fixed aspect-ratio bug for photo guide

less/base_centerpanel.less

@@ -57,6 +57,7 @@
   left: 0;
   width: 78%;
   height: 100%;
+  text-align: center;
 }
 
 #mycanvas {
@@ -129,18 +130,22 @@
 
 #mycanvas {
   position: absolute;
+  left: 0px;
+  top: 0px;
 }
 #imgGuide {
   // z-index: -1000;
-  position: absolute;
+  // position: absolute;
   // -webkit-filter: contrast(400%);   
   //-webkit-filter: brightness(100%);
   // opacity: 50%;
   opacity: 0.4;
   filter: alpha(opacity=40);
   pointer-events:none;
+  
   max-width: 100%;
   max-height: 100%;
-  width: 100%;
+  height: auto;
+  margin-left: auto;
 }