diff --git a/source/app/ViewArea.cpp b/source/app/ViewArea.cpp
index 6638ac9..1c2d190 100644
--- a/source/app/ViewArea.cpp
+++ b/source/app/ViewArea.cpp
@@ -113,7 +113,7 @@ Void ViewArea::zoomChangeEvent(Double factor, QPoint center )
 {
   Double zoomFactor;
   Double maxZoom = 100.0;
-  Double minZoom = ( 32.0 / m_pixmap.width() );
+  Double minZoom = 0.01;//( 1.0 / m_pixmap.width() );
 
   if( ( m_zoomFactor == minZoom ) && (factor < 1 ) )
     return;
diff --git a/source/app/plaYUVerApp.cpp b/source/app/plaYUVerApp.cpp
index 09ceea2..a94bf30 100644
--- a/source/app/plaYUVerApp.cpp
+++ b/source/app/plaYUVerApp.cpp
@@ -173,9 +173,11 @@ Void plaYUVerApp::loadFile( QString fileName )
     connect( interfaceChild->getViewArea(), SIGNAL( positionChanged(const QPoint &, PlaYUVerFrame *) ), this,
         SLOT( updatePixelValueStatusBar(const QPoint &, PlaYUVerFrame *) ) );
     connect( interfaceChild->getViewArea(), SIGNAL( selectionChanged( QRect ) ), this, SLOT( updatePropertiesSelectedArea( QRect ) ) );
+    connect( interfaceChild->getViewArea(), SIGNAL( zoomFactorChanged( double , QPoint ) ), this, SLOT( updateZoomFactorSBox() ) );
 
     interfaceChild->zoomToFit();
     interfaceChild->getViewArea()->setTool( m_appTool );
+    updateZoomFactorSBox( );
     statusBar()->showMessage( tr( "File loaded" ), 2000 );
   }
   else
@@ -388,6 +390,20 @@ Void plaYUVerApp::updatePropertiesSelectedArea( QRect area )
   }
 }
 
+
+Void plaYUVerApp::updateZoomFactorSBox( )
+{
+  if( m_pcCurrentSubWindow && m_pcCurrentSubWindow->getViewArea() )
+  {
+    Double factor = m_pcCurrentSubWindow->getViewArea()->getZoomFactor();
+    m_pcZoomFactorSBox->setValue(factor*100);
+  }
+  else
+  {
+    m_pcZoomFactorSBox->setValue(0.0);
+  }
+}
+
 // -----------------------  Playing Functions  --------------------
 
 UInt64 plaYUVerApp::getMaxFrameNumber()
@@ -706,6 +722,7 @@ Void plaYUVerApp::normalSize()
     {
       m_pcCurrentSubWindow->normalSize();
     }
+    updateZoomFactorSBox();
   }
 }
 
@@ -724,6 +741,7 @@ Void plaYUVerApp::zoomToFit()
     {
       m_pcCurrentSubWindow->zoomToFit();
     }
+    updateZoomFactorSBox();
   }
 }
 
@@ -737,7 +755,7 @@ Void plaYUVerApp::zoomToFitAll()
   }
 }
 
-Void plaYUVerApp::scaleFrame( Int ratio )
+Void plaYUVerApp::scaleFrame( int ratio )
 {
   if( m_pcCurrentSubWindow )
   {
@@ -752,6 +770,20 @@ Void plaYUVerApp::scaleFrame( Int ratio )
     {
       m_pcCurrentSubWindow->scaleViewByRatio( ( Double )( ratio ) / 100.0 );
     }
+    updateZoomFactorSBox();
+//    m_arrayActions[ZOOM_IN_ACT]->setEnabled( activeSubWindow()->getScaleFactor() < 3.0 );
+//    m_arrayActions[ZOOM_OUT_ACT]->setEnabled( activeSubWindow()->getScaleFactor() > 0.333 );
+  }
+}
+
+Void plaYUVerApp::setZoomFromSBox( double zoom )
+{
+  Double lastZoom;
+  if( activeSubWindow() )
+  {
+    lastZoom = activeSubWindow()->getViewArea()->getZoomFactor() * 100;
+    if( zoom / lastZoom != 1.0 )
+      activeSubWindow()->scaleViewByRatio( zoom / lastZoom );
   }
 }
 
