Depth problem with BlendedMVS++

[otakuxiang]

I recently download BlendedMVS++ and I try to project the pixels from ref view to src views with ground-truth depth image. And I found there are significant difference between the original pixel and projected pixels. Here is the match result

Does any one find the same problem?
I know the extrinsic is world to camera pose and i use read_pfm function in CasMVSNet.