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# -*- coding: utf-8 -*-
"""
***************************************************************************
sieve.py
---------------------
Date : August 2012
Copyright : (C) 2012 by Victor Olaya
Email : volayaf at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.parameters.ParameterRaster import ParameterRaster
from processing.parameters.ParameterSelection import ParameterSelection
from processing.parameters.ParameterNumber import ParameterNumber
from processing.outputs.OutputRaster import OutputRaster
from processing.tools.system import *
from processing.algs.gdal.GdalUtils import GdalUtils
class sieve(GdalAlgorithm):
INPUT = 'INPUT'
THRESHOLD = 'THRESHOLD'
CONNECTIONS = 'CONNECTIONS'
OUTPUT = 'OUTPUT'
PIXEL_CONNECTIONS = ['4', '8']
def defineCharacteristics(self):
self.name = 'Sieve'
self.group = '[GDAL] Analysis'
self.addParameter(ParameterRaster(self.INPUT, 'Input layer', False))
self.addParameter(ParameterNumber(self.THRESHOLD, 'Threshold', 0,
9999, 2))
self.addParameter(ParameterSelection(self.CONNECTIONS,
'Pixel connection', self.PIXEL_CONNECTIONS, 0))
self.addOutput(OutputRaster(self.OUTPUT, 'Output layer'))
def processAlgorithm(self, progress):
output = self.getOutputValue(self.OUTPUT)
arguments = []
arguments.append('-st')
arguments.append(str(self.getParameterValue(self.THRESHOLD)))
arguments.append('-' +
self.PIXEL_CONNECTIONS[self.getParameterValue(
self.CONNECTIONS)])
arguments.append('-of')
arguments.append(GdalUtils.getFormatShortNameFromFilename(output))
arguments.append(self.getParameterValue(self.INPUT))
arguments.append(output)
commands = []
if isWindows():
commands = ['cmd.exe', '/C ', 'gdal_sieve.bat',
GdalUtils.escapeAndJoin(arguments)]
else:
commands = ['gdal_sieve.py', GdalUtils.escapeAndJoin(arguments)]
GdalUtils.runGdal(commands, progress)
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