LocalStatisticExtraction - 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 Name	Parameter Type
in	Input Image	Input image
channel	Selected Channel	Int
ram	Available RAM (Mb)	Int
radius	Neighborhood radius	Int
out	Feature Output Image	Output image
inxml	Load otb application from xml file	XML input parameters file
outxml	Save otb application to xml 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.