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Merge pull request #802 from jni/allow-rgb-save

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Modify mpl_image_to_rgba to allow RGB input image
This commit is contained in:
Tony S Yu
2013-10-28 21:49:45 -07:00
parent d5776656a8 e45aee3369
commit 3ac124b277
1 changed files with 20 additions and 4 deletions
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skimage/viewer/viewers/core.py
+20 -4
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@@ -20,12 +20,28 @@ __all__ = ['ImageViewer', 'CollectionViewer']
def mpl_image_to_rgba(mpl_image):
"""Return RGB image from the given matplotlib image object.
Each image in a matplotlib figure has it's own colormap and normalization
Each image in a matplotlib figure has its own colormap and normalization
function. Return RGBA (RGB + alpha channel) image with float dtype.
Parameters
----------
mpl_image : matplotlib.image.AxesImage object
The image being converted.
Returns
-------
img : array of float, shape (M, N, 4)
An image of float values in [0, 1].
"""
input_range = (mpl_image.norm.vmin, mpl_image.norm.vmax)
image = rescale_intensity(mpl_image.get_array(), in_range=input_range)
image = mpl_image.cmap(img_as_float(image)) # cmap complains on bool arrays
image = mpl_image.get_array()
if image.ndim == 2:
input_range = (mpl_image.norm.vmin, mpl_image.norm.vmax)
image = rescale_intensity(image, in_range=input_range)
# cmap complains on bool arrays
image = mpl_image.cmap(img_as_float(image))
elif image.ndim == 3 and image.shape[2] == 3:
# add alpha channel if it's missing
image = np.dstack((image, np.ones_like(image)))
return img_as_float(image)