fix/update RCNN-family docstrings (#8231)

torchvision/models/detection/faster_rcnn.py

@@ -96,8 +96,7 @@ class FasterRCNN(GeneralizedRCNN):
             for computing the loss
         rpn_positive_fraction (float): proportion of positive anchors in a mini-batch during training
             of the RPN
-        rpn_score_thresh (float): during inference, only return proposals with a classification score
-            greater than rpn_score_thresh
+        rpn_score_thresh (float): only return proposals with an objectness score greater than rpn_score_thresh
         box_roi_pool (MultiScaleRoIAlign): the module which crops and resizes the feature maps in
             the locations indicated by the bounding boxes
         box_head (nn.Module): module that takes the cropped feature maps as input

torchvision/models/detection/keypoint_rcnn.py

@@ -83,8 +83,7 @@ class KeypointRCNN(FasterRCNN):
             for computing the loss
         rpn_positive_fraction (float): proportion of positive anchors in a mini-batch during training
             of the RPN
-        rpn_score_thresh (float): during inference, only return proposals with a classification score
-            greater than rpn_score_thresh
+        rpn_score_thresh (float): only return proposals with an objectness score greater than rpn_score_thresh
         box_roi_pool (MultiScaleRoIAlign): the module which crops and resizes the feature maps in
             the locations indicated by the bounding boxes
         box_head (nn.Module): module that takes the cropped feature maps as input

torchvision/models/detection/mask_rcnn.py

@@ -84,8 +84,7 @@ class MaskRCNN(FasterRCNN):
             for computing the loss
         rpn_positive_fraction (float): proportion of positive anchors in a mini-batch during training
             of the RPN
-        rpn_score_thresh (float): during inference, only return proposals with a classification score
-            greater than rpn_score_thresh
+        rpn_score_thresh (float): only return proposals with an objectness score greater than rpn_score_thresh
         box_roi_pool (MultiScaleRoIAlign): the module which crops and resizes the feature maps in
             the locations indicated by the bounding boxes
         box_head (nn.Module): module that takes the cropped feature maps as input

torchvision/models/detection/rpn.py

@@ -133,6 +133,7 @@ class RegionProposalNetwork(torch.nn.Module):
             contain two fields: training and testing, to allow for different values depending
             on training or evaluation
         nms_thresh (float): NMS threshold used for postprocessing the RPN proposals
+        score_thresh (float): only return proposals with an objectness score greater than score_thresh
 
     """