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Account for case when image only contains one unique value

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Johannes Schönberger
2014-08-08 17:01:52 -04:00
parent 8aa5ef8697
commit fc085ec779
1 changed files with 9 additions and 0 deletions
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skimage/filter/thresholding.py
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@@ -245,7 +245,16 @@ def threshold_isodata(image, nbins=256, return_all=False):
"""
hist, bin_centers = histogram(image, nbins)
# image only contains one unique value
if len(bin_centers) == 1:
if return_all:
return bin_centers
else:
return bin_centers[0]
hist = hist.astype(np.float32)
# csuml and csumh contain the count of pixels in that bin or lower, and
# in all bins strictly higher than that bin, respectively
csuml = np.cumsum(hist)