adds commit statement with approve button and good parameter settings for is box filled

zesje/api/solutions.py

@@ -186,4 +186,6 @@ class Approve(Resource):
             solution.graded_at = datetime.now()
             solution.graded_by = grader
 
+        db.session.commit()
+
         return {'state': graded}

zesje/pregrader.py

@@ -32,7 +32,7 @@ def add_feedback_to_solution(sub, exam, page, page_img):
                 db.session.commit()
 
 
-def box_is_filled(box, page_img, threshold=235, cut_padding=0.05, box_size=9):
+def box_is_filled(box, page_img, threshold=225, cut_padding=0.05, box_size=9):
     """
     A function that finds the checkbox in a general area and then checks if it is filled in.
 
@@ -68,7 +68,7 @@ def box_is_filled(box, page_img, threshold=235, cut_padding=0.05, box_size=9):
     # convert to grayscale
     gray_im = cv2.cvtColor(cut_im, cv2.COLOR_BGR2GRAY)
     # apply threshold to only have black or white
-    _, bin_im = cv2.threshold(gray_im, 160, 255, cv2.THRESH_BINARY)
+    _, bin_im = cv2.threshold(gray_im, 150, 255, cv2.THRESH_BINARY)
 
     h_bin, w_bin, *_ = bin_im.shape
     # create a mask that gets applied when floodfill the white