\begin{table}[t]
\fontsize{5}{6}\selectfont
	\centering
	\caption{\rev{Architectural details of the FPN architecture employed by \myalgoname\ for different backbones. For each baseline pipeline (MRNet, ELNet), we report: the size $\width_{\level} \times \height_{\level} \times C_{\level}$ of the feature maps at each backbone level $\level$; the layer configuration of the lateral connection (kernel size and number of channels of the convolutional layers, and activation function); the layer configuration of the up-sampling module (kernel size and number of channels of the convolutional layers, activation functions, and eventual normalization layers - ``bil interp'' stands for the bilinear interpolation operation).}}
	\label{tab:fpnconv}
	\setlength\tabcolsep{.14cm}
	\begin{tabular}{c | c | c c c c c }
		\toprule
		\multirow{2}{*}{Backbone} & \multirow{2}{*}{Module} & \multicolumn{5}{c}{Backbone Level} \\
         &  & $\level = 1$ & $\level = 2$ & $\level = 3$ & $\level = 4$ & $\level = 5$ \\
    	\midrule
    	
    	\multirow{7}{*}{MRNet} & Output Size & $31 \times 31 \times 64$ & $15 \times 15 \times 192$ & $15 \times 15 \times 384$  & $15 \times 15 \times 256$  & $7 \times 7 \times 256$ \\
    	\cmidrule{2-7}
    	 & \multirow{2}{*}{Lateral Connection} & Conv 1x1 64 - 64  & Conv 1x1  192 - 192 & Conv 1x1 384 - 384 & Conv 1x1  256 - 256 & - \\
    	 &  & ReLU & ReLU & ReLU & ReLU & - \\
    	\cmidrule{2-7}
    	
    	 & \multirow{5}{*}{Up-sampling} & -  & bil interp  & bil interp & bil interp  & bil interp  \\
    	 & & - & Conv 1x1 192 - 64 & Conv 1x1 384 - 192 & Conv 1x1 256 - 384 & Conv 1x1 256 - 256 \\
    	 &  & - & ReLU & ReLU & ReLU & ReLU \\
    	 & & - & Conv 3x3 64 - 64 & Conv 3x3 192 - 192 & Conv 3x3 384 - 384 & Conv 3x3 256 - 256 \\
    	 &  & - & ReLU & ReLU & ReLU & ReLU \\
    	 
    	 \midrule

        \multirow{9}{*}{ELNet} & Output Size & $62 \times 62 \times 16$ & $29 \times 29 \times 32$ & $13 \times 13 \times 64$  & $5 \times 5 \times 64$  & $5 \times 5 \times 64$ \\
    	\cmidrule{2-7}
    	 & \multirow{2}{*}{Lateral Connection} & Conv 1x1 16 - 16  & Conv 1x1  32 - 32 & Conv 1x1 64 - 64 & Conv 1x1  64 - 64 & - \\
    	 &  & ReLU & ReLU & ReLU & ReLU & - \\
    	\cmidrule{2-7}
    	
    	 & \multirow{6}{*}{Up-sampling} & -  & bil interp  & bil interp & bil interp  & bil interp  \\
    	 & & - & Conv 1x1 32 - 16 & Conv 1x1 64 - 32 & Conv 1x1 64 - 64 & Conv 1x1 64 - 64 \\
    	 &  & - & ReLU & ReLU & ReLU & ReLU \\
    	 & & - & Conv 3x3 16 - 16 & Conv 3x3 32 - 32 & Conv 3x3 64 - 64 & Conv 3x3 64 - 64 \\
    	 & & - & Norm & Norm & Norm & Norm \\
    	 &  & - & ReLU & ReLU & ReLU & ReLU \\
    	 
    	
        \bottomrule
\end{tabular}
\end{table}