SFS Texture Extraction¶

Computes Structural Feature Set textures on every pixel of the input image selected channel

Detailed description¶

This application computes SFS textures on a mono band 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 SFSTextureExtraction .

[1]	Table: Parameters table for SFS Texture Extraction.

Parameter Key	Parameter Type	Parameter Description
in	Input image	Input image
channel	Int	Int
ram	Int	Int
parameters	Group	Group
parameters.spethre	Float	Float
parameters.spathre	Int	Int
parameters.nbdir	Int	Int
parameters.alpha	Float	Float
parameters.maxcons	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).

Texture feature parameters This group of parameters allows one to define SFS texture parameters. The available texture features are SFS’Length, SFS’Width, SFS’PSI, SFS’W-Mean, SFS’Ratio and SFS’SD. They are provided in this exact order in the output image.

Spectral Threshold: Spectral Threshold.
Spatial Threshold: Spatial Threshold.
Number of Direction: Number of Direction.
Alpha: Alpha.
Ratio Maximum Consideration Number: Ratio Maximum Consideration Number.

Feature Output Image Output image containing the SFS texture features.

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_SFSTextureExtraction -in qb_RoadExtract.tif -channel 1 -parameters.spethre 50.0 -parameters.spathre 100 -out SFSTextures.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 SFSTextureExtraction application
SFSTextureExtraction = otbApplication.Registry.CreateApplication("SFSTextureExtraction")

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

SFSTextureExtraction.SetParameterInt("channel", 1)

SFSTextureExtraction.SetParameterFloat("parameters.spethre", 50.0)

SFSTextureExtraction.SetParameterInt("parameters.spathre", 100)

SFSTextureExtraction.SetParameterString("out", "SFSTextures.tif")

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

Limitations¶

None

Authors¶

This application has been written by OTB-Team.