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fixed formula in cvIntegral/integral description

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Vadim Pisarevsky
2011-06-19 23:24:01 +00:00
parent 108fc3f4fe
commit 2e54482de9
2 changed files with 2 additions and 2 deletions
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modules/imgproc/doc/miscellaneous_transformations.rst
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@@ -634,7 +634,7 @@ Using these integral images, you can calculate sum, mean and standard deviation
.. math::
\sum _{x_1 \leq x < x_2, \, y_1 \leq y < y_2} \texttt{image} (x,y) = \texttt{sum} (x_2,y_2)- \texttt{sum} (x_1,y_2)- \texttt{sum} (x_2,y_1)+ \texttt{sum} (x_1,x_1)
\sum _{x_1 \leq x < x_2, \, y_1 \leq y < y_2} \texttt{image} (x,y) = \texttt{sum} (x_2,y_2)- \texttt{sum} (x_1,y_2)- \texttt{sum} (x_2,y_1)+ \texttt{sum} (x_1,y_1)
It makes possible to do a fast blurring or fast block correlation with a variable window size, for example. In case of multi-channel images, sums for each channel are accumulated independently.