From 339e6aa7824f1b361b1fb3e6f486120eb7ed4864 Mon Sep 17 00:00:00 2001 From: Milania1 Date: Thu, 12 Mar 2015 16:46:25 +0100 Subject: [PATCH] fixed error in hough lines tutorial (the point (9,4) is not on the lines, but the point (4,9) is) --- doc/tutorials/imgproc/imgtrans/hough_lines/hough_lines.rst | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/doc/tutorials/imgproc/imgtrans/hough_lines/hough_lines.rst b/doc/tutorials/imgproc/imgtrans/hough_lines/hough_lines.rst index e7b6b14e52..09f6592800 100644 --- a/doc/tutorials/imgproc/imgtrans/hough_lines/hough_lines.rst +++ b/doc/tutorials/imgproc/imgtrans/hough_lines/hough_lines.rst @@ -57,7 +57,7 @@ How does it work? We consider only points such that :math:`r > 0` and :math:`0< \theta < 2 \pi`. -#. We can do the same operation above for all the points in an image. If the curves of two different points intersect in the plane :math:`\theta` - :math:`r`, that means that both points belong to a same line. For instance, following with the example above and drawing the plot for two more points: :math:`x_{1} = 9`, :math:`y_{1} = 4` and :math:`x_{2} = 12`, :math:`y_{2} = 3`, we get: +#. We can do the same operation above for all the points in an image. If the curves of two different points intersect in the plane :math:`\theta` - :math:`r`, that means that both points belong to a same line. For instance, following with the example above and drawing the plot for two more points: :math:`x_{1} = 4`, :math:`y_{1} = 9` and :math:`x_{2} = 12`, :math:`y_{2} = 3`, we get: .. image:: images/Hough_Lines_Tutorial_Theory_2.jpg :alt: Polar plot of the family of lines for three points