optimize: fix handling of [/FlateDecode none] - type images

Closes #1271
ocrmypdf · Apr 7, 2024 · b4db1b7 · b4db1b7
1 parent 7a8cc21
commit b4db1b7
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/ocrmypdf/optimize.py b/src/ocrmypdf/optimize.py
@@ -89,6 +89,7 @@ def extract_image_filter(
         if (
             len(pim.filter_decodeparms) == 2
             and first_filtdp[0] == Name.FlateDecode
+            and first_filtdp[1] is not None
             and first_filtdp[1].get(Name.Predictor, 1) == 1
             and second_filtdp[0] == Name.DCTDecode
             and not second_filtdp[1]