What's the meaning about the shape of "box_deltas": [N, 4 * num_classes]

ijkguo / mx-rcnn

Parallel Faster R-CNN implementation with MXNet.

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What's the meaning about the shape of "box_deltas": [N, 4 * num_classes] #122

Open seekFire opened 4 years ago

seekFire commented 4 years ago

In symdata/bbox.py, function "bbox_pred": Why "box_deltas" has the shape of [N, 4 num_classes]? I can't understand what the "4num_classes" represents