Bundle to perfect sensor

Perform P+XS pansharpening

Detailed description

This application performs P+XS pansharpening. The default mode use Pan and XS sensor models to estimate the transformation to superimpose XS over Pan before the fusion (“default mode”). The application provides also a PHR mode for Pleiades images which does not use sensor models as Pan and XS products are already coregistered but only estimate an affine transformation to superimpose XS over the Pan.Note that this option is automatically activated in case Pleiades images are detected as input.

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 BundleToPerfectSensor .

[1]Table: Parameters table for Bundle to perfect sensor.
Parameter Key Parameter Type Parameter Description
inp Input image Input image
inxs Input image Input image
out Output image Output image
elev Group Group
elev.dem Directory Directory
elev.geoid Input File name Input File name
elev.default Float Float
mode Choices Choices
mode default Choice Default mode
mode phr Choice Pleiades mode
lms Float Float
fv Float Float
ram Int Int
inxml XML input parameters file XML input parameters file
outxml XML output parameters file XML output parameters file

Input PAN Image: Input panchromatic image.

Input XS Image: Input XS image.

Output image: Output image.

[Elevation management]: This group of parameters allows managing elevation values. Supported formats are SRTM, DTED or any geotiff. DownloadSRTMTiles application could be a useful tool to list/download tiles related to a product.

  • DEM directory: This parameter allows selecting a directory containing Digital Elevation Model files. Note that this directory should contain only DEM files. Unexpected behaviour might occurs if other images are found in this directory.
  • Geoid File: Use a geoid grid to get the height above the ellipsoid in case there is no DEM available, no coverage for some points or pixels with no_data in the DEM tiles. A version of the geoid can be found on the OTB website (http://hg.orfeo-toolbox.org/OTB-Data/raw-file/404aa6e4b3e0/Input/DEM/egm96.grd).
  • Default elevation: This parameter allows setting the default height above ellipsoid when there is no DEM available, no coverage for some points or pixels with no_data in the DEM tiles, and no geoid file has been set. This is also used by some application as an average elevation value.

Mode: Superimposition mode. Available choices are:

  • Default mode: Default superimposition mode : uses any projection reference or sensor model found in the images.
  • Pleiades mode: Pleiades superimposition mode, designed for the case of a P+XS bundle in SENSOR geometry. It uses a simple transform on the XS image : a scaling and a residual translation.

Spacing of the deformation field: Spacing of the deformation field. Default is 10 times the PAN image spacing.

Fill Value: Fill value for area outside the reprojected image.

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

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_BundleToPerfectSensor -inp QB_Toulouse_Ortho_PAN.tif -inxs QB_Toulouse_Ortho_XS.tif -out BundleToPerfectSensor.png uchar

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 BundleToPerfectSensor application
BundleToPerfectSensor = otbApplication.Registry.CreateApplication("BundleToPerfectSensor")

# The following lines set all the application parameters:
BundleToPerfectSensor.SetParameterString("inp", "QB_Toulouse_Ortho_PAN.tif")

BundleToPerfectSensor.SetParameterString("inxs", "QB_Toulouse_Ortho_XS.tif")

BundleToPerfectSensor.SetParameterString("out", "BundleToPerfectSensor.png")
BundleToPerfectSensor.SetParameterOutputImagePixelType("out", 1)

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

Limitations

None

Authors

This application has been written by OTB-Team.