cspresnext_50(pretrained: bool = False, overrides: object = {})CSPResNeXt-50 backbone — ResNeXt-50 (32x4d) with CSP wrap.
The CSPNet recipe applied to the grouped-conv ResNeXt-50 trunk
(Wang et al., CVPRW 2020). Returns the final feature map only;
pair with a classifier head via cspresnext_50_cls.
Reference: Wang et al., "CSPNet: A New Backbone that can Enhance Learning Capability of CNN", CVPRW 2020 (arXiv:1911.11929).