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DOC: emphasize annotation in histogram.

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Tony S Yu
2011-12-18 10:10:00 -05:00
parent 1e12ca0044
commit 8941798daf
1 changed files with 4 additions and 3 deletions
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doc/examples/plot_otsu.py
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@@ -6,9 +6,10 @@ Thresholding
Thresholding is used to create a binary image. This example uses Otsu's method
to calculate the threshold value.
Otsu's method calculates an "optimal" threshold by maximizing the variance
between the two classes of pixels, which are separated by the threshold.
Equivalently, the optimal threshold minimizes the intra-class variance.
Otsu's method calculates an "optimal" threshold (marked by a red line in the
histogram below) by maximizing the variance between two classes of pixels,
which are separated by the threshold. Equivalently, this threshold minimizes
the intra-class variance.
.. [1] http://en.wikipedia.org/wiki/Otsu's_method