Here is an example with the original image on the left and the black and white image on the right.

\begin{figure}[H]
	\centering
	\includegraphics[width=0.45\textwidth]{sections/partie-technique/traitement-image/examples/tv_test_pattern.png}
	\includegraphics[width=0.45\textwidth]{sections/partie-technique/traitement-image/examples/black_white_tv.png}
	\caption{Original image and black and white image}
\end{figure}