4.6.11 Radiometric Indices

Compute radiometric indices.

Detailed description

This application computes radiometric indices using the relevant channels of the input image. The output is a multi band image into which each channel is one of the selected indices.

Parameters

This section describes in details the parameters available for this application. Table 4.96, page 627 presents a summary of these parameters and the parameters keys to be used in command-line and programming languages. Application key is RadiometricIndices.





Parameter key

Parameter type

Parameter description




in

Input image

Input Image

out

Output image

Output Image

ram

Int

Available RAM (Mb)

channels

Group

Channels selection

channels.blue

Int

Blue Channel

channels.green

Int

Green Channel

channels.red

Int

Red Channel

channels.nir

Int

NIR Channel

channels.mir

Int

Mir Channel

list

List

Available Radiometric Indices

inxml

XML input parameters file

Load otb application from xml file

outxml

XML output parameters file

Save otb application to xml file











Table 4.96: Parameters table for Radiometric Indices.

Input Image Input image

Output Image Radiometric indices output image

Available RAM (Mb) Available memory for processing (in MB)

Channels selection Channels selection

Available Radiometric Indices List of available radiometric indices with their relevant channels in brackets:
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)

Load otb application from xml file Load otb application from xml file

Save otb application to xml file Save otb application to xml file

Example

To run this example in command-line, use the following:

otbcli_RadiometricIndices -in qb_RoadExtract.tif -list Vegetation:NDVI Vegetation:RVI Vegetation:IPVI -out RadiometricIndicesImage.tif

To run this example from Python, use the following code snippet:

#!/usr/bin/python 
 
# Import the otb applications package 
import otbApplication 
 
# The following line creates an instance of the RadiometricIndices application 
RadiometricIndices = otbApplication.Registry.CreateApplication("RadiometricIndices") 
 
# The following lines set all the application parameters: 
RadiometricIndices.SetParameterString("in", "qb_RoadExtract.tif") 
 
# The following line execute the application 
RadiometricIndices.ExecuteAndWriteOutput()

Limitations

None

Authors

This application has been written by OTB-Team.

See also

These additional ressources can be useful for further information: