Eyes priority is replaced with Eyes and mouth priority,

Helps to fix eye problems during training like "alien eyes" and wrong eyes direction.
Also makes the detail of the teeth higher.

New default values with new model:
Archi : ‘liae-ud’
AdaBelief : enabled

facelib/LandmarksProcessor.py

@@ -433,7 +433,28 @@ def get_image_eye_mask (image_shape, image_landmarks):
 
     return hull_mask
 
+def get_image_mouth_mask (image_shape, image_landmarks):
+    if len(image_landmarks) != 68:
+        raise Exception('get_image_eye_mask works only with 68 landmarks')
 
+    h,w,c = image_shape
+
+    hull_mask = np.zeros( (h,w,1),dtype=np.float32)
+
+    image_landmarks = image_landmarks.astype(np.int)
+
+    cv2.fillConvexPoly( hull_mask, cv2.convexHull( image_landmarks[60:]), (1,) )
+
+    dilate = h // 32
+    hull_mask = cv2.dilate(hull_mask, cv2.getStructuringElement(cv2.MORPH_ELLIPSE,(dilate,dilate)), iterations = 1 )
+
+    blur = h // 16
+    blur = blur + (1-blur % 2)
+    hull_mask = cv2.GaussianBlur(hull_mask, (blur, blur) , 0)
+    hull_mask = hull_mask[...,None]
+
+    return hull_mask
+    
 def alpha_to_color (img_alpha, color):
     if len(img_alpha.shape) == 2:
         img_alpha = img_alpha[...,None]