class_docstr: RoI head for Double Head RCNN.
  
  https://arxiv.org/abs/1904.06493
class_docstr_tok: ["RoI","head","for","Double","Head","RCNN",".","https",":","\/\/arxiv.org\/abs\/1904.06493"]
docstr: Box head forward function used in both training and testing time.
docstr_tok: ["Box","head","forward","function","used","in","both","training","and","testing","time","."]
code: def _bbox_forward(self, x, rois):
      """Box head forward function used in both training and testing time."""
      bbox_cls_feats = self.bbox_roi_extractor(
          x[: self.bbox_roi_extractor.num_inputs], rois
      )
      bbox_reg_feats = self.bbox_roi_extractor(
          x[: self.bbox_roi_extractor.num_inputs],
          rois,
          roi_scale_factor=self.reg_roi_scale_factor,
      )
      if self.with_shared_head:
          bbox_cls_feats = self.shared_head(bbox_cls_feats)
          bbox_reg_feats = self.shared_head(bbox_reg_feats)
      cls_score, bbox_pred = self.bbox_head(
          bbox_cls_feats, bbox_reg_feats
      )
  
      bbox_results = dict(
          cls_score=cls_score,
          bbox_pred=bbox_pred,
          bbox_feats=bbox_cls_feats,
      )
      return bbox_results
  
imports: from ..builder import HEADS
  from .standard_roi_head import StandardRoIHead
label_desc: Use image node_id 2 for calling the DoubleHeadRoIHead obj's underlying member method code with example usage: obj._bbox_forward(x, rois) and returns: bbox_results