.sits_sgolay_coef

Computes the filter coefficients for all Savitzky-Golay
smoothing filters of order p for length n (odd). m can be used in order to
get directly the mth derivative. In this case, ts is a scaling factor.
The early rows of F smooth based on future values and later rows
smooth based on past values, with the middle row using half future
and half past. In particular, you can use row i to estimate x(k)
based on the i-1 preceding values and the n-i following values of x
values as y(k) = F(i,:) * x(k-i+1:k+n-i).

internal

An end-to-end toolkit for land use and land cover classification
using big Earth observation data, based on machine learning methods
applied to satellite image data cubes, as described in Simoes et al (2021) <doi:10.3390/rs13132428>.
Builds regular data cubes from collections in AWS, Microsoft Planetary Computer,
Brazil Data Cube, and Digital Earth Africa using the STAC protocol <https://stacspec.org/>
and the 'gdalcubes' R package <doi:10.3390/data4030092>.
Supports visualization methods for images and time series and
smoothing filters for dealing with noisy time series.
Includes functions for quality assessment of training samples using self-organized maps
as presented by Santos et al (2021) <doi:10.1016/j.isprsjprs.2021.04.014>.
Provides machine learning methods including support vector machines,
random forests, extreme gradient boosting, multi-layer perceptrons,
temporal convolutional neural networks <doi:10.3390/rs11050523>,
residual networks <arxiv:1809.04356>, and temporal attention encoders
<arXiv:2007.00586>.
Performs efficient classification of big Earth observation data cubes and includes
functions for post-classification smoothing based on Bayesian inference, and
methods for uncertainty assessment. Enables best
practices for estimating area and assessing accuracy of land change as
recommended by Olofsson et al(2014) <doi:10.1016/j.rse.2014.02.015>.
Minimum recommended requirements: 16 GB RAM and 4 CPU dual-core.

Gilberto Camara

sits

Satellite Image Time Series Analysis for Earth Observation Data
Cubes

Rolf Simoes

Felipe Souza

Lorena Santos

Pedro Andrade

Karine Ferreira

Alber Sanchez

Gilberto Queiroz

.sits_sgolay_coef function

<dl><dt>p</dt>
<dd>Filter order (integer).</dd>
<dt>n</dt>
<dd>Filter length (must be odd)</dd>
<dt>m</dt>
<dd>Derivative to calculate (default = 0)</dd>
<dt>ts</dt>
<dd>Time scaling (integer).</dd></dl>

Arguments

Savitzky-Golay smoothing filter coefficients — .sits_sgolay_coef

<dl>

<dt>p</dt>
<dd>Filter order (integer).</dd>


<dt>n</dt>
<dd>Filter length (must be odd)</dd>


<dt>m</dt>
<dd>Derivative to calculate (default = 0)</dd>


<dt>ts</dt>
<dd>Time scaling (integer).</dd>

</dl>

Savitzky-Golay smoothing filter coefficients

Get 50% off unlimited learning

.sits_sgolay_coef: Savitzky-Golay smoothing filter coefficients

Description

Usage

Value

Arguments