pksieve

program to sieve filter raster image

SYNOPSIS

Usage: pksieve -i input [-s size] -o output

Options: [-c 4|8] [-b band] [-m mask] [-ot type] [-of format] [-co option]* [-ct table]

Description

The utility pksieve filters small objects (maximum size defined with the option -s) in a raster by replacing them to the largest neighbor object. In this context, objects are defined as pixels of the same value that are also connected. The connection can be defined in four directions (N-S and W-E: set option -c 4) or eight directions (N-S, W-E and diagonals NW-SE, NE-SW: set option -c 8).

Options

• use either -short or --long options (both --long=value and --long value are supported)
• short option -h shows basic options only, long option --help shows all options

  short	long	type	default	description
  i	input	std::string		Input image file
  s	size	int	0	raster polygons with sizes smaller than this will be merged into their largest neighbour. No sieve is performed if size = 0
  o	output	std::string		Output image file
  c	connect	int	8	the connectedness: 4 directions or 8 directions
  b	band	int	0	the band to be used from input file
  m	mask	std::string		Use the first band of the specified file as a validity mask (zero is invalid, non-zero is valid).
  ot	otype	std::string		Data type for output image ({Byte/Int16/UInt16/UInt32/Int32/Float32/Float64/CInt16/CInt32/CFloat32/CFloat64}). Empty string: inherit type from input image
  co	co	std::string		Creation option for output file. Multiple options can be specified.
  ct	ct	std::string		color table (file with 5 columns: id R G B ALFA (0: transparent, 255: solid)

  Usage: pksieve -i input [-s size] -o output

Examples

Some examples how to use pksieve can be found here