Deep Learning, Artificial Intelligence, Convolutional Network, Object Detection, Data Science.
for all input RoIs (R) (green arrows). Then the hard RoI sampling module uses OHEM to select hard examples (Rhard-sel), which are input to the regular RoI network (red arrows). This network computes forward and backward passes only for Rhard-sel. 4. Experimental Results 4.1 OHEM on PASCAL VOC 2007