grass_r_blend_rgb: QGIS algorithm - r.blend.rgb

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

QGIS algorithm - r.blend.rgb

Description

QGIS Algorithm provided by GRASS r.blend.rgb (grass:r.blend.rgb). r.blend.rgb - Blends color components of two raster maps by a given ratio and exports into three rasters.

Usage

grass_r_blend_rgb(
  first = qgisprocess:::qgis_default_value(),
  second = qgisprocess:::qgis_default_value(),
  percent = qgisprocess:::qgis_default_value(),
  output_red = qgisprocess:::qgis_default_value(),
  output_green = qgisprocess:::qgis_default_value(),
  output_blue = qgisprocess:::qgis_default_value(),
  GRASS_REGION_PARAMETER = qgisprocess:::qgis_default_value(),
  GRASS_REGION_CELLSIZE_PARAMETER = qgisprocess:::qgis_default_value(),
  GRASS_RASTER_FORMAT_OPT = qgisprocess:::qgis_default_value(),
  GRASS_RASTER_FORMAT_META = qgisprocess:::qgis_default_value(),
  ...,
  .complete_output = .complete_output_option(),
  .quiet = .quiet_option(),
  .messages = .message_option()
)

Arguments

first	raster - Name of first raster map for blending. Path to a raster layer.
second	raster - Name of second raster map for blending. Path to a raster layer.
percent	number - Percentage weight of first map for color blending. 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_red	rasterDestination - Blended Red. Path for new raster layer.
output_green	rasterDestination - Blended Green. Path for new raster layer.
output_blue	rasterDestination - Blended Blue. Path for new raster layer.
GRASS_REGION_PARAMETER	extent - GRASS GIS region extent. A comma delimited string of x min, x max, y min, y max. E.g. '4,10,101,105'. Path to a layer. The extent of the layer is used..
GRASS_REGION_CELLSIZE_PARAMETER	number - GRASS GIS region cellsize (leave 0 for default). 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.
GRASS_RASTER_FORMAT_OPT	string - Output Rasters format options (createopt). String 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.
GRASS_RASTER_FORMAT_META	string - Output Rasters format metadata options (metaopt). String 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.
...	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

• output_blue - outputRaster - Blended Blue

• output_green - outputRaster - Blended Green

• output_red - outputRaster - Blended Red

JanCaha/r_package_qgis documentation built on Nov. 3, 2024, 5:25 p.m.