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Purpose

 

Pixel with no-value can be interpolated, over a window of specified dimension, in order to remove dummy areas. Data filtering based on the pixel mean value calculation can be performed.

This tool is intended to be used to fill holes in Digital Elevation Models.

 

Technical Note

 

The interpolated value is calculated as the average of the valid values in a window of the specified size. When the relax  flag is set, the interpolation process uses a soft surface, which is adapted to the dummy surrounding area. The relax model, which applies an algorithm based on the solution of the heat transfer equation (Poisson equation), uses known height values to reconstruct at the best the unknown topography; for this reason it is optimally suited to interpolate Digital Elevation Models. The result of the relax interpolation can be not reliable in case abrupt slope changes are present within the same dummy area to be interpolated.

 

This tool is intended to be used to fill holes in Digital Elevation Models.

 

Input File(s)

 

Input file

Input file name of the data to be processed. This file is mandatory.

 

Output file

Output file name of the interpolated/filtered data. This file is mandatory.

 

Input Parameter(s)

 

Mean window size

Window dimension for the mean filtering. This filter is aimed at reducing the noise and smoothing pixel value variations within the specified window. If zero is entered, the mean filtering is not applied.

 

Interpolation window size

Window dimension used for the interpolation. In case all dummy pixels have to be replaced with valid values, the window size must be at least as big as the largest dummy area in the input data. If zero is entered, the interpolation is not applied.

 

Relax Interpolation

By setting this flag the relax interpolation is carried out.

 

Output(s)

 

_rsp        

Interpolated/filtered data and associated header files (.sml, .hdr).

 

Details specific to the Units of Measure and Nomenclature of the output products can be found in the Data Format section.

 

Input Files

 

Input file

Input file name of the data to be processed. This file is mandatory.

 

Parameters - Principal Parameters

 

Interpolation window size

Window dimension used for the interpolation. In case all dummy pixels have to be replaced with valid values, the window size must be at least as big as the largest dummy area in the input data. If zero is entered, the interpolation is not applied.

 

Mean window size

Window dimension for the mean filtering. This filter is aimed at reducing the noise and smoothing pixel value variations within the specified window. If zero is entered, the mean filtering is not applied.

 

Relax Interpolation

By setting this flag the relax interpolation is carried out.

 

Parameters - Global

 

It brings to the general section of the Preferences parameters. Any modified value will be used and stored for further processing sessions.

 

Parameters - Other Parameters

 

It brings to the general section of the Preferences parameters. Any modified value will be used and stored for further processing sessions.

 

Output Files

 

Output file

Output file name of the interpolated/filtered data. This file is mandatory.

 

_rsp        

Interpolated/filtered data and associated header files (.sml, .hdr).

 

Details specific to the Units of Measure and Nomenclature of the output products can be found in the Data Format section.

 

General Functions

 

Exec

The processing step is executed.

 

Store Batch        

The processing step is stored in the batch list. The Batch Browser button allows to load the batch processing list.

 

Close        

The window will be closed.

 

Help

Specific help document section.

 

 

Specific Function(s)

 

None.

 

See Also

 

Task, SARscapeBatch object, SARscapeBatch script example

 

References

 

None.