\begin{figure}[ht!]
\centering
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/imL.png}
\caption{left image}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/dispL.png}
\caption{GT}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/tsukuba_unary.png}
\caption{unary}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/1/tsukuba_SGM_iter_50_TL_trunc_2_dir_8_rho_1.png}
\caption{1 SGM-8}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/1/tsukuba_ISGMR_iter_50_TL_trunc_2_dir_8_rho_1.png}
\caption{1 ISGMR-8}
\end{subfigure}
\\% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_MeanField_iter_50_TL_trunc_2_dir_4_rho_1.png}
\caption{MF-4}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_MeanField_iter_50_TL_trunc_2_dir_8_rho_1.png}
\caption{MF-8}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_MeanField_iter_50_TL_trunc_2_dir_16_rho_1.png}
\caption{MF-16}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_TRWS.png}
\caption{TRWS-4}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_ISGMR_iter_50_TL_trunc_2_dir_4_rho_1.png}
\caption{ISGMR-4}
\end{subfigure}
\\% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_ISGMR_iter_50_TL_trunc_2_dir_8_rho_1.png}
\caption{ISGMR-8}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_ISGMR_iter_50_TL_trunc_2_dir_16_rho_1.png}
\caption{ISGMR-16}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_TRWP_iter_50_TL_trunc_2_dir_4_rho_05.png}
\caption{TRWP-4}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_TRWP_iter_50_TL_trunc_2_dir_8_rho_05.png}
\caption{TRWP-8}
\label{fig:tsukuba-label-TRWP-8}
\end{subfigure}
% ~
\begin{subfigure}[b]{0.18\textwidth}
\includegraphics[width=\textwidth]{stereo/tsukuba/50/tsukuba_TRWP_iter_50_TL_trunc_2_dir_16_rho_05.png}
\caption{TRWP-16}
\end{subfigure}
\caption{Disparities of Tsukuba. (d)-(e) are at 1st iteration. (f)-(o) are at 50th iteration. (j) and (l) have the lowest energies in ISGMR-related and TRWP-related methods respectively. TRWP-4 and TRWS-4 have similar disparities for the most parts.}
\label{fig:tsukuba-label}
\end{figure}