Definition of ResNet

In resnet.py (line 117 `self.layer4 = self._make_layer(block, 512, layers[3], stride=1)`), stride is equal to 1. This results in that the size of p4 is equal to the size of p5. Is there any reason about this setting?

Start at resnet.py line 117 and inspect how the stride setting affects p4 and p5 in this ResNet/FPN implementation. Compare the resulting feature-map sizes with the intended object-detection pyramid behavior; the issue is done when the setting's rationale is confirmed or the required correction is clearly established.

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