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Update docs for img_as_ubyte

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The line in `img_as_ubyte` needs correction; ubyte cannot hold negative data. From a quick experiment it seems like both `img_as_uint` and `img_as_ubyte` clip negative values (and not shift them to the positive domain).
This commit is contained in:
Almar Klein
2014-11-21 22:36:04 +01:00
parent 7c66797054
commit 9bccefbc5e
1 changed files with 2 additions and 3 deletions
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skimage/util/dtype.py
+2 -3
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@@ -304,7 +304,7 @@ def img_as_uint(image, force_copy=False):
Notes
-----
Negative input values will be shifted to the positive domain.
Negative input values will be clipped.
"""
return convert(image, np.uint16, force_copy)
@@ -351,8 +351,7 @@ def img_as_ubyte(image, force_copy=False):
Notes
-----
If the input data-type is positive-only (e.g., uint16), then
the output image will still only have positive values.
Negative input values will be clipped.
"""
return convert(image, np.uint8, force_copy)