Increase hamming_distance_threshold

Signed-off-by: Jono Yang <[email protected]>

Author: JonoYang

matchcode/models.py

@@ -269,6 +269,7 @@ def match(cls, fingerprint, resource=None, exact_match=False):
 
         # Step 2: calculate Hamming distance of all matches
 
+        hamming_distance_threshold = 10
         # Store all close matches in a dictionary of querysets
         matches_by_hamming_distance = defaultdict(cls.objects.none)
         for match in matches:
@@ -281,7 +282,8 @@ def match(cls, fingerprint, resource=None, exact_match=False):
             hd = byte_hamming_distance(bah128, match_bah128)
 
             # TODO: try other thresholds if this is too restrictive
-            if hd < 8:
+            # TODO: rank matches instead of having threshold
+            if hd < hamming_distance_threshold:
                 # Save match to `matches_by_hamming_distance` by adding the matched object
                 # to the queryset
                 matches_by_hamming_distance[hd] |= cls.objects.filter(pk=match.pk)