uavRst (version 0.5-4)

otbtex_gray: Calculates Gray scale morphological operations for a given kernel size.

Description

Calculates Gray scale morphological operations for a given kernel size. return list of geotiffs containing thelocal statistics for each channel

Usage

otbtex_gray(
  input = NULL,
  out = "morpho",
  ram = "8192",
  filter = "dilate",
  structype = "ball",
  xradius = 5,
  yradius = 5,
  channel = NULL,
  retRaster = FALSE,
  outDir = NULL,
  verbose = FALSE,
  otbLinks = NULL
)

Arguments

input

of GeoTiff containing 1 ore more gray value bands

out

the output mono band image containing the edge features

ram

reserved memory in MB

filter

the choice of the morphological operation (dilate/erode/opening/closing) (default value is dilate)

structype

the choice of the structuring element type (ball/cross)

xradius

x the ball structuring element X Radius (only if structype==ball)

yradius

y the ball structuring element Y Radius (only if structype==ball)

channel

sequence of bands to be processed

retRaster

boolean if TRUE a raster stack is returned

outDir

output Directory

verbose

switch for system messages default is FALSE

otbLinks

list. of GI tools cli pathes

Value

raster* object

Examples

# NOT RUN {
# load libraries
require(uavRst)
require(link2GI)
require(listviewer)

setwd(tempdir())

# check if OTB exists
otbLinks <- link2GI::linkOTB()

if (otbLinks$exist) {
data("rgb")
raster::plotRGB(rgb)
fn<-file.path(tempdir(),"rgb.tif")
raster::writeRaster(rgb, 
                    filename=fn,
                    format="GTiff", 
                    overwrite=TRUE)
# get help
cmd<-link2GI::parseOTBFunction(algo = "GrayScaleMorphologicalOperation",gili=otbLinks)
listviewer::jsonedit(cmd$help)

r<-otbtex_gray(input="pacman.tif",retRaster = TRUE,otbLinks=otbLinks)

##- visualize all layers
raster::plot(r[[1]])
}
# }