diff --git a/python/plugins/processing/algs/lidar/fusion/CanopyModel.py b/python/plugins/processing/algs/lidar/fusion/CanopyModel.py
index 4e8d9374ed81..9b0a95735c5a 100644
--- a/python/plugins/processing/algs/lidar/fusion/CanopyModel.py
+++ b/python/plugins/processing/algs/lidar/fusion/CanopyModel.py
@@ -28,6 +28,7 @@
 __revision__ = '$Format:%H$'
 
 import os
+from processing.core.parameters import ParameterBoolean
 from processing.core.parameters import ParameterFile
 from processing.core.parameters import ParameterNumber
 from processing.core.parameters import ParameterSelection
@@ -65,7 +66,7 @@ def defineCharacteristics(self):
         self.addParameter(ParameterSelection(
             self.ZUNITS, self.tr('Z Units'), self.UNITS))
         self.addOutput(OutputFile(
-            self.OUTPUT_DTM, self.tr('DTM Output Surface'), 'dtm'))
+            self.OUTPUT_DTM, self.tr('.dtm output surface'), 'dtm'))
         ground = ParameterFile(
             self.GROUND, self.tr('Input ground DTM layer'), False, True)
         ground.isAdvanced = True
diff --git a/python/plugins/processing/algs/lidar/fusion/FilterData.py b/python/plugins/processing/algs/lidar/fusion/FilterData.py
index 26d7210d6174..f6fbc9929d5d 100644
--- a/python/plugins/processing/algs/lidar/fusion/FilterData.py
+++ b/python/plugins/processing/algs/lidar/fusion/FilterData.py
@@ -26,7 +26,6 @@
 __revision__ = '$Format:%H$'
 
 import os
-import subprocess
 from processing.core.parameters import ParameterFile
 from processing.core.parameters import ParameterNumber
 from processing.core.outputs import OutputFile
@@ -50,7 +49,7 @@ def defineCharacteristics(self):
         self.addParameter(ParameterNumber(
             self.VALUE, self.tr('Standard Deviation multiplier')))
         self.addParameter(ParameterNumber(
-            self.VALUE, self.tr('Window size'), None, None, 10))
+            self.WINDOWSIZE, self.tr('Window size'), None, None, 10))
         self.addOutput(OutputFile(
             self.OUTPUT, self.tr('Output filtered LAS file')))
         self.addAdvancedModifiers()
@@ -59,10 +58,10 @@ def processAlgorithm(self, progress):
         commands = [os.path.join(FusionUtils.FusionPath(), 'FilterData.exe')]
         commands.append('/verbose')
         self.addAdvancedModifiersToCommand(commands)
-        commands.append('outlier')
+        commands.append('/outlier')
         commands.append(unicode(self.getParameterValue(self.VALUE)))
         commands.append(unicode(self.getParameterValue(self.WINDOWSIZE)))
-        outFile = self.getOutputValue(self.OUTPUT) + '.lda'
+        outFile = self.getOutputValue(self.OUTPUT)
         commands.append(outFile)
         files = self.getParameterValue(self.INPUT).split(';')
         if len(files) == 1:
@@ -71,8 +70,3 @@ def processAlgorithm(self, progress):
             FusionUtils.createFileList(files)
             commands.append(FusionUtils.tempFileListFilepath())
         FusionUtils.runFusion(commands, progress)
-        commands = [os.path.join(FusionUtils.FusionPath(), 'LDA2LAS.exe')]
-        commands.append(outFile)
-        commands.append(self.getOutputValue(self.OUTPUT))
-        p = subprocess.Popen(commands, shell=True)
-        p.wait()