Author: Hakan Ardo <[email protected]>
Branch: extradoc
Changeset: r4481:1faf6f9b6a82
Date: 2012-08-08 20:48 +0200
http://bitbucket.org/pypy/extradoc/changeset/1faf6f9b6a82/
Log: typo
diff --git a/talk/dls2012/paper.tex b/talk/dls2012/paper.tex
--- a/talk/dls2012/paper.tex
+++ b/talk/dls2012/paper.tex
@@ -1033,12 +1033,12 @@
{K} = \left(
\begin{array}{ccc}
-1 & 0 & 1 \\
- -2 & 0 & 1 \\
+ -2 & 0 & 2 \\
-1 & 0 & 1 \\
\end{array}
\right) ,
\end{equation}
-and a Sobel y-derivative $D_y$ is formed convolving with $K^\top$. The
gradient magnitude is
+and a Sobel y-derivative $D_y$ is formed convolving $I$ with $K^\top$. The
gradient magnitude is
then formed for each pixel independently by $\sqrt{D_x^2 + D_y^2}$. The two
convolutions and the pixelwise
magnitude calculation are combined in the implementation of this benchmark and
calculated in a single pass over
the input image. This single pass consists of two nested loops with a somewhat
larger amount of calculations
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