I have a question about InsightFace and ArcFace

[0gyun]

Hi, I have a question about InsightFace, especially ArcFace.

Every time I run the InstantID model, ArcFace's face embedding has different results for the same image.
Is this a natural result? I think face encoder should make same results for the same image.
Or is it a attribute of Angular margin loss function?

Thank you for your help