testing/compare: Remove "retry ignoring pixels with differences of only 1."

mgiuca-google · mgiuca-google · commit 23b03aa682ae · 2013-02-27T11:49:02.000+11:00
This was introduced in 1283feb, presumably to hack around the fact that 1-pixel differences can make a very large error value. This is not necessary any more, since the root cause has been fixed."
diff --git a/lib/matplotlib/testing/compare.py b/lib/matplotlib/testing/compare.py
@@ -319,21 +319,6 @@ def compare_images( expected, actual, tol, in_decorator=False ):
          os.unlink(diff_image)
       return None
 
-   # For Agg-rendered images, we can retry by ignoring pixels with
-   # differences of only 1
-   if extension == 'png':
-       # Remove differences of only 1
-       diffImage = np.abs(np.asarray(actualImage, dtype=np.int) -
-                          np.asarray(expectedImage, dtype=np.int))
-       actualImage = np.where(diffImage <= 1, expectedImage, actualImage)
-
-       rms = calculate_rms(expectedImage, actualImage)
-
-       if ( (rms / 10000.0) <= tol ):
-           if os.path.exists(diff_image):
-               os.unlink(diff_image)
-           return None
-
    save_diff_image( expected, actual, diff_image )
 
    if in_decorator:
