How to convert 53K vertices to 43K. (for PRNet evaluation) 

Hi @reshow , Thank you for the source codes you released. I'm just wondering how did yo evaluate PRNet on AFLW2000 dataset? Coz the PRNet's outputs have 43K vertices while AFLW2000 ground truth have 53K vertices.
How did you reduce the groundtruth vertices to 43K?
Thank you in advance for your clarification.