wbt_unsharp_masking

An image sharpening technique that enhances edges.

ImageProcessingToolsFilters

An R frontend for the 'WhiteboxTools' library, which is an advanced geospatial data analysis platform developed by Prof. John Lindsay at the University of Guelph's Geomorphometry and Hydrogeomatics Research Group. 'WhiteboxTools' can be used to perform common geographical information systems (GIS) analysis operations, such as cost-distance analysis, distance buffering, and raster reclassification. Remote sensing and image processing tasks include image enhancement (e.g. panchromatic sharpening, contrast adjustments), image mosaicing, numerous filtering operations, simple classification (k-means), and common image transformations. 'WhiteboxTools' also contains advanced tooling for spatial hydrological analysis (e.g. flow-accumulation, watershed delineation, stream network analysis, sink removal), terrain analysis (e.g. common terrain indices such as slope, curvatures, wetness index, hillshading; hypsometric analysis; multi-scale topographic position analysis), and LiDAR data processing. Suggested citation: Lindsay (2016) <doi:10.1016/j.cageo.2016.07.003>.

Andrew Brown

whitebox

'WhiteboxTools' R Frontend

Qiusheng Wu

wbt_unsharp_masking function

<dl><dt>input</dt>
<dd>Input raster file.</dd>
<dt>output</dt>
<dd>Output raster file.</dd>
<dt>sigma</dt>
<dd>Standard deviation distance in pixels.</dd>
<dt>amount</dt>
<dd>A percentage and controls the magnitude of each overshoot.</dd>
<dt>threshold</dt>
<dd>Controls the minimal brightness change that will be sharpened.</dd>
<dt>wd</dt>
<dd>Changes the working directory.</dd>
<dt>verbose_mode</dt>
<dd>Sets verbose mode. If verbose mode is <code>FALSE</code>, tools will not print output messages.</dd>
<dt>compress_rasters</dt>
<dd>Sets the flag used by 'WhiteboxTools' to determine whether to use compression for output rasters.</dd>
<dt>command_only</dt>
<dd>Return command that would be executed by <code><a href="/link/system()?package=whitebox&version=2.3.1" data-mini-rdoc="whitebox::system()">system()</a></code> rather than running tool.</dd></dl>

Arguments

Unsharp masking — wbt_unsharp_masking

<dl>

<dt>input</dt>
<dd>Input raster file.</dd>


<dt>output</dt>
<dd>Output raster file.</dd>


<dt>sigma</dt>
<dd>Standard deviation distance in pixels.</dd>


<dt>amount</dt>
<dd>A percentage and controls the magnitude of each overshoot.</dd>


<dt>threshold</dt>
<dd>Controls the minimal brightness change that will be sharpened.</dd>


<dt>wd</dt>
<dd>Changes the working directory.</dd>


<dt>verbose_mode</dt>
<dd>Sets verbose mode. If verbose mode is <code>FALSE</code>, tools will not print output messages.</dd>


<dt>compress_rasters</dt>
<dd>Sets the flag used by 'WhiteboxTools' to determine whether to use compression for output rasters.</dd>


<dt>command_only</dt>
<dd>Return command that would be executed by <code><a href='https://rdrr.io/r/base/system.html'>system()</a></code> rather than running tool.</dd>

</dl>

wbt_unsharp_masking: Unsharp masking

Description

Usage

Value

Arguments