| stem | 56×56 | 7×7, 64, stride 2
3×3 max pool, stride 2 | 7×7, 64, stride 2
3×3 max pool, stride 2 |
| res2 | 56×56 | $ \begin{array}{c}1\times \mathrm{1,64}\\ \,\,\quad 3\times \mathrm{3,64}\times3\\ 1\times \mathrm{1,256}\end{array} $ | $\begin{array}{c}1\times \mathrm{1,\,64}\\ \,\,\quad 3\times \mathrm{3,\,64}\times 3\\ 1\times \mathrm{1,\,256}\end{array}$ |
| res3 | 28×28 | $ \begin{array}{c}1\times \mathrm{1,128}\\ \,\, \quad 3\times \mathrm{3,128} \times 3 \\ 1\times \mathrm{1,128}\end{array} $ | $ \begin{array}{c}1\times \mathrm{1,128}\\ \,\,\, \quad 5\times \mathrm{5,128} \times 3\\ 1\times \mathrm{1,128}\end{array} $ |
| res4 | 14×14 | $\begin{array}{c}1\times \mathrm{1,256}\\ \,\, \quad 3\times \mathrm{3,256} \times 9\\ 1\times \mathrm{1,1\,024}\end{array}$ | $\begin{array}{c}1\times \mathrm{1,256}\\ \quad 5\times \mathrm{5,256} \times9 \\ 1\times \mathrm{1,1\,024}\end{array}$ |
| res5 | 7×7 | $\begin{array}{c}1\times \mathrm{1,512}\\ \,\,\quad 3\times \mathrm{3,512} \times 3 \\ 1\times \mathrm{1,2\,048}\end{array}$ | $\begin{array}{c}1\times \mathrm{1,512}\\ \,\,\quad 3\times \mathrm{3,512} \times 3 \\ 1\times \mathrm{1,2\,048}\end{array}$ |
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