diff --git a/python/PBMotionAnalyzer/MAxyPlot.py b/python/PBMotionAnalyzer/MAxyPlot.py
index 4f24402..807a681 100644
--- a/python/PBMotionAnalyzer/MAxyPlot.py
+++ b/python/PBMotionAnalyzer/MAxyPlot.py
@@ -30,6 +30,26 @@ import pylab as plt #used for the colormaps
 #The source of the DraggableColorbar is from:
 #http://www.ster.kuleuven.be/~pieterd/python/html/plotting/interactive_colorbar.html
 
+class MouseData: #data structure for mouse events on image
+  usageStr='unknown mode. available m:move t: transform'
+  def __init__(self):
+    self.mode=None
+
+  def addTrfPt(self,p1):
+    try:
+      p0=self.btnPress
+      del self.btnPress
+    except AttributeError: return
+    try:
+      trf=self.trfPts
+    except AttributeError:
+      trf=self.trfPts=[]
+
+    p=p0+p1
+    print('add trf: {}'.format(p))
+    trf.append(p)
+
+
 class MPLCanvasImg(FigureCanvas):
   def __init__(self,parent,SetStatusCB=None):
     if SetStatusCB:
@@ -44,12 +64,12 @@ class MPLCanvasImg(FigureCanvas):
     self.mpl_connect('scroll_event', self.OnBtnScroll)
     self.mpl_connect('key_press_event',self.OnKeyPress)
     #self.mpl_connect('pick_event',self.OnPick) #works but locks the screed if debugging
-    self.fig=fig
     self.ax=ax
+    self.mouseData=MouseData()
 
   def InitChild(self,doc):
 
-    fig=self.fig
+    fig=self.figure
     ax=self.ax
     pts=doc.fh['pts']
     rec=doc.fh['rec']
@@ -80,6 +100,33 @@ class MPLCanvasImg(FigureCanvas):
     hl+=ax.plot(rec[idxTrigger,1],rec[idxTrigger,0],'rx',label='trig',markeredgewidth=1.,markersize=6.)
 
     #hl+=ax.plot(recPts[:,1],recPts[:,0],'g.',label='recDot')
+    fn=doc.fh.fid.name[:-4]+'.jpg'
+    try:
+      img=mpl.image.imread(fn)
+      try:
+        self.imgTrf=trf=doc.fh['imgTrf']
+      except KeyError:
+        mn=pts.min(0)
+        mx=pts.max(0)
+        ext=(mn[0], mx[0], mn[1], mx[1])
+        skew=None
+      else:
+        xmin=trf[0, 2]
+        ymin=trf[1, 2]
+        xmax=trf[0, :].sum()
+        ymax=trf[1, :].sum()
+        xskew=trf[0, 2]+trf[0, 0]
+        yskew=trf[1, 2]+trf[1, 0]
+        ext=(xmin, xmax, ymin, ymax)
+        skew=(xskew, yskew)
+
+      #interpolation must be none to allow skew image
+      himg=ax.imshow(img,extent=ext,interpolation='none')
+      himg._image_skew_coordinate=skew
+
+      pass
+    except IOError as e:
+      print(e)
     ax.xaxis.set_label_text('x-pos um')
     ax.yaxis.set_label_text('y-pos um')
     ax.axis('equal')
@@ -99,8 +146,26 @@ class MPLCanvasImg(FigureCanvas):
 
   def OnMotion(self,event):
     #print event,event.x,event.y,event.inaxes,event.xdata,event.ydata
-
     if event.inaxes==self.ax:
+      md=self.mouseData
+      if md.mode==2 and event.button==1 and self.toolbar.mode=='': # move
+        try:
+          himg=self.ax.get_images()[0]
+        except IndexError:
+          print('no image to transform')
+          return
+        trf=self.imgTrf
+        xOfs=event.xdata-md.btnPress[0]
+        yOfs=event.ydata-md.btnPress[1]
+        xmin=trf[0, 2]+xOfs
+        ymin=trf[1, 2]+yOfs
+        xmax=trf[0, :].sum()+xOfs
+        ymax=trf[1, :].sum()+yOfs
+        xskew=trf[0, 2]+trf[0, 0]+xOfs
+        yskew=trf[1, 2]+trf[1, 0]+yOfs
+        himg.set_extent((xmin, xmax, ymin, ymax))
+        himg._image_skew_coordinate=(xskew, yskew)
+        self.figure.canvas.draw()
 
