title: "The constructor Mat(Mat, Rect) is undefined " error in opencv android 2.4.8
body: <p>i want to crop image in android but following error occur ..do u peoples have any idea why?</p>
  
  <pre><code>    Bitmap oimage=ImgProc_Obj.readImageFromEM();
      //myimageviewer.setImageBitmap(oimage);
      Mat morignal=new Mat();
      Utils.bitmapToMat(oimage, morignal);
      Rect myR=new Rect(20 ,20,300,300);//here is error"The constructor Mat(Mat, Rect) is undefined"
      Mat croped=new Mat(morignal,myR);
      Mat test=new Mat(); 
  </code></pre>
  
  <p>thanks in advance ..</p>