Convert gluoncv model: yolov3 error

[Rainweic]

These ops are not in mxnet serializer:

• slice_axis
• sigmoid
• expand_dims
• _arange
• broadcast_add
• slice_like
• exp
• elemwise_sub
• tile
• repeat
• _contrib_box_nms

[bzhang5]

@Rainweic These ops seem like preprocess or post processing part operators, you could cut off these operator if I am right. Normally, tmfile convert tool may not support pre processing or post processing part.

[Rainweic]

@Rainweic These ops seem like preprocess or post processing part operators, you could cut off these operator if I am right. Normally, tmfile convert tool may not support pre processing or post processing part.

唔， nms啥的可以剔除，但是

• slice_axis
• sigmoid
• expand_dims
• _arange
• broadcast_add
• slice_like
• exp
• elemwise_sub
• tile
• repeat
  这些也算前、后处理的算子么？