% \begin{table*}[t]
%     \centering
%     \caption{\xxx{Quantitative outpainting results. \textbf{Bold}: best, *significant (paired t-test, p\textless 0.05). The inference time is reported for a batch size of 4 and inference step of 1000. LOTUS significantly outperforms RePaint for all outpainting window sizes (OW).}}
%     % \begin{adjustbox}{width=\textwidth}
%     \begin{adjustbox}{width=\textwidth}
%     \setlength{\tabcolsep}{5pt}
%     \renewcommand{\arraystretch}{0.9}
%     \footnotesize % 使用小字体
%     % \begin{tabular}{|l|ccc|ccc|}
%     \begin{tabular}{l|ccc|ccc}
%     \hline
%         \multirow{2}{*}{Metric} & \multicolumn{3}{c|}{RePaint} & \multicolumn{3}{c}{LOTUS} \\ 
%         \cline{2-7}
%         & \multicolumn{1}{c|}{OW=32} & \multicolumn{1}{c|}{OW=40} & \multicolumn{1}{c|}{OW=48} & \multicolumn{1}{c|}{OW=32} & \multicolumn{1}{c|}{OW=40} & \multicolumn{1}{c}{OW=48} \\ 
%         \hline
%         % \cline{1-7}
%         NCC↑ & \multicolumn{1}{c|}{0.108$\pm$0.035} & \multicolumn{1}{c|}{0.197$\pm$0.031} & \multicolumn{1}{c|}{0.329$\pm$0.039} & \multicolumn{1}{c|}{\textbf{0.713$\pm$0.095*}} & \multicolumn{1}{c|}{\textbf{0.810$\pm$0.108*}} & \multicolumn{1}{c}{\textbf{0.920$\pm$0.037*}} \\ 
%         % \hline
%         SSIM↑ & \multicolumn{1}{c|}{0.345$\pm$0.114} & \multicolumn{1}{c|}{0.474$\pm$0.118} & \multicolumn{1}{c|}{0.706$\pm$0.141} & \multicolumn{1}{c|}{\textbf{0.472$\pm$0.052*}} & \multicolumn{1}{c|}{\textbf{0.613$\pm$0.048*}} & \multicolumn{1}{c}{\textbf{0.816$\pm$0.038*}} \\ 
%         % \hline
%         MSE($\times$10)↓ & \multicolumn{1}{c|}{0.788$\pm$0.027} & \multicolumn{1}{c|}{0.533$\pm$0.022} & \multicolumn{1}{c|}{0.283$\pm$0.014} & \multicolumn{1}{c|}{\textbf{0.257$\pm$0.006*}} & \multicolumn{1}{c|}{\textbf{0.209$\pm$0.005*}} & \multicolumn{1}{c}{\textbf{0.128$\pm$0.003*}} \\ \hline
%         \multicolumn{1}{l|}{Param Size↓}& \multicolumn{3}{c|}{759.4MB(3D DM)} & \multicolumn{3}{c}{\textbf{9.2MB(3D AE)+12.0MB(3D LDM)}} \\ 
%         \cline{1-7}
%         \multicolumn{1}{l|}{Inf Time↓}& \multicolumn{3}{c|}{40 minutes/batch} & \multicolumn{3}{c}{\textbf{59 seconds/batch}} \\ 
%         \cline{1-7}
%     \end{tabular}
%     \end{adjustbox}
%     \label{tab:quant_results}
% \end{table*}



\begin{table*}[t]
    \centering
    \caption{Quantitative outpainting results. \textbf{Bold}: best, *significant (paired t-test, p\textless 0.05). The inference time is reported for a batch size of 4 and inference step of 1000. LOTUS significantly outperforms RePaint for all outpainting window sizes (OW).}
    % \begin{adjustbox}{width=\textwidth}
    \begin{adjustbox}{width=\textwidth}
    \setlength{\tabcolsep}{5pt}
    \renewcommand{\arraystretch}{0.9}
    \footnotesize % 
    % \begin{tabular}{|l|ccc|ccc|}
    \begin{tabular}{l|ccc|ccc}
    \hline
        \multirow{2}{*}{Metric} & \multicolumn{3}{c|}{RePaint} & \multicolumn{3}{c}{LOTUS} \\ 
        \cline{2-7}
        & \multicolumn{1}{c|}{OW=32} & \multicolumn{1}{c|}{OW=40} & \multicolumn{1}{c|}{OW=48} & \multicolumn{1}{c|}{OW=32} & \multicolumn{1}{c|}{OW=40} & \multicolumn{1}{c}{OW=48} \\ 
        \hline
        % \cline{1-7}
        NCC↑ & \multicolumn{1}{c|}{0.522$\pm$0.082} & \multicolumn{1}{c|}{0.600$\pm$0.052} & \multicolumn{1}{c|}{0.779$\pm$0.048} & \multicolumn{1}{c|}{\textbf{0.713$\pm$0.095*}} & \multicolumn{1}{c|}{\textbf{0.810$\pm$0.108*}} & \multicolumn{1}{c}{\textbf{0.920$\pm$0.037*}} \\ 
        % \hline
        SSIM↑ & \multicolumn{1}{c|}{0.175$\pm$0.055} & \multicolumn{1}{c|}{0.332$\pm$0.061} & \multicolumn{1}{c|}{0.635$\pm$0.065} & \multicolumn{1}{c|}{\textbf{0.472$\pm$0.052*}} & \multicolumn{1}{c|}{\textbf{0.613$\pm$0.048*}} & \multicolumn{1}{c}{\textbf{0.816$\pm$0.038*}} \\ 
        % \hline
        MSE($\times$10)↓ & \multicolumn{1}{c|}{0.779$\pm$0.161} & \multicolumn{1}{c|}{0.573$\pm$0.130} & \multicolumn{1}{c|}{0.266$\pm$0.080} & \multicolumn{1}{c|}{\textbf{0.257$\pm$0.006*}} & \multicolumn{1}{c|}{\textbf{0.209$\pm$0.005*}} & \multicolumn{1}{c}{\textbf{0.128$\pm$0.003*}} \\ \hline
        \multicolumn{1}{l|}{Param Size↓}& \multicolumn{3}{c|}{759.4MB(3D DM)} & \multicolumn{3}{c}{\textbf{9.2MB(3D AE)+12.0MB(3D LDM)}} \\ 
        \cline{1-7}
        \multicolumn{1}{l|}{Inf Time↓}& \multicolumn{3}{c|}{40 minutes/batch} & \multicolumn{3}{c}{\textbf{59 seconds/batch}} \\ 
        \cline{1-7}
    \end{tabular}
    \end{adjustbox}
    \label{tab:quant_results}
\end{table*}

