Update app.py

app.py

@@ -114,6 +114,8 @@ def non_maximum_supression(outputs, min_confidence):
     """
     Function to apply non-maximum suppression.
     """
+    if min_confidence is None:
+        min_confidence = 0.5
     boxes = outputs[0][0]
     confidences = boxes[4]
     max_confidence_index = np.argmax(confidences)