Model Applied Situations with Matrix Operations
The $\perp$ Shape in the Figure Below Is Shown Using 9 Pixels

Model Applied Situations with Matrix Operations
The $\perp$ shape in the figure below is shown using 9 pixels in a $3 \times 3$ grid. The color levels are given to the right of the figure. Use the matrix $\left[ \begin{array} { l l l } 1 & 3 & 1 \\ 1 & 3 & 1 \\ 3 & 3 & 3 \end{array} \right]$ that represents a digital photograph of the $\perp$ shape to solve the problem.
-Adjust the contrast by changing the black to light grey and the light grey to black. Use matrix addition to accomplish this.

A) $\left[ \begin{array} { l l l } 1 & 3 & 1 \\ 1 & 3 & 1 \\ 3 & 3 & 3 \end{array} \right] + \left[ \begin{array} { r r r } 2 & - 2 & 2 \\ 2 & - 2 & 2 \\ - 2 & - 2 & - 2 \end{array} \right] = \left[ \begin{array} { l l l } 3 & 1 & 3 \\ 3 & 1 & 3 \\ 1 & 1 & 1 \end{array} \right]$
B)
$$\left[ \begin{array} { l l l } 1 & 3 & 1 \\1 & 3 & 1 \\3 & 3 & 3\end{array} \right] + \left[ \begin{array} { l l l } - 2 & - 2 & - 2 \\- 2 & - 2 & - 2 \\- 2 & - 2 & - 2\end{array} \right] = \left[ \begin{array} { l l l } 3 & 1 & 3 \\3 & 1 & 3 \\1 & 1 & 1\end{array} \right]$$
C)
$$\left[ \begin{array} { l l l } 1 & 3 & 1 \\1 & 3 & 1 \\3 & 3 & 3\end{array} \right] + \left[ \begin{array} { r r r } 1 & - 1 & 1 \\1 & - 1 & 1 \\- 1 & - 1 & - 1\end{array} \right] = \left[ \begin{array} { l l l } 3 & 1 & 3 \\3 & 1 & 3 \\1 & 1 & 1\end{array} \right]$$
D)
$$\left[ \begin{array} { l l l } 1 & 3 & 1 \\1 & 3 & 1 \\3 & 3 & 3\end{array} \right] + \left[ \begin{array} { l l l } 2 & 2 & 2 \\2 & 2 & 2 \\2 & 2 & 2\end{array} \right] = \left[ \begin{array} { l l l } 3 & 1 & 3 \\3 & 1 & 3 \\1 & 1 & 1\end{array} \right]$$