diff --git a/src/meshlabplugins/filter_measure/filter_measure.cpp b/src/meshlabplugins/filter_measure/filter_measure.cpp
index ed78b6ab5..4cd091b79 100644
--- a/src/meshlabplugins/filter_measure/filter_measure.cpp
+++ b/src/meshlabplugins/filter_measure/filter_measure.cpp
@@ -31,6 +31,7 @@
 #include<vcg/complex/append.h>
 #include<vcg/simplex/face/pos.h>
 #include<vcg/complex/algorithms/bitquad_support.h>
+#include<vcg/complex/algorithms/mesh_to_matrix.h>
 #include<vcg/complex/algorithms/bitquad_optimization.h>
 #include "filter_measure.h"
 
@@ -242,27 +243,29 @@ bool FilterMeasurePlugin::applyFilter( const QString& filterName,MeshDocument& m
     if((filterName == "Per Vertex Quality Histogram") || (filterName == "Per Face Quality Histogram") )
         {
             CMeshO &m=md.mm()->cm;
+            tri::Allocator<CMeshO>::CompactEveryVector(m);
             float RangeMin = env.evalFloat("HistMin");
             float RangeMax = env.evalFloat("HistMax");
             int binNum     = env.evalInt("binNum");
+            bool areaFlag  = env.evalBool("areaWeighted");
 
             Histogramf H;
             H.SetRange(RangeMin,RangeMax,binNum);
             if(filterName == "Per Vertex Quality Histogram")
             {
-                for(CMeshO::VertexIterator vi = m.vert.begin(); vi != m.vert.end(); ++vi)
-                    if(!(*vi).IsD())
-                    {
-                        assert(!math::IsNAN((*vi).Q()) && "You should never try to compute Histogram with Invalid Floating points numbers (NaN)");
-                        H.Add((*vi).Q());
-                    }
+              vector<Scalarm> aVec(m.vn,1.0);
+              if(areaFlag)
+                tri::MeshToMatrix<CMeshO>::PerVertexArea(m,aVec);
+
+              for(size_t i=0;i<m.vn;++i)
+                H.Add(m.vert[i].Q(), aVec[i]);
             }else{
-                for(CMeshO::FaceIterator fi = m.face.begin(); fi != m.face.end(); ++fi)
-                    if(!(*fi).IsD())
-                    {
-                        assert(!math::IsNAN((*fi).Q()) && "You should never try to compute Histogram with Invalid Floating points numbers (NaN)");
-                        H.Add((*fi).Q());
-                    }
+              vector<Scalarm> aVec(m.fn,1.0);
+              if(areaFlag)
+                tri::MeshToMatrix<CMeshO>::PerFaceArea(m,aVec);
+
+              for(size_t i=0;i<m.fn;++i)
+                H.Add(m.face[i].Q(),aVec[i]);
             }
             Log("(         -inf..%15.7f) : %4.0f",RangeMin,H.BinCountInd(0));
             for(int i=1;i<=binNum;++i)
diff --git a/src/meshlabplugins/filter_measure/filter_measure.xml b/src/meshlabplugins/filter_measure/filter_measure.xml
index d4eaa105e..97f23838d 100644
--- a/src/meshlabplugins/filter_measure/filter_measure.xml
+++ b/src/meshlabplugins/filter_measure/filter_measure.xml
@@ -1,56 +1,63 @@
 <MESHLAB_FILTER_INTERFACE mfiVersion="2.0">
-	<PLUGIN pluginName="FilterMeasure" pluginAuthor="Guido Ranzuglia" pluginEmail="guido.ranzuglia@isti.cnr.it">
-	<FILTER filterName="Compute Topological Measures" filterFunction="computeTopoMeasure" filterClass="Measure" filterPre="MM_NONE" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
-		<FILTER_HELP><![CDATA[Compute a set of topological measures over a mesh.]]></FILTER_HELP>
-		<FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
-	</FILTER>
-	<FILTER filterName="Compute Topological Measures for Quad Meshes" filterFunction="computeTopoMeasureQuad" filterClass="Measure" filterPre="MM_NONE" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
-		<FILTER_HELP><![CDATA[Compute a set of geometric measures over a mesh.]]></FILTER_HELP>
-		<FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
-	</FILTER>
-	<FILTER filterName="Compute Geometric Measures" filterFunction="computeGeomMeasure" filterClass="Measure" filterPre="MM_NONE" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
-		<FILTER_HELP><![CDATA[Compute a set of geometric measures over a mesh.It computes: bounding box volume and diagonal, surface area, thin shell barycenter, and an Inertia Matrix.Open the layer dialog to see the results.]]></FILTER_HELP>
-		<FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
-	</FILTER>
