Merge pull request #20568 from meeseeksmachine/auto-backport-of-pr-20565-on-v3.4.x

jklymak · web-flow · commit 56269d8ca4f3 · 2021-07-03T08:28:47.000-07:00
Backport PR #20565 on branch v3.4.x (FIX: PILLOW asarray bug)
diff --git a/lib/matplotlib/image.py b/lib/matplotlib/image.py
@@ -1661,7 +1661,7 @@ def _pil_png_to_float_array(pil_png):
     mode = pil_png.mode
     rawmode = pil_png.png.im_rawmode
     if rawmode == "1":  # Grayscale.
-        return np.asarray(pil_png, np.float32)
+        return np.asarray(pil_png).astype(np.float32)
     if rawmode == "L;2":  # Grayscale.
         return np.divide(pil_png, 2**2 - 1, dtype=np.float32)
     if rawmode == "L;4":  # Grayscale.
