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"""
***************************************************************************
pansharp.py
---------------------
Date : March 2019
Copyright : (C) 2019 by Alexander Bruy
Email : alexander dot bruy 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__ = "Alexander Bruy"
__date__ = "March 2019"
__copyright__ = "(C) 2019, Alexander Bruy"
import os
from qgis.core import (
QgsRasterFileWriter,
QgsProcessingException,
QgsProcessingParameterDefinition,
QgsProcessingParameterRasterLayer,
QgsProcessingParameterEnum,
QgsProcessingParameterString,
QgsProcessingParameterRasterDestination,
)
from processing.algs.gdal.GdalAlgorithm import GdalAlgorithm
from processing.algs.gdal.GdalUtils import GdalUtils
from processing.tools.system import isWindows
pluginPath = os.path.split(os.path.split(os.path.dirname(__file__))[0])[0]
class pansharp(GdalAlgorithm):
SPECTRAL = "SPECTRAL"
PANCHROMATIC = "PANCHROMATIC"
RESAMPLING = "RESAMPLING"
OPTIONS = "OPTIONS"
EXTRA = "EXTRA"
OUTPUT = "OUTPUT"
def __init__(self):
super().__init__()
def initAlgorithm(self, config=None):
self.methods = (
(self.tr("Nearest Neighbour"), "nearest"),
(self.tr("Bilinear (2x2 Kernel)"), "bilinear"),
(self.tr("Cubic (4x4 Kernel)"), "cubic"),
(self.tr("Cubic B-Spline (4x4 Kernel)"), "cubicspline"),
(self.tr("Lanczos (6x6 Kernel)"), "lanczos"),
(self.tr("Average"), "average"),
)
self.addParameter(
QgsProcessingParameterRasterLayer(
self.SPECTRAL, self.tr("Spectral dataset")
)
)
self.addParameter(
QgsProcessingParameterRasterLayer(
self.PANCHROMATIC, self.tr("Panchromatic dataset")
)
)
resampling_param = QgsProcessingParameterEnum(
self.RESAMPLING,
self.tr("Resampling algorithm"),
options=[i[0] for i in self.methods],
defaultValue=2,
)
resampling_param.setFlags(
resampling_param.flags()
| QgsProcessingParameterDefinition.Flag.FlagAdvanced
)
self.addParameter(resampling_param)
options_param = QgsProcessingParameterString(
self.OPTIONS,
self.tr("Additional creation options"),
defaultValue="",
optional=True,
)
options_param.setFlags(
options_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
)
options_param.setMetadata({"widget_wrapper": {"widget_type": "rasteroptions"}})
self.addParameter(options_param)
extra_param = QgsProcessingParameterString(
self.EXTRA,
self.tr("Additional command-line parameters"),
defaultValue=None,
optional=True,
)
extra_param.setFlags(
extra_param.flags() | QgsProcessingParameterDefinition.Flag.FlagAdvanced
)
self.addParameter(extra_param)
self.addParameter(
QgsProcessingParameterRasterDestination(self.OUTPUT, self.tr("Output"))
)
def name(self):
return "pansharp"
def displayName(self):
return self.tr("Pansharpening")
def group(self):
return self.tr("Raster miscellaneous")
def groupId(self):
return "rastermiscellaneous"
def commandName(self):
return "gdal_pansharpen"
def getConsoleCommands(self, parameters, context, feedback, executing=True):
spectral = self.parameterAsRasterLayer(parameters, self.SPECTRAL, context)
if spectral is None:
raise QgsProcessingException(
self.invalidRasterError(parameters, self.SPECTRAL)
)
spectral_input_details = GdalUtils.gdal_connection_details_from_layer(spectral)
panchromatic = self.parameterAsRasterLayer(
parameters, self.PANCHROMATIC, context
)
if panchromatic is None:
raise QgsProcessingException(
self.invalidRasterError(parameters, self.PANCHROMATIC)
)
panchromatic_input_details = GdalUtils.gdal_connection_details_from_layer(
panchromatic
)
out = self.parameterAsOutputLayer(parameters, self.OUTPUT, context)
self.setOutputValue(self.OUTPUT, out)
output_format = QgsRasterFileWriter.driverForExtension(os.path.splitext(out)[1])
if not output_format:
raise QgsProcessingException(self.tr("Output format is invalid"))
arguments = [
panchromatic_input_details.connection_string,
spectral_input_details.connection_string,
out,
"-r",
self.methods[self.parameterAsEnum(parameters, self.RESAMPLING, context)][1],
"-of",
output_format,
]
if panchromatic_input_details.credential_options:
arguments.extend(
panchromatic_input_details.credential_options_as_arguments()
)
options = self.parameterAsString(parameters, self.OPTIONS, context)
if options:
arguments.extend(GdalUtils.parseCreationOptions(options))
if self.EXTRA in parameters and parameters[self.EXTRA] not in (None, ""):
extra = self.parameterAsString(parameters, self.EXTRA, context)
arguments.append(extra)
return [
self.commandName() + (".bat" if isWindows() else ".py"),
GdalUtils.escapeAndJoin(arguments),
]
|
