diff --git a/src/r3-api-ar.js b/src/r3-api-ar.js
index fff6176..98c03d3 100644
--- a/src/r3-api-ar.js
+++ b/src/r3-api-ar.js
@@ -40,12 +40,12 @@ R3.API.AR = function(
     this.video = video;
 
     if (R3.Utils.UndefinedOrNull(pathCamera)) {
-        pathCamera = 'Data/camera_para.dat';
+        pathCamera = 'data/camera_para.dat';
     }
     this.pathCamera = pathCamera;
 
     if (R3.Utils.UndefinedOrNull(pathMarker)) {
-        pathMarker = 'Data/patt.hiro';
+        pathMarker = 'data/patt.hiro';
     }
     this.pathMarker = pathMarker;
 
diff --git a/src/r3-ar.js b/src/r3-ar.js
index 4cc4c98..47684d9 100644
--- a/src/r3-ar.js
+++ b/src/r3-ar.js
@@ -186,7 +186,10 @@ R3.AR.prototype.createInstance = function() {
                 this.arToolkitContext = new THREEx.ArToolkitContext(
                     {
                         cameraParametersUrl: this.pathCamera,
-                        detectionMode: 'mono'
+                        detectionMode: 'mono',
+                        maxDetectionRate: 30,
+                        canvasWidth: 80*3,
+                        canvasHeight: 60*3
                     }
                 );
 
@@ -349,11 +352,11 @@ R3.AR.prototype.resize = function() {
 
         this.arToolkitSource.onResizeElement();
 
-        // if (this.arToolkitContext.arController !== null){
-        //     this.arToolkitSource.copyElementSizeTo(
-        //         this.arToolkitContext.arController.canvas
-        //     )
-        // }
+        if (this.arToolkitContext.arController !== null){
+            this.arToolkitSource.copyElementSizeTo(
+                this.arToolkitContext.arController.canvas
+            )
+        }
 
     }