-	<FILTER filterName="Per Vertex Quality Stat" filterFunction="computeVertQualityStat" filterClass="Measure" filterPre="MM_VERTQUALITY" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
-		<FILTER_HELP><![CDATA[Compute some aggregate statistics over the per vertex quality, like Min, Max, Average, StdDev and Variance.]]></FILTER_HELP>
-		<FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
-	</FILTER>
-	<FILTER filterName="Per Face Quality Stat" filterFunction="computeFaceQualityStat" filterClass="Measure" filterPre="MM_FACEQUALITY" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
-		<FILTER_HELP><![CDATA[Compute some aggregate statistics over the per vertex quality, like Min, Max, Average, StdDev and Variance.]]></FILTER_HELP>
-		<FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
-	</FILTER>
-	<FILTER filterName="Per Vertex Quality Histogram" filterFunction="computeVertQualityHistogram" filterClass="Measure" filterPre="MM_VERTQUALITY" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
-		<FILTER_HELP><![CDATA[Compute an histogram of the values of the per-vertex quality.]]></FILTER_HELP>
-		<FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
-		<PARAM parType="Real" parName="HistMin" parDefault="meshDoc.current().computeMinVQ()" parIsImportant="true">
-			<PARAM_HELP><![CDATA[The vertex are displaced of a vector whose norm is bounded by this value]]></PARAM_HELP>
-			<EDIT_GUI guiLabel="Hist Min" />
-		</PARAM>
-		<PARAM parType="Real" parName="HistMax" parDefault="meshDoc.current().computeMaxVQ()" parIsImportant="true">
-			<PARAM_HELP><![CDATA[The vertex are displaced of a vector whose norm is bounded by this value]]></PARAM_HELP>
-			<EDIT_GUI guiLabel="Hist Max" />
-		</PARAM>
-		<PARAM parType="Int" parName="binNum" parDefault="20" parIsImportant="false">
-			<PARAM_HELP><![CDATA[The number of bins of the histogram. E.g. the number of intervals in which the min..max range is subdivided into.]]></PARAM_HELP>
-			<EDIT_GUI guiLabel="Bin number" />
-		</PARAM>
-	</FILTER>
-	<FILTER filterName="Per Face Quality Histogram" filterFunction="computeFaceQualityHistogram" filterClass="Measure" filterPre="MM_FACEQUALITY" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
-	<FILTER_HELP><![CDATA[Compute an histogram of the values of the per-vertex quality.]]></FILTER_HELP>
-	<FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
-	<PARAM parType="Real" parName="HistMin" parDefault="meshDoc.current().computeMinFQ()" parIsImportant="true">
-		<PARAM_HELP><![CDATA[The vertex are displaced of a vector whose norm is bounded by this value]]></PARAM_HELP>
-		<EDIT_GUI guiLabel="Hist Min" />
-	</PARAM>
-	<PARAM parType="Real" parName="HistMax" parDefault="meshDoc.current().computeMaxFQ()" parIsImportant="true">
-		<PARAM_HELP><![CDATA[The vertex are displaced of a vector whose norm is bounded by this value]]></PARAM_HELP>
-		<EDIT_GUI guiLabel="Hist Max" />
-	</PARAM>
-	<PARAM parType="Int" parName="binNum" parDefault="20" parIsImportant="true">
-		<PARAM_HELP><![CDATA[The number of bins of the histogram. E.g. the number of intervals in which the min..max range is subdivided into.]]></PARAM_HELP>
-		<EDIT_GUI guiLabel="Bin number" />
-	</PARAM>
-	</FILTER>
-	</PLUGIN>
+  <PLUGIN pluginName="FilterMeasure" pluginAuthor="Guido Ranzuglia" pluginEmail="guido.ranzuglia@isti.cnr.it">
+  <FILTER filterName="Compute Topological Measures" filterFunction="computeTopoMeasure" filterClass="Measure" filterPre="MM_NONE" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
+    <FILTER_HELP><![CDATA[Compute a set of topological measures over a mesh.]]></FILTER_HELP>
+    <FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
+  </FILTER>
+  <FILTER filterName="Compute Topological Measures for Quad Meshes" filterFunction="computeTopoMeasureQuad" filterClass="Measure" filterPre="MM_NONE" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
+    <FILTER_HELP><![CDATA[Compute a set of geometric measures over a mesh.]]></FILTER_HELP>
+    <FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
+  </FILTER>
+  <FILTER filterName="Compute Geometric Measures" filterFunction="computeGeomMeasure" filterClass="Measure" filterPre="MM_NONE" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
