diff --git a/ti/static/ti/cv.js b/ti/static/ti/cv.js
index c01989cc978d06385fe6bd301bd9f0032dcd3425..432419c054cfb9b6aea3dcfa4fa8e67638399dc3 100644
--- a/ti/static/ti/cv.js
+++ b/ti/static/ti/cv.js
@@ -87,7 +87,8 @@
   }
 
   function getPosition(event){
-      var x = event.x;
-      var y = event.y;
+      var bound = canvas.getBoundingClientRect();
+      var x = (event.pageX - bound.left) * (canvas.width / bound.width);
+      var y = (event.pageY - bound.top) * (canvas.height / bound.height);
       return {X: x, Y: y};
   }