Merge pull request #6034 from radarhere/imageops

python-pillow · Mar 30, 2022 · 4bc6483 · 4bc6483
2 parents a6efaa1 + ecb64fe
commit 4bc6483
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diff --git a/Tests/test_imageops.py b/Tests/test_imageops.py
@@ -63,6 +63,7 @@ def test_sanity():
     ImageOps.grayscale(hopper("L"))
     ImageOps.grayscale(hopper("RGB"))
 
+    ImageOps.invert(hopper("1"))
     ImageOps.invert(hopper("L"))
     ImageOps.invert(hopper("RGB"))
 

diff --git a/src/PIL/ImageOps.py b/src/PIL/ImageOps.py
@@ -525,7 +525,7 @@ def invert(image):
     lut = []
     for i in range(256):
         lut.append(255 - i)
-    return _lut(image, lut)
+    return image.point(lut) if image.mode == "1" else _lut(image, lut)
 
 
 def mirror(image):