Table 1.

Stage structure

Name	Layers
Stage 1	$\left[\begin{array}{c}1\times 1,64\hfill \\ 3\times 3,64\hfill \\ 1\times 1,256\hfill \end{array}\right]\times 3$
Stage 2	$\left[\begin{array}{c}1\times 1,128\hfill \\ 3\times 3,128\hfill \\ 1\times 1,512\hfill \end{array}\right]\times 4$
Stage 3	$\left[\begin{array}{c}1\times 1,256\hfill \\ 3\times 3,256\hfill \\ 1\times 1,1024\hfill \end{array}\right]\times 6$
Stage 4${}^{*}$	$\left[\begin{array}{c}1\times 1,512\hfill \\ 3\times 3,512\hfill \\ 1\times 1,1048\hfill \end{array}\right]\times 3$

${}^{*}$The first stage contains 3 three-layer convolutions, the second stage contains 4 three-layer convolutions, the third stage contains 6 three-layer convolutions, and the fourth stage contains 3 three-layer convolutions, each stage contains the same convolution kernel size, and the number of channels is different.