wbt_sobel_filter

Performs a Sobel edge-detection filter on an image.

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_sobel_filter function

<dl><dt>input</dt>
<dd>Input raster file.</dd>
<dt>output</dt>
<dd>Output raster file.</dd>
<dt>variant</dt>
<dd>Optional variant value. Options include 3x3 and 5x5 (default is 3x3).</dd>
<dt>clip</dt>
<dd>Optional amount to clip the distribution tails by, in percent (default is 0.0).</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

Sobel filter — wbt_sobel_filter

<dl>

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


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


<dt>variant</dt>
<dd>Optional variant value. Options include 3x3 and 5x5 (default is 3x3).</dd>


<dt>clip</dt>
<dd>Optional amount to clip the distribution tails by, in percent (default is 0.0).</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_sobel_filter: Sobel filter

Description

Usage

Value

Arguments