Pansharpening Sentinel-2 Imagery module


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Description


The Pansharpening Sentinel-2 Imagery module reads the input folder for Sentinel-2 panchromatic (PAN) image files and creates a pansharpening job for each image pair. File-based metadata tags from the source files are transferred to the output images.
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Parameters


Name Caption
Input Folder Input panchromatic image folder
Output Folder Output folder
Output File Type Output file type
Output File Options Output file options
Overwrite Results Overwrite existing results
Send Email Email notification settings
Pansharpening Method Pansharpening method to use
Resampling Method Resampling method
Enhance Whether to enhance UNB pansharpened images
Edge Sharpen Amount of sharpening to image edges
AdaptRadiometry Adapt radiometric values to input MS images
Source Background Type Source background type
Source Background Value Source background pixel value
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Parameter descriptions

Input Folder

The path and name of the folder that contains the Sentinel-2 imagery to pansharpen.

The input PAN images must be either:

Output Folder

The path and name of the folder to which to write the output files.

Output File Type

The format of the output file.

For more information on the supported file formats, see GDB-supported file formats.

Output File Options

The options to apply when creating the output file or files. The available options are specific to the file format; in each case, the default of no options is allowed.

For more information on the options available for the output file type you specify, see GDB-supported file formats.

Overwrite Results

Select this check box to overwrite the existing output files, if any exist. If this check box is left clear, and an output file exists in the relevant folder, the status of the job displays a message informing you of the existence and name of the output file. The message is also written to the event log of the job.

Send Email

If necessary, you can set up CATALYST Enterprise to send an email notification on job start and job completion.

With this check box selected, an email message is sent to each address specified in the Email Addresses box after the job starts and on completion.

You can specify one or more addresses, and each must be separated by a comma or a semi-colon. The email address of the user currently logged in displays by default.

Pansharpening Method

The method to use for pansharpening.
Available options are: With either method, both 8-bit and 16-bit data types are supported, and the images can be from the same or different sensors.

Resampling Method

Available only when UNB Pansharp is selected for Pansharpening Method, the resampling method to use during processing.

Available resampling options are:

Enhance

Specifies whether to generate a refined pansharpened image.

The enhance option is only available for UNB pansharpening.

Edge Sharpen

Amount of sharpening to image edges to apply. A value of 1.0 (default) means no edge sharpening. Values greater than 1.0 apply greater sharpening. Values greater than 2.0 are not recommended.

Applying edge sharpening makes image more visually appealing but may degrade radiometric similarity with the original multispectral (MS) data.

AdaptRadiometry

Method to adapt the output spectral values to those of the input multispectral (MS) image.

Adapting the radiometry can better match to the original multispectral image. The two methods are linear regression based on a small sliding window and an estimate of the Modulation Transfer Function (MTF).

Available options are:

Source Background Type

The method to use to determine which pixels in the source image to process as background (NoData) pixels. In general, if a pixel is considered NoData, the module processes it in a specific manner.

If the Any option or the All option is selected, a value must be specified for the Source Background Value parameter.

Available options are:

For specific examples, see the Source Background Value parameter description.

Source Background Value

The source background value or values when the Source Background Type parameter is set to:

The source background value is provided as either a single number (applied to all channels) or as a pixel "stack" (a comma-delimited list of values). If a pixel stack is provided, but the number of values does not equal the number of channels, the list is truncated or the last value is repeated as necessary. The background values provided is truncated to the range allowed by the source image data type.

The following examples apply to a 3-channel, 8-bit unsigned image:
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Details

General job details

Preprocessing requirements

Before running this module, the following requirements must be met to ensure the job processes successfully and produces accurate results:

Module details

The Pansharpening Sentinel-2 Imagery module automatically sharpens additional bands contained in the 20-meter and 60-meter swaths based on the 10-meter swath. All pansharpened bands are then merged into one file.

The output pansharpened image products will be a single file for each 10-meter, 20-meter, and 60-meter image pair.

The Pansharpening Sentinel-2 Imagery module supports processing using GPUs and multi-core processors.

Job results

For each image pair found in the input folder, the Pansharpening module creates a single pansharpened PCIDSK file.

Output image file names are structured as follows:

<SCENE_ID>_<STATE>_PSH.pix
where:
  • SCENE_ID: the scene ID of the image for the pansharpened image
  • STATE: indicates the current state of the image (ORTHO or RAW)
  • PSH: indicates that the output image is pansharpened

Output images are located in the folder specified for the Output Folder parameter.

This module transfers file-based metadata tags from the source files to the output. The transferred metadata information includes the date and time that the input scene was acquired, the sensor or platform name, and the ID of the scene.

The following metadata tags are transferred to the output:
  • Acquisition_DateTime
  • Acquisition_Date
  • Acquisition_Time
  • sensor
  • platform
  • PlatformName
  • PlatformNumber
  • sceneId

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