Spatial morphological Binary Propagation filter

Spatial morphological Binary Propagation filter.

Spatial morphological Binary Propagation filter performs multi-dimensional binary propagation with a given structuring element, spreading the influence of 1 pixels in a binary image to neighboring pixels based on a predefined connectivity criterion.

When applying this algorithm to continous image data, the input will be binarised.

Usage:

1. Start the algorithm from the Processing Toolbox panel.

2. Select the raster to process and modify the parameterization if necessary, then click run.

   

3. Processed image in comparison to the original.

   

Parameters

Raster layer [raster]

Raster layer to be processed band-wise.

Function [string]

Python code. See binary_closing, generate_binary_structure, iterate_structure for information on different parameters.

Default:

from scipy.ndimage.morphology import binary_propagation, generate_binary_structure, iterate_structure

structure = generate_binary_structure(rank=2, connectivity=1)
structure = iterate_structure(structure=structure, iterations=1)
function = lambda array: binary_propagation(array, structure=structure)

Outputs

Output raster layer [rasterDestination]

Raster file destination.

Command-line usage

>qgis_process help enmapbox:SpatialMorphologicalBinaryPropagationFilter:

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Arguments
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raster: Raster layer
    Argument type:  raster
    Acceptable values:
            - Path to a raster layer
function: Function
    Default value:  from scipy.ndimage.morphology import binary_propagation, generate_binary_structure, iterate_structure

structure = generate_binary_structure(rank=2, connectivity=1)
structure = iterate_structure(structure=structure, iterations=1)
function = lambda array: binary_propagation(array, structure=structure)

    Argument type:  string
    Acceptable values:
            - String value
            - field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field
            - expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression
outputRaster: Output raster layer
    Argument type:  rasterDestination
    Acceptable values:
            - Path for new raster layer

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Outputs
----------------

outputRaster: <outputRaster>
    Output raster layer