diff --git a/cvcomposer.pro b/cvcomposer.pro
index 8fac246..666de07 100644
--- a/cvcomposer.pro
+++ b/cvcomposer.pro
@@ -85,7 +85,8 @@ SOURCES += main.cpp\
     plugwidget/dataviewerwidget.cpp \
     processor/viewer/dataviewerprocessor.cpp \
     processor/viewer/imageviewerprocessor.cpp \
-    plugwidget/imageviewerwidget.cpp
+    plugwidget/imageviewerwidget.cpp \
+    processor/math/countnonzeroprocessor.cpp
 
 HEADERS  += gui/mainwidget.h \
     gui/composerwidget.h \
@@ -152,7 +153,8 @@ HEADERS  += gui/mainwidget.h \
     plugwidget/dataviewerwidget.h \
     processor/viewer/dataviewerprocessor.h \
     processor/viewer/imageviewerprocessor.h \
-    plugwidget/imageviewerwidget.h
+    plugwidget/imageviewerwidget.h \
+    processor/math/countnonzeroprocessor.h
 
 FORMS    += \
     gui/mainwidget.ui \
diff --git a/gui/plugitem.cpp b/gui/plugitem.cpp
index 00848ce..382b2e5 100644
--- a/gui/plugitem.cpp
+++ b/gui/plugitem.cpp
@@ -60,6 +60,9 @@ PlugItem::PlugItem(Plug *plug, QGraphicsItem *parent) :
         case PlugType::Rectangle:
             brush = QColor(142, 68, 173);
             break;
+        case PlugType::Double:
+            brush = QColor(230, 126, 34);
+            break;
         default:
             brush = Qt::white;
             break;
diff --git a/plugwidget/dataviewerwidget.cpp b/plugwidget/dataviewerwidget.cpp
index 1f47e67..57b506c 100644
--- a/plugwidget/dataviewerwidget.cpp
+++ b/plugwidget/dataviewerwidget.cpp
@@ -51,6 +51,10 @@ void DataViewerWidget::onNodeProcessed(const Properties &inputs, const Propertie
         _text = _text.arg(rect.width);
         _text = _text.arg(rect.height);
     }
+    else if(output.type() == QVariant::Int)
+    {
+        _text = QString::number(output.toInt());
+    }
     #warning TBD display kernel
 
     update();
diff --git a/processor/math/countnonzeroprocessor.cpp b/processor/math/countnonzeroprocessor.cpp
new file mode 100644
index 0000000..9a8877c
--- /dev/null
+++ b/processor/math/countnonzeroprocessor.cpp
@@ -0,0 +1,36 @@
+// Copyright 2016 Erwan MATHIEU <wawanbreton@gmail.com>
+//
+// This file is part of CvComposer.
+//
+// CvComposer 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 3 of the License, or
+// (at your option) any later version.
+//
+// CvComposer is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with CvComposer.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "countnonzeroprocessor.h"
+
+#include "global/cvutils.h"
+
+
+CountNonZeroProcessor::CountNonZeroProcessor()
+{
+    addInput("image", PlugType::Image);
+
+    addOutput("count", PlugType::Double);
+}
+
+Properties CountNonZeroProcessor::processImpl(const Properties &inputs)
+{
+    Properties outputs;
+    outputs.insert("count", cv::countNonZero(inputs["image"].value<cv::Mat>()));
+    return outputs;
+}
+
diff --git a/processor/math/countnonzeroprocessor.h b/processor/math/countnonzeroprocessor.h
new file mode 100644
index 0000000..1be0d5d
--- /dev/null
+++ b/processor/math/countnonzeroprocessor.h
@@ -0,0 +1,30 @@
+// Copyright 2016 Erwan MATHIEU <wawanbreton@gmail.com>
+//
+// This file is part of CvComposer.
+//
+// CvComposer 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 3 of the License, or
+// (at your option) any later version.
+//
+// CvComposer is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with CvComposer.  If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include "processor/abstractprocessor.h"
+
+class CountNonZeroProcessor : public AbstractProcessor
+{
+    public:
+        CountNonZeroProcessor();
+
+    protected:
+        virtual Properties processImpl(const Properties &inputs) override;
+};
+
diff --git a/processor/processorsfactory.cpp b/processor/processorsfactory.cpp
index b61602b..687dbe5 100644
--- a/processor/processorsfactory.cpp
+++ b/processor/processorsfactory.cpp
@@ -36,6 +36,7 @@
 #include "processor/geometry/makeborderprocessor.h"
 #include "processor/input/cameraprocessor.h"
 #include "processor/input/imagefromfileprocessor.h"
+#include "processor/math/countnonzeroprocessor.h"
 #include "processor/shape/drawcircleprocessor.h"
 #include "processor/shape/drawellipseprocessor.h"
 #include "processor/shape/drawlineprocessor.h"
@@ -68,6 +69,10 @@ QList<QPair<QString, QStringList> > ProcessorsFactory::getProcessors()
     data << "Kernel";
     processors << QPair<QString, QStringList>("Data", data);
 
+    QStringList math;
+    math << "CountNonZero";
+    processors << QPair<QString, QStringList>("Math", math);
+
     QStringList shapes;
     shapes << "Rectangle" << "DrawRectangle" << "DrawCircle" << "DrawEllipse" << "DrawLine"
            << "DrawText";
@@ -218,6 +223,10 @@ AbstractProcessor *ProcessorsFactory::createProcessor(const QString &rawProcesso
     {
         return new LaplacianProcessor();
     }
+    else if(rawProcessorName == "CountNonZero")
+    {
+        return new CountNonZeroProcessor();
+    }
     else
     {
         qCritical() << "Unknown processor type" << rawProcessorName;