how did you train a new model for another class?such as Pedestrian or Cyclist?

[caimumuxin]

1.The score of the prediction is too low.if I need to modify the alpha and beta?
2.And how should I set the object_list and filter the train dataset to make the balance of positive and negetive data?
3.I meet the problem like others in compute_iou():float divided by zero.How to avoid it?
If you have any ideas,welcome
pls,thank you