Add i.rectify algorithm

Author: Médéric Ribreux

python/plugins/processing/algs/grass7/description/i.rectify.txt

@@ -0,0 +1,14 @@
+i.rectify
+Rectifies an image by computing a coordinate transformation for each pixel in the image based on the control points. 
+Imagery (i.*)
+ParameterMultipleInput|rasters|Name of raster maps to rectify|3|False
+ParameterFile|gcp|Ground Control Points file|False|False
+ParameterSelection|order|Rectification polynomial order|1;2;3|0
+ParameterString|resolution|Target resolution|None|False|True
+ParameterNumber|memory|Amount of memory to use in MB|1|None|300|True
+ParameterSelection|method|Interpolation method to use|nearest;linear;cubic;lanczos;linear_f;cubic_f;lanczos_f|0
+ParameterCrs|crs|Destination CRS|None|False
+Hardcoded|extension=rectified
+*ParameterBoolean|-t|Use thin plate spline|False
+OutputDirectory|output|Output Directory
+

python/plugins/processing/algs/grass7/ext/i_rectify.py

@@ -0,0 +1,102 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    i_rectify.py
+    ------------
+    Date                 : April 2016
+    Copyright            : (C) 2016 by Médéric Ribreux
+    Email                : medspx at medspx dot fr
+***************************************************************************
+*                                                                         *
+*   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__ = 'Médéric Ribreux'
+__date__ = 'April 2016'
+__copyright__ = '(C) 2016, Médéric Ribreux'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+from i import regroupRasters, copyFile, multipleOutputDir
+from qgis.core import QgsMessageLog
+from qgis.core import QgsCoordinateReferenceSystem
+from ..Grass7Utils import Grass7Utils
+from processing.core.parameters import getParameterFromString
+from os import path
+
+
+def processCommand(alg):
+    # Creates a new location with the CRS
+    crsParam = alg.getParameterFromName('crs')
+    crsId = int(crsParam.value[5:])
+    #QgsMessageLog.logMessage('crs = {}'.format(crs), 'DEBUG', QgsMessageLog.INFO)
+    crs = QgsCoordinateReferenceSystem()
+    crs.createFromId(crsId, QgsCoordinateReferenceSystem.EpsgCrsId)
+    command = "g.proj proj4=\"{}\" location=TARGET".format(crs.toProj4())
+    alg.commands.append(command)
+    alg.parameters.remove(crsParam)
+
+    # Regroup rasters
+    rasters = alg.getParameterFromName('rasters')
+    rastersList = rasters.value.split(';')
+    alg.parameters.remove(rasters)
+
+    # Insert a i.group command
+    group = getParameterFromString("ParameterString|group|group of rasters|None|False|False")
+    group.value = alg.getTempFilename()
+    alg.addParameter(group)
+
+    command = 'i.group group={} input={}'.format(
+        group.value,
+        ','.join([alg.exportedLayers[f] for f in rastersList])
+    )
+    alg.commands.append(command)
+
+    # Handle POINT File
+    gcp = alg.getParameterFromName('gcp')
+    extFileName = gcp.value
+    destPath = path.join(Grass7Utils.grassMapsetFolder(),
+                         'PERMANENT',
+                         'group', group.value,
+                         'POINTS')
+    copyFile(alg, extFileName, destPath)
+    alg.parameters.remove(gcp)
+
+    # Add a target destination for our group
+    command = "i.target group={} location=TARGET mapset=PERMANENT".format(group.value)
+    alg.commands.append(command)
+
+    # remove output
+    output = alg.getOutputFromName('output')
+    alg.removeOutputFromName('output')
+
+    # Add an extension
+    #extension = getParameterFromString("ParameterString|extension|Output raster map(s) suffix|None|False|False")
+    #extension.value = "rectified"
+    #alg.addParameter(extension)
+
+    # modify parameters values
+    alg.processCommand()
+
+    # Re-add input rasters
+    alg.addParameter(rasters)
+    alg.addParameter(gcp)
+    alg.addParameter(crs)
+
+    # Re-add output
+    alg.addOutput(output)
+
+
+def processOutputs(alg):
+    # We need to export from the TARGET location
+    command = "g.mapset location=TARGET mapset=PERMANENT"
+    alg.commands.append(command)
+    multipleOutputDir(alg, 'output')