Local Statistic Extraction

Computes local statistical moments on every pixel in the selected channel of the input image

Detailed description

This application computes the 4 local statistical moments on every pixel in the selected channel of the input image, over a specified neighborhood. The output image is multi band with one statistical moment (feature) per band. Thus, the 4 output features are the Mean, the Variance, the Skewness and the Kurtosis. They are provided in this exact order in the output image.

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 LocalStatisticExtraction .

[1]Table: Parameters table for Local Statistic Extraction.
Parameter Key Parameter Type Parameter Description
in Input image Input image
channel Int Int
ram Int Int
radius Int Int
out Output image Output image
inxml XML input parameters file XML input parameters file
outxml XML output parameters file XML output parameters file
  • Input Image: The input image to compute the features on.
  • Selected Channel: The selected channel index.
  • Available RAM (Mb): Available memory for processing (in MB).
  • Neighborhood radius: The computational window radius.
  • Feature Output Image: Output image containing the local statistical moments.
  • 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_LocalStatisticExtraction -in qb_RoadExtract.tif -channel 1 -radius 3 -out Statistics.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 LocalStatisticExtraction application
LocalStatisticExtraction = otbApplication.Registry.CreateApplication("LocalStatisticExtraction")

# The following lines set all the application parameters:
LocalStatisticExtraction.SetParameterString("in", "qb_RoadExtract.tif")

LocalStatisticExtraction.SetParameterInt("channel", 1)

LocalStatisticExtraction.SetParameterInt("radius", 3)

LocalStatisticExtraction.SetParameterString("out", "Statistics.tif")

# The following line execute the application
LocalStatisticExtraction.ExecuteAndWriteOutput()

Limitations

None

Authors

This application has been written by OTB-Team.

See Also

These additional resources can be useful for further information:

otbRadiometricMomentsImageFunction class