       x=int(round(event.xdata))
       y=int(round(event.ydata))
@@ -108,8 +173,8 @@ class MPLCanvasImg(FigureCanvas):
       for h in self.ax.get_lines(): # to get also the ellipses: self.ax.get_children()
         c=h.contains(event)
         if c[0]:
-          #s = str(h)+str(c[1])
-          #print "over %s" % s
+          s = str(h)+str(c[1])
+          #print("over %s" % s)
           if type(h)==mpl.lines.Line2D:
             lbl=h.get_label()
             arr=h.get_data()
@@ -117,9 +182,7 @@ class MPLCanvasImg(FigureCanvas):
             s += '%s[%d] = [%.2f, %.2f]'%(lbl,idx,arr[0][idx],arr[1][idx])
           else:
             s += str(h)+str(c[1])
-
       self.SetStatusCB(self.Parent, 0, (x, y, s))
-
       #try:
       #  #v=self.img.get_array()[y,x]
       #  v=0;
@@ -142,14 +205,32 @@ class MPLCanvasImg(FigureCanvas):
 
   def OnBtnPress(self, event):
     """on button press we will see if the mouse is over us and store some data"""
-    #print(dir(event.guiEvent))
-    return
-    if event.inaxes == self.colBar.ax:
+    if self.toolbar.mode!='':
+      print(self.toolbar.mode)
+      return
+    if event.inaxes==self.ax:
+      md=self.mouseData
+      md.mode
+      if md.mode==1:#transform
+        if event.guiEvent.RightDown()==True:
+          self.doTransform()
+        if event.guiEvent.LeftDown()==True:
+          p=(event.xdata,event.ydata)
+          md.btnPress=p
+      elif md.mode==2:#move
+        if event.guiEvent.LeftDown()==True:
+          p=(event.xdata,event.ydata)
+          md.btnPress=p
+      else:
+        print(md.usageStr)
+
+          #print('self.btnPress1', p)
+    #if event.inaxes == self.colBar.ax:
       #if event.guiEvent.LeftDClick()==True:
       #    print dlg
-      pt=self.colBar.ax.bbox.get_points()[:,1]
-      nrm=self.colBar.norm
-      self.colBarPressed = (nrm.vmin,nrm.vmax,pt[0],pt[1],event.y)
+      #pt=self.colBar.ax.bbox.get_points()[:,1]
+      #nrm=self.colBar.norm
+      #self.colBarPressed = (nrm.vmin,nrm.vmax,pt[0],pt[1],event.y)
       #self.colBarPressed = event.x, event.y
       #print self.colBarPressed
       #self.OnMouse(event)
@@ -157,10 +238,19 @@ class MPLCanvasImg(FigureCanvas):
 
   def OnBtnRelease(self, event):
     """on release we reset the press data"""
-    #self.OnMouse(event)
+    print('OnBtnRelease')
+    md=self.mouseData
+    if md.mode==1:  #transform
+      p1=(event.xdata, event.ydata)
+      md.addTrfPt(p1)
+    elif md.mode==2:#move
+      trf=self.imgTrf
+      xOfs=event.xdata-md.btnPress[0]
+      yOfs=event.ydata-md.btnPress[1]
+      #trf[0,2]+=xOfs
+      #trf[1,2]+=yOfs
+      #trf[1,2]+=yOfs
     return
-    try: del self.colBarPressed
-    except AttributeError: pass
 
   def OnBtnScroll(self, event):
     return
@@ -183,20 +273,27 @@ class MPLCanvasImg(FigureCanvas):
       colBar.patch.figure.canvas.draw()
 
   def OnKeyPress(self, event):
+    #self.trfPts=[(-1831.2063808574276, 1349.6011964107677, -1966.6001994017945, 1433.3499501495512), (-1830.4810087443084, 917.64916303133487, -1958.3629895701151, 870.93212944552363), (-1561.5041487047886, 917.17727380319548, -1445.8912878106089, 873.29157558622114)]
+    #self.trfPts=[(-1960., 872., -1960., 872.), (-1450., 872, -1450., 872), (-1960., 1432.,-1960., 1432.)]
+    #self.trfPts=[(-1960., 872., -1760., 872.), (-1450., 872, -1250., 872), (-1960., 1432.,-1760., 1432.)]
+    #self.doTransform()
+    md=self.mouseData
+    if event.key=='t':
+      md.mode=1;print('transform image mode (drag drop to add point, right mopuse to execute)')
+    elif event.key=='x':
+      self.doTransform()
+    elif event.key=='m':
+      md.mode=2;print('move image mode')
+    elif event.key=='s':
+      self.saveTransform()
+    else:
+      try:
+        print('unknown mode. available m:move t: transform')
+        md.mode=None
+      except AttributeError:
+        pass
     return
-    colCycle=self.colCycle
-    colBar=self.colBar
-    if event.key=='down':
-      self.colIndex += 1
-    elif event.key=='up':
-      self.colIndex -= 1
-    self.colIndex%=len(colCycle)
-    cmap = colCycle[self.colIndex]
-    colBar.set_cmap(cmap)
-    colBar.draw_all()
-    self.img.set_cmap(cmap)
-    self.img.get_axes().set_title(cmap)
-    colBar.patch.figure.canvas.draw()
+
 
   def OnMouse(self, event):
     return
@@ -204,6 +301,84 @@ class MPLCanvasImg(FigureCanvas):
       if k[0]!='_':
         print(k,getattr(event,k))
 
