AUC for HPatches Image Matching MMA

[Wujingqian]

Hi!
Thank you so much for this work.
I noticed in this paper you reported AUC(5px) for HPatches Image Matching MMA (0.698 for DISK 8k).
Could you please explain how this AUC is calculated at each threshold? How did you derive 0.698?
Or if you could kindly provide the code for this, that would be great!
Thank you so much!