qgis_fuzzifyrastersmallmembership: QGIS algorithm - Fuzzify raster (small membership)

In JanCaha/r_package_qgis: An extension of package "qgisprocess" providing direct R functions for QGIS functions

QGIS algorithm - Fuzzify raster (small membership)

Description

QGIS Algorithm provided by QGIS (native c++) Fuzzify raster (small membership) (native:fuzzifyrastersmallmembership). The Fuzzify raster (small membership) algorithm transforms an input raster to a fuzzified raster and thereby assigns values between 0 and 1 following the 'small' fuzzy membership function. The value of 0 implies no membership with the defined fuzzy set, a value of 1 depicts full membership. In between, the degree of membership of raster values follows the 'small' membership function. The 'small' function is constructed using two user-defined input raster values which set the point of half membership (midpoint, results to 0.5) and a predefined function spread which controls the function uptake. This function is typically used when smaller input raster values should become members of the fuzzy set more easily than higher values.

Usage

qgis_fuzzifyrastersmallmembership(
  INPUT = qgisprocess:::qgis_default_value(),
  BAND = qgisprocess:::qgis_default_value(),
  FUZZYMIDPOINT = qgisprocess:::qgis_default_value(),
  FUZZYSPREAD = qgisprocess:::qgis_default_value(),
  OUTPUT = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

INPUT	raster - Input Raster. Path to a raster layer.
BAND	band - Band Number. Integer value representing an existing raster band number.
FUZZYMIDPOINT	number - Function midpoint. A numeric 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.
FUZZYSPREAD	number - Function spread. A numeric 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.
OUTPUT	rasterDestination - Fuzzified raster. Path for new raster layer.
...	further parameters passed to qgisprocess::qgis_run_algorithm()
.complete_output	logical specifying if complete out of qgisprocess::qgis_run_algorithm() should be used (TRUE) or first output (most likely the main) should read (FALSE). Default value is TRUE.
.quiet	logical specifying if parameter .quiet for qgisprocess::qgis_run_algorithm() Default value is TRUE.
.messages	logical specifying if messages from qgisprocess::qgis_run_algorithm() should be printed (TRUE) or not (FALSE). Default value is FALSE.

Details

Outputs description

• CRS_AUTHID - outputString - CRS authority identifier

• EXTENT - outputString - Extent

• HEIGHT_IN_PIXELS - outputNumber - Height in pixels

• OUTPUT - outputRaster - Fuzzified raster

• TOTAL_PIXEL_COUNT - outputNumber - Total pixel count

• WIDTH_IN_PIXELS - outputNumber - Width in pixels

JanCaha/r_package_qgis documentation built on April 4, 2024, 8:10 p.m.