@@ -767,6 +799,7 @@ Void plaYUVerApp::chageSubWindowSelection()
       updateTotalFrameNum();
       updateStreamProperties();
       updateFrameProperties();
+      updateZoomFactorSBox();
     }
     m_pcCurrentSubWindow = new_window;
   }
@@ -886,6 +919,7 @@ Void plaYUVerApp::updateMenus()
   m_arrayActions[ZOOM_OUT_ACT]->setEnabled( hasSubWindow );
   m_arrayActions[ZOOM_NORMAL_ACT]->setEnabled( hasSubWindow );
   m_arrayActions[ZOOM_FIT_ACT]->setEnabled( hasSubWindow );
+  m_pcZoomFactorSBox->setEnabled( hasSubWindow );
 
   m_arrayActions[PLAY_ACT]->setEnabled( hasSubWindow );
   m_arrayActions[PAUSE_ACT]->setEnabled( hasSubWindow );
@@ -1233,6 +1267,13 @@ Void plaYUVerApp::createToolBars()
   addToolBar( Qt::TopToolBarArea, m_arrayToolBars[FILE_TOOLBAR] );
 
   m_arrayToolBars[VIEW_TOOLBAR] = new QToolBar( tr( "View" ) );
+  m_pcZoomFactorSBox = new QDoubleSpinBox;
+  m_pcZoomFactorSBox->setRange(1.0, 10000.0);
+  m_pcZoomFactorSBox->setSingleStep(10.0);
+  m_pcZoomFactorSBox->setValue(100.0);
+  m_pcZoomFactorSBox->setSuffix("%");
+  connect(m_pcZoomFactorSBox, SIGNAL( valueChanged(double) ), this, SLOT( setZoomFromSBox(double) ) );
+  m_arrayToolBars[VIEW_TOOLBAR]->addWidget( m_pcZoomFactorSBox );
   m_arrayToolBars[VIEW_TOOLBAR]->addAction( m_arrayActions[ZOOM_IN_ACT] );
   m_arrayToolBars[VIEW_TOOLBAR]->addAction( m_arrayActions[ZOOM_OUT_ACT] );
   m_arrayToolBars[VIEW_TOOLBAR]->addAction( m_arrayActions[ZOOM_NORMAL_ACT] );
diff --git a/source/app/plaYUVerApp.h b/source/app/plaYUVerApp.h
index 7bfd1dd..a347cb9 100644
--- a/source/app/plaYUVerApp.h
+++ b/source/app/plaYUVerApp.h
@@ -82,7 +82,8 @@ private Q_SLOTS:
    * @param factor factor of scale. Ex: 120 scale the image up by 20% and
    *        80 scale the image down by 25%
    */
-  void scaleFrame( int ratio = 100 );
+  void scaleFrame( int ratio = 100.0 );
+  void setZoomFromSBox( double ratio );
 
   void normalSize();
   void zoomToFit();
@@ -104,6 +105,8 @@ private Q_SLOTS:
   void updateProperties();
   void updatePropertiesSelectedArea( QRect area );
 
+  void updateZoomFactorSBox();
+
   void setAllSubWindowTool();
   void setNavigationTool();
   void setSelectionTool();
@@ -150,6 +153,7 @@ private:
   QSlider *m_pcFrameSlider;
   QLabel *m_pcCurrFrameNumLabel;
   QLabel *m_pcTotalFrameNumLabel;
+  QDoubleSpinBox *m_pcZoomFactorSBox;
 
   QSignalMapper *mapperZoom;
   QSignalMapper *mapperSeekVideo;
diff --git a/source/lib/PlaYUVerFrame.h b/source/lib/PlaYUVerFrame.h
index 8c04c44..2d23d52 100644
--- a/source/lib/PlaYUVerFrame.h
+++ b/source/lib/PlaYUVerFrame.h
@@ -138,9 +138,10 @@ public:
 
   static Pixel ConvertPixel( Pixel, Int );
 
+#ifdef USE_OPENCV
   cv::Mat getCvMat();
   Void copyFrom( cv::Mat* );
-
+#endif
 
   UInt getWidth() const
   {