internal_utils

.call

.expand

.set_dim

.polygonize

.rast_tmpl

.modify_list

Lightweight wrappers for calling into the C++ backend plus helper utilities
reused throughout the package.

internal

Implements the Simple Non-Iterative Clustering algorithm for
superpixel segmentation of multi-band images, as introduced by Achanta
and Susstrunk (2017) <doi:10.1109/CVPR.2017.520>. Supports both standard
image arrays and geospatial raster objects, with a design that can be
extended to other spatial data frameworks. The algorithm groups adjacent
pixels into compact, coherent regions based on spectral similarity and
spatial proximity. A high-performance implementation supports images
with arbitrary spectral bands.

Rolf Simoes

snic

Superpixel Segmentation with the Simple Non-Iterative Clustering
Algorithm

Felipe Souza

Felipe Carlos

Gilberto Camara

internal_utils function

<ul>
<li><code>.call(fn_name, ...)</code> Executes the registered C++ symbol via
 <code>.Call</code> and wraps errors with friendly messages.</li>
<li><code>.expand(...)</code> A thin wrapper around <code><a href="/link/expand.grid()?package=snic&version=0.6.1" data-mini-rdoc="snic::expand.grid()">expand.grid()</a></code> that
 drops row attributes and prevents factor coercion.</li>
<li><code>.set_dim(x, dim)</code> Re-shapes <code>x</code> by delegating to the
 <code>snic_set_dim</code> native routine.</li>
<li><code>.polygonize(x)</code> Converts a segmentation raster into polygons.</li>
<li><code>.rast_tmpl(x)</code> Builds an empty <code><a href="/link/terra%3A%3Arast()?package=snic&version=0.6.1" data-mini-rdoc="snic::terra::rast()">terra::rast()</a></code> template
 matching the array's footprint.</li>
<li><code>.modify_list(x, y)</code> Modifies x list using named entries from y</li>
</ul>

Functions

Internal utilities for native calls and helpers — internal_utils

<ul>
<li><code>.call(fn_name, ...)</code> Executes the registered C++ symbol via
 <code>.Call</code> and wraps errors with friendly messages.</li>
<li><code>.expand(...)</code> A thin wrapper around <code><a href='https://rdrr.io/r/base/expand.grid.html'>expand.grid()</a></code> that
 drops row attributes and prevents factor coercion.</li>
<li><code>.set_dim(x, dim)</code> Re-shapes <code>x</code> by delegating to the
 <code>snic_set_dim</code> native routine.</li>
<li><code>.polygonize(x)</code> Converts a segmentation raster into polygons.</li>
<li><code>.rast_tmpl(x)</code> Builds an empty <code><a href='https://rdrr.io/pkg/terra/man/rast.html'>terra::rast()</a></code> template
 matching the array's footprint.</li>
<li><code>.modify_list(x, y)</code> Modifies x list using named entries from y</li>
</ul>

Internal utilities for native calls and helpers

internal_utils: Internal utilities for native calls and helpers

Description

Usage

Arguments

Functions