Use always_warn for low_contrast warnings

scikit-image · Mar 10, 2015 · 59184db · 59184db
1 parent 3ae65af
commit 59184db
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Showing 2 changed files with 14 additions and 12 deletions.
diff --git a/skimage/io/_io.py b/skimage/io/_io.py
@@ -8,7 +8,7 @@
 from ..color import rgb2grey
 from .util import file_or_url_context
 from ..exposure import is_low_contrast
-from .._shared._warnings import all_warnings
+from .._shared._warnings import always_warn
 
 
 __all__ = ['Image', 'imread', 'imread_collection', 'imsave', 'imshow', 'show']
@@ -156,7 +156,8 @@ def imsave(fname, arr, plugin=None, **plugin_args):
 
     """
     if is_low_contrast(arr):
-        warnings.warn('%s is a low contrast image' % fname)
+        with always_warn():
+            warnings.warn('%s is a low contrast image' % fname)
     return call_plugin('imsave', fname, arr, plugin=plugin, **plugin_args)
 
 

diff --git a/skimage/io/_plugins/matplotlib_plugin.py b/skimage/io/_plugins/matplotlib_plugin.py
@@ -4,7 +4,7 @@
 import matplotlib.pyplot as plt
 from ...util import dtype as dtypes
 from ...exposure import is_low_contrast
-from ..._shared._warnings import all_warnings
+from ..._shared._warnings import always_warn
 
 
 _default_colormap = 'gray'
@@ -67,15 +67,16 @@ def _raise_warnings(image_properties):
         The properties of the considered image.
     """
     ip = image_properties
-    if ip.unsupported_dtype:
-        warnings.warn("Non-standard image type; displaying image with "
-                      "stretched contrast.")
-    if ip.low_dynamic_range:
-        warnings.warn("Low image dynamic range; displaying image with "
-                      "stretched contrast.")
-    if ip.out_of_range_float:
-        warnings.warn("Float image out of standard range; displaying "
-                      "image with stretched contrast.")
+    with always_warn():
+        if ip.unsupported_dtype:
+            warnings.warn("Non-standard image type; displaying image with "
+                          "stretched contrast.")
+        if ip.low_dynamic_range:
+            warnings.warn("Low image dynamic range; displaying image with "
+                          "stretched contrast.")
+        if ip.out_of_range_float:
+            warnings.warn("Float image out of standard range; displaying "
+                          "image with stretched contrast.")
 
 
 def _get_display_range(image):