Merge pull request #21256 from zchrissirhcz:fix-3.4-pyramid-tutorial

doc/tutorials/imgproc/pyramids/pyramids.markdown

@@ -47,7 +47,7 @@ Theory
 -   To produce layer \f$(i+1)\f$ in the Gaussian pyramid, we do the following:
     -   Convolve \f$G_{i}\f$ with a Gaussian kernel:
 
-        \f[\frac{1}{16} \begin{bmatrix} 1 & 4 & 6 & 4 & 1  \\ 4 & 16 & 24 & 16 & 4  \\ 6 & 24 & 36 & 24 & 6  \\ 4 & 16 & 24 & 16 & 4  \\ 1 & 4 & 6 & 4 & 1 \end{bmatrix}\f]
+        \f[\frac{1}{256} \begin{bmatrix} 1 & 4 & 6 & 4 & 1  \\ 4 & 16 & 24 & 16 & 4  \\ 6 & 24 & 36 & 24 & 6  \\ 4 & 16 & 24 & 16 & 4  \\ 1 & 4 & 6 & 4 & 1 \end{bmatrix}\f]
 
     -   Remove every even-numbered row and column.