How to select stable keypoints from a HeatMap?

[wangzheyongle]

When I use the openpose-1.7.0-binaries-win64-gpu-python3.7 version and execute "bin\OpenPoseDemo.exe --video examples\media\video.avi", I notice that the output keypoints are very stable. However, when I use OpenCV's DNN module to load the Caffe model and obtain keypoints, there is more significant jitter.
Could you please provide information on what kind of processing or filtering is applied to the heatmap during the output stage in version 1.7.0 to ensure this stability?