.. _Pansharpening: 

Pansharpening
=============





Perform P+XS pansharpening

Description
-----------

This application performs P+XS pansharpening. :ref:`Pansharpening` is a process of merging high-resolution panchromatic and lower resolution multispectral imagery to create a single high-resolution color image. Algorithms available in the applications are: RCS, bayesian fusion and Local Mean and Variance Matching(LMVM).



Parameters
----------

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**Input PAN Image** :code:`-inp image` *Mandatory* |br|
 Input panchromatic image.

**Input XS Image** :code:`-inxs image` *Mandatory* |br|
 Input XS image.

**Output image** :code:`-out image [dtype]` *Mandatory* |br|
Output image.

**Algorithm** :code:`-method [rcs|lmvm|bayes]` *Default value: rcs* |br|
Selection of the pan-sharpening method.

* **RCS** |br| Simple RCS Pan sharpening operation.

* **LMVM** |br| Local Mean and Variance Matching (LMVM) Pan sharpening.

* **Bayesian** |br| Bayesian fusion.



RCS options
^^^^^^^^^^^

**X radius** :code:`-method.rcs.radiusx int` *Default value: 9* |br|
Set the x radius of the sliding window.

**Y radius** :code:`-method.rcs.radiusy int` *Default value: 9* |br|
Set the y radius of the sliding window.

LMVM options
^^^^^^^^^^^^

**X radius** :code:`-method.lmvm.radiusx int` *Default value: 3* |br|
Set the x radius of the sliding window.

**Y radius** :code:`-method.lmvm.radiusy int` *Default value: 3* |br|
Set the y radius of the sliding window.

Bayesian options
^^^^^^^^^^^^^^^^

**Weight** :code:`-method.bayes.lambda float` *Default value: 0.9999* |br|
Set the weighting value.

**S coefficient** :code:`-method.bayes.s float` *Default value: 1* |br|
Set the S coefficient.



------------

**Available RAM (MB)** :code:`-ram int` *Default value: 256* |br|
Available memory for processing (in MB).



Examples
--------

From the command-line:

.. code-block:: bash

    otbcli_Pansharpening -inp QB_Toulouse_Ortho_PAN.tif -inxs QB_Toulouse_Ortho_XS.tif -out Pansharpening.tif uint16


From Python:

.. code-block:: python

	import otbApplication

	app = otbApplication.Registry.CreateApplication("Pansharpening")

	app.SetParameterString("inp", "QB_Toulouse_Ortho_PAN.tif")
	app.SetParameterString("inxs", "QB_Toulouse_Ortho_XS.tif")
	app.SetParameterString("out", "Pansharpening.tif")
	app.SetParameterOutputImagePixelType("out", 3)

	app.ExecuteAndWriteOutput()