Body model feature map number 19.

[gheaeckkseqrz]

Hi, I noticed the body model return a tensor with 19 channels. Adding print("Mconv7_stage6_L2", Mconv7_stage6_L2.shape) in openpose/body/estimator.py on line 139 will print Mconv7_stage6_L2 torch.Size([1, 19, 23, 17]) for the demo image. The openpose model has only 18 keypoints. What is channel 19 for ?

Best, Pierre