The problem of camera parameter “sc”

[moondabaojian]

Hello,Thank you for your excellent work!
I can get normal tx, ty and shape-loss during training process, but it's hard for me to get the normal camera parameter "sc", so it's hard for me to reduce keypoints-loss, at the same time, the model points will diverge.
Hope to get your advice!

[wzyinparis]

Hello, can you give me your wechat?
I want to discuss this project with you.