+  def doTransform(self):
+    #print('doTransform')
+    try:
+      trfPts=self.mouseData.trfPts
+      del self.mouseData.trfPts
+    except AttributeError:
+      print('no transformation points')
+      return
+    print(trfPts)
+    trfPts=np.array(trfPts)
+
+    try:
+      himg=self.ax.get_images()[0]
+    except IndexError:
+      print('no image to transform')
+      return
+    xmin,xmax,ymin,ymax=himg.get_extent()
+    #himg.set_extent((xmin,xmax+10,ymin,ymax))
+    skew=himg._image_skew_coordinate
+    if skew is None:
+      xskew=xmax
+      yskew=ymin
+    else:
+      (xskew, yskew)=skew
+
+    trf0=np.array([[xskew-xmin,xmax-xskew,xmin],
+                  [yskew-ymin,ymax-yskew,ymin],
+                  [0,0,1]])
+
+
+    #calculate least square transformation matrix of the transformation points
+    n=trfPts.shape[0]
+    if n<3:
+      print('tot enough points (needs at least 3)')
+      return
+
+    M=np.mat(trf0).I
+    trfPtsImgI=M*np.vstack((trfPts[:,(0,1)].T,np.ones((1,n))))
+    trfPtsImgO=M*np.vstack((trfPts[:,(02,3)].T,np.ones((1,n))))
+    trfPtsImg=np.hstack((trfPtsImgI[0:2,:].T,trfPtsImgO[0:2,:].T))
+
+    A=np.zeros((n*2, 6))
+    A[0:n, (0, 1)]=trfPtsImg[:,(0,1)]
+    A[0:n, 2]=1
+    A[n:n*2, (3, 4)]=trfPtsImg[:,(0,1)]
+    A[n:n*2, 5]=1
+    A=np.mat(A)
+    B=trfPtsImg[:,(2,3)].T.reshape(-1, 1)
+
+    # (A'*A)^-1*A'*B
+    r=(A.T*A).I*A.T*B
+    trf1=np.hstack((r.T, [[0, 0, 1]])).reshape(3, -1)
+
+    trf=np.mat(trf0)*trf1
+    xmin=trf[0, 2]
+    ymin=trf[1, 2]
+    xmax=trf[0, :].sum()
+    ymax=trf[1, :].sum()
+    xskew=trf[0, 2]+trf[0, 0]
+    yskew=trf[1, 2]+trf[1, 0]
+    self.imgTrf=trf
+    print(trf)
+    himg.set_extent((xmin,xmax,ymin,ymax))
+    himg._image_skew_coordinate=(xskew, yskew)
+    self.figure.canvas.draw()
+
+  def saveTransform(self):
+    fhr=self.Parent.doc.fh
+    fn_npz=fhr.fid.name
+    fn_npzOrig=fn_npz+'.orig'
+    d=dict(fhr.items())
+    fhr.close()
+    if not os.path.exists(fn_npzOrig):
+      os.rename(fn_npz, fn_npzOrig)
+    d['imgTrf']=self.imgTrf
+    np.savez_compressed(fn_npz,**d)
+    self.Parent.doc.fh=np.load(fn_npz)
+
 class MAxyPlotFrame(wx.Frame):
   def __del__(self):
     self.doc.view.remove(self)
diff --git a/python/PBMotionAnalyzer/PBMotionAnalyzer.py b/python/PBMotionAnalyzer/PBMotionAnalyzer.py
index 102c04c..13dee84 100755
--- a/python/PBMotionAnalyzer/PBMotionAnalyzer.py
+++ b/python/PBMotionAnalyzer/PBMotionAnalyzer.py
@@ -374,10 +374,10 @@ if __name__ == '__main__':
 
       f1 = MAxyPlotFrame(frame, doc)
       f1.Show(True)
-      f2= MAErrorFrame(frame, doc)
-      f2.Show(True)
-      f3= MAVelocityFrame(frame, doc)
-      f3.Show(True)
+      #f2= MAErrorFrame(frame, doc)
+      #f2.Show(True)
+      #f3= MAVelocityFrame(frame, doc)
+      #f3.Show(True)
 
       self.SetTopWindow(frame)
       return True