why does the value of ‘detection_threshold’ not affect the number of keypoints？

[yangsenius]

https://github.com/umich-vl/pose-ae-train/blob/454d4ba113bbb9775d4dc259ef5e6c07c2ceed54/utils/group.py#L34
Thanks for your code！
I made some experiments about the value of ’detection_threshold‘，and found that it had no impact on the final visualized keypoints even if i set it as 10. From my understanding，the number of the visualized keypoints should be less if i set a higher detection threshold value. Could you explain this ? Thanks!