diff --git a/python/plugins/processing/algs/grass7/description/i.landsat.acca.txt b/python/plugins/processing/algs/grass7/description/i.landsat.acca.txt
new file mode 100644
index 00000000000..4b7e8f23bdb
--- /dev/null
+++ b/python/plugins/processing/algs/grass7/description/i.landsat.acca.txt
@@ -0,0 +1,14 @@
+i.landsat.acca
+Performs Landsat TM/ETM+ Automatic Cloud Cover Assessment (ACCA).
+Imagery (i.*)
+ParameterMultipleInput|rasters|Landsat input rasters|3|False
+ParameterNumber|b56composite|B56composite (step 6)|0|None|225|True
+ParameterNumber|b45ratio|B45ratio: Desert detection (step 10)|0|None|1|True
+ParameterNumber|histogram|Number of classes in the cloud temperature histogram|0|None|100|True
+*ParameterBoolean|-5|Data is Landsat-5 TM|False
+*ParameterBoolean|-f|Apply post-processing filter to remove small holes|False
+*ParameterBoolean|-x|Always use cloud signature (step 14)|False
+*ParameterBoolean|-2|Bypass second-pass processing, and merge warm (not ambiguous) and cold clouds|False
+*ParameterBoolean|-s|Include a category for cloud shadows|False
+OutputRaster|output|ACCA Raster
+
diff --git a/python/plugins/processing/algs/grass7/ext/i.py b/python/plugins/processing/algs/grass7/ext/i.py
index 3a7bb6f2be8..3b58250e8f7 100644
--- a/python/plugins/processing/algs/grass7/ext/i.py
+++ b/python/plugins/processing/algs/grass7/ext/i.py
@@ -51,7 +51,7 @@ def multipleOutputDir(alg, field, basename=None):
     alg.outputCommands.extend(commands)
 
 
-def orderedInput(alg, inputParameter, targetParameterDef):
+def orderedInput(alg, inputParameter, targetParameterDef, numSeq=None):
     """Inport multiple rasters in the order"""
     rasters = alg.getParameterValue(inputParameter).split(';')
     # TODO: make targetParameter
@@ -59,12 +59,16 @@ def orderedInput(alg, inputParameter, targetParameterDef):
     rootFilename = '{}_'.format(alg.getTempFilename())
     inputParameter.value = rootFilename
     alg.addParameter(inputParameter)
+    # Handle specific range
+    if numSeq is None:
+        numSeq = range(1, len(rasters) + 1)
+
     for idx in range(len(rasters)):
         layer = rasters[idx]
         if layer in alg.exportedLayers.keys():
             continue
         else:
-            destFilename = '{}{}'.format(rootFilename, idx + 1)
+            destFilename = '{}{}'.format(rootFilename, numSeq[idx])
             alg.setSessionProjectionFromLayer(layer, alg.commands)
             alg.exportedLayers[layer] = destFilename
             command = 'r.external input={} band=1 output={} --overwrite -o'.format(layer, destFilename)
diff --git a/python/plugins/processing/algs/grass7/ext/i_landsat_acca.py b/python/plugins/processing/algs/grass7/ext/i_landsat_acca.py
new file mode 100644
index 00000000000..cef94b077a0
--- /dev/null
+++ b/python/plugins/processing/algs/grass7/ext/i_landsat_acca.py
@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    i_landsat_acca.py
+    -----------------
+    Date                 : March 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__ = 'March 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 verifyRasterNum, orderedInput
+
+
+def checkParameterValuesBeforeExecuting(alg):
+    return verifyRasterNum(alg, 'rasters', 5, 5)
+
+
+def processInputs(alg):
+    orderedInput(alg, 'rasters',
+                 "ParameterString|input|Base name of input raster bands|None|False|False",
+                 [2, 3, 4, 5, 61])
+
+
+def processCommand(alg):
+    # Remove rasters parameter
+    rasters = alg.getParameterFromName('rasters')
+    alg.parameters.remove(rasters)
+
+    alg.processCommand()
+
+    # re-add rasters
+    alg.addParameter(rasters)
diff --git a/python/plugins/processing/algs/grass7/ext/i_landsat_toar.py b/python/plugins/processing/algs/grass7/ext/i_landsat_toar.py
index d084ebde5a5..4e360cd7e52 100644
--- a/python/plugins/processing/algs/grass7/ext/i_landsat_toar.py
+++ b/python/plugins/processing/algs/grass7/ext/i_landsat_toar.py
@@ -35,7 +35,8 @@ def checkParameterValuesBeforeExecuting(alg):
 
 def processInputs(alg):
     orderedInput(alg, 'rasters',
-                 "ParameterString|input|Base name of input raster bands|None|False|False")
+                 "ParameterString|input|Base name of input raster bands|None|False|False",
+                 [1, 2, 3, 4, 5, 61, 62, 7, 8])
 
 
 def processCommand(alg):
@@ -52,7 +53,6 @@ def processCommand(alg):
     param.value = '{}_'.format(alg.getTempFilename())
     alg.addParameter(param)
 
-    # Regroup rasters
     alg.processCommand()
 
     # re-add output