+    <FILTER_HELP><![CDATA[Compute a set of geometric measures over a mesh.It computes: bounding box volume and diagonal, surface area, thin shell barycenter, and an Inertia Matrix.Open the layer dialog to see the results.]]></FILTER_HELP>
+    <FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
+  </FILTER>
+  <FILTER filterName="Per Vertex Quality Stat" filterFunction="computeVertQualityStat" filterClass="Measure" filterPre="MM_VERTQUALITY" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
+    <FILTER_HELP><![CDATA[Compute some aggregate statistics over the per vertex quality, like Min, Max, Average, StdDev and Variance.]]></FILTER_HELP>
+    <FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
+  </FILTER>
+  <FILTER filterName="Per Face Quality Stat" filterFunction="computeFaceQualityStat" filterClass="Measure" filterPre="MM_FACEQUALITY" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
+    <FILTER_HELP><![CDATA[Compute some aggregate statistics over the per vertex quality, like Min, Max, Average, StdDev and Variance.]]></FILTER_HELP>
+    <FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
+  </FILTER>
+  <FILTER filterName="Per Vertex Quality Histogram" filterFunction="computeVertQualityHistogram" filterClass="Measure" filterPre="MM_VERTQUALITY" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
+    <FILTER_HELP><![CDATA[Compute an histogram of the values of the per-vertex quality. It can be useful to evaluate the distribution of the quality value over the surface. It can be discrete (e.g. based on vertex count or area weighted).]]></FILTER_HELP>
+    <FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
+    <PARAM parType="Real" parName="HistMin" parDefault="meshDoc.current().computeMinVQ()" parIsImportant="true">
+      <PARAM_HELP><![CDATA[The vertex are displaced of a vector whose norm is bounded by this value]]></PARAM_HELP>
+      <EDIT_GUI guiLabel="Hist Min" />
+    </PARAM>
+    <PARAM parType="Real" parName="HistMax" parDefault="meshDoc.current().computeMaxVQ()" parIsImportant="true">
+      <PARAM_HELP><![CDATA[The vertex are displaced of a vector whose norm is bounded by this value]]></PARAM_HELP>
+      <EDIT_GUI guiLabel="Hist Max" />
+    </PARAM>
+    <PARAM parName="areaWeighted" parIsImportant="true" parType="Boolean" parDefault="false">
+     <PARAM_HELP><![CDATA[If false, the histogram will report the number of vertices with quality values
+     falling in each bin of the histogram. If true each bin of the histogram will report the approximate area
+     of the mesh with that range of values. Area is computed by assigning to each vertex one third of the area
+     all the incident triangles.]]></PARAM_HELP>
+     <CHECKBOX_GUI guiLabel="Area Weighted"/>
+    </PARAM><PARAM parType="Int" parName="binNum" parDefault="20" parIsImportant="false">
+      <PARAM_HELP><![CDATA[The number of bins of the histogram. E.g. the number of intervals in which the min..max range is subdivided into.]]></PARAM_HELP>
+      <EDIT_GUI guiLabel="Bin number" />
+    </PARAM>
+
+  </FILTER>
+  <FILTER filterName="Per Face Quality Histogram" filterFunction="computeFaceQualityHistogram" filterClass="Measure" filterPre="MM_FACEQUALITY" filterPost="MM_NONE" filterArity="SingleMesh" filterRasterArity="NoRaster" filterIsInterruptible="false">
+  <FILTER_HELP><![CDATA[Compute an histogram of the values of the per-vertex quality.]]></FILTER_HELP>
+  <FILTER_JSCODE><![CDATA[]]></FILTER_JSCODE>
+  <PARAM parType="Real" parName="HistMin" parDefault="meshDoc.current().computeMinFQ()" parIsImportant="true">
+    <PARAM_HELP><![CDATA[The vertex are displaced of a vector whose norm is bounded by this value]]></PARAM_HELP>
+    <EDIT_GUI guiLabel="Hist Min" />
+  </PARAM>
+  <PARAM parType="Real" parName="HistMax" parDefault="meshDoc.current().computeMaxFQ()" parIsImportant="true">
+    <PARAM_HELP><![CDATA[The vertex are displaced of a vector whose norm is bounded by this value]]></PARAM_HELP>
+    <EDIT_GUI guiLabel="Hist Max" />
+  </PARAM>
+  <PARAM parType="Int" parName="binNum" parDefault="20" parIsImportant="true">
+    <PARAM_HELP><![CDATA[The number of bins of the histogram. E.g. the number of intervals in which the min..max range is subdivided into.]]></PARAM_HELP>
+    <EDIT_GUI guiLabel="Bin number" />
+  </PARAM>
+  </FILTER>
+  </PLUGIN>
 </MESHLAB_FILTER_INTERFACE>