Update flask

@@ -29,9 +29,8 @@ function activate()
 function detect_face()
 {
 	let classifier = new cv.CascadeClassifier();
-	let imgElement = document.getElementById('imagefile');
 	classifier.load('haarcascade_frontalface_default.xml');
-	let src = cv.imread(imgElement);
+	let src = cv.imread('imagefile');
 	let dst = new cv.Mat(video.height, video.width, cv.CV_8UC4);
 	let gray = new cv.Mat();
 	src.copyTo(dst);
@@ -93,9 +92,9 @@ var loadFile = function(event) {
     reader.readAsDataURL(event.target.files[0]);
     reader.onload = function() {
 		var output = document.getElementById('imagefile');
-		output.src = URL.createObjectURL(event.target.files[0]);
+		output.src = reader.result;
 		detect_face();
-    }
+    };
   };
 
 let tempCanvas = document.createElement("canvas");