2044c2044
< \texttt{tilted}(X,Y) = \sum_{y<Y,abs(x-X)<y} \texttt{image}(x,y)
---
> \texttt{tilted}(X,Y) = \sum_{y<Y,abs(x-X+1)\leq Y-y-1} \texttt{image}(x,y)
2052a2053,2057
> As a practical example, the next figure shows the calculation of the integral of a straight rectangle \texttt{Rect(3,3,3,2)} and of a tilted rectangle \texttt{Rect(5,1,2,3)}. The selected pixels in the original \texttt{image} are shown, as well as the relative pixels in the integral images \texttt{sum} and \texttt{tilted}.
> 
> \begin{center}\includegraphics[width=0.8\textwidth]{pics/integral_examples}\end{center}
> 
>