetation index 2 (Red, NIR)
Vegetation:GEMI - Global environment monitoring index (Red, NIR)
Vegetation:IPVI - Infrared percentage vegetation index (Red, NIR)
Water:NDWI - Normalized difference water index (Gao 1996) (NIR, MIR)
Water:NDWI2 - Normalized difference water index (Mc Feeters 1996) (Green, NIR)
Water:MNDWI - Modified normalized difference water index (Xu 2006) (Green, MIR)
Water:NDPI - Normalized difference pond index (Lacaux et al.) (MIR, Green)
Water:NDTI - Normalized difference turbidity index (Lacaux et al.) (Red, Green)
Soil:RI - Redness index (Red, Green)
Soil:CI - Color index (Red, Green)
Soil:BI - Brightness index (Red, Green)
Soil:BI2 - Brightness index 2 (NIR, Red, Green)
The application can be used like this, which leads to an output image with 3 bands, respectively with
the Vegetation:NDVI, Vegetation:RVI and Vegetation:IPVI radiometric indices in this exact
order:
otbcli_RadiometricIndices -in InputImage
-out OutputImage
-channels.red 3
-channels.green 2
-channels.nir 4
-list Vegetation:NDVI Vegetation:RVI
Vegetation:IPVI
or like this, which leads to a single band output image with the Water:NDWI2 radiometric
indice:
otbcli_RadiometricIndices -in InputImage
-out OutputImage
-channels.red 3
-channels.green 2
-channels.nir 4
-list Water:NDWI2