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 [1] presents a summary of these parameters and the parameters keys to be used in command-line and programming languages. Application key is RadiometricIndices .

[1]Table: Parameters table for Radiometric Indices.
Parameter Key Parameter Type Parameter Description
in Input image Input image
out Output image Output image
ram Int Int
channels Group Group
channels.blue Int Int
channels.green Int Int
channels.red Int Int
channels.nir Int Int
channels.mir Int Int
list List List
inxml XML input parameters file XML input parameters file
outxml XML output parameters file XML output parameters file

Input Image: Input image.

Output Image: Radiometric indices output image.

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

[Channels selection]: Channels selection.

  • Blue Channel: Blue channel index.
  • Green Channel: Green channel index.
  • Red Channel: Red channel index.
  • NIR Channel: NIR channel index.
  • Mir Channel: Mir channel index.

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 resources can be useful for further information:

otbVegetationIndicesFunctor, otbWaterIndicesFunctor and otbSoilIndicesFunctor classes