Add image standardization

@@ -28,6 +28,9 @@ app = Flask(__name__)
 sess = tf.compat.v1.Session()
 
 
+def image_standardization(image):
+    return (image - 127.5) / 128.0
+
 def resize(image):
     resized = cv2.resize(image, (image_size, image_size), interpolation=cv2.INTER_AREA)
     return resized
@@ -80,6 +83,7 @@ def register():
     image_np = np.frombuffer(image, dtype=np.uint8)
     image_np = cv2.imdecode(image_np, cv2.IMREAD_UNCHANGED)
     image_np = cv2.cvtColor(image_np, cv2.COLOR_BGR2RGB)
+    image_np = image_standardization(image_np)
     image_np = prewhiten(image_np)
     image_np = resize(image_np)
     image_np = image_np.reshape(-1, image_size, image_size, 3)
@@ -127,7 +131,7 @@ def verify():
         if (distance < dist_min):
             verified_id = row_data['student_id']
             dist_min = distance
-            new_embedding = db_embedding * 0.97 + embedding * 0.03
+            new_embedding = db_embedding * 0.99 + embedding * 0.01
             new_embedding = new_embedding.tobytes()
             sql = "UPDATE student_embedding SET embedding=_binary %s WHERE student_id = %s"
             cursor.execute(sql, (new_embedding, verified_id))

 [verification_server]
 model=models/20200816-080621
-threshold=0.78
+threshold=0.685
 image_size=160

-python3 -m flask run --host 0.0.0.0 --port 443 --cert=cert.pem --key=key.pem
+python3 -m flask run --host 0.0.0.0 --port 443 --no-debugger --no-reload --cert=cert.pem --key=key.pem

@@ -257,13 +257,13 @@ and is wrapped around the whole page content, except for the footer in this exam
                 <canvas id="canvasOutput">/canvas>
             </div>
             <div id="inputForm">
-                <strong>얼굴 이미지는 서버에 저장되지 않습니다</strong><br>
-                <strong>(복원 불가능한 512차원 벡터로 변환됩니다)</strong><br>
+                <strong>얼굴 이미지는 '절대로' 저장되지 않습니다</strong><br>
                 <strong>학번과 이름은 임의로 입력해주세요</strong><br>
                 <strong>예)1234/홍길동 등</strong><br>
                 학번: <input type="text" id="student_id"><br>
                 이름: <input type="text" id="student_name"><br>
-                <input id="sender" type="button" onclick="submit()" value="등록" disabled>
+		<input id="sender" type="button" onclick="submit()" value="등록" disabled><br>
+		등록 후: <a href="https://gabibing.com">출석체크 페이지</a>
             </div>
         </div>
     </div>