problems about generate results

[XiaokunSun]

Thank you for your excellent work!
I run python src/gen_samples.py --outdir=out --model={model_folder} --roots=data/roots/rootPositions_10k.txt --head_mesh=data/head.obj --seeds=0-99 --trunc=0.8 and then get the hair and noticed that the generated result has too short hair and messy hair, is this normal?
Also what is the significance of "--trunc" and "--trunc-cutoff" in the gen_samples.py ?

[c-he]

Hi, thanks for your interest in our work!

1. The flyaway strands in Fig. 1 are normal. It's indeed a phenomenon we can observe in real hairstyles, like「呆毛」
2. These very short strands are caused by PCA decoding, as they can not fully recover zero-length strands. You can filter them with our provided scripts, see: https://github.com/c-he/perm?tab=readme-ov-file#rendering.
3. We don't have an extensive ablation on trunc and trunc-cutoff, so we just pick a common value used in StyleGAN/EG3D.

[XiaokunSun]

Thank you for your reply! One last question, when will you open source the hair reconstruction code? I am very interested in this application! Or can you open source the code about “attach a cylinder mesh onto each strand segment”? Thank you!

[c-he]

Sure please stay tuned! I'm now working on other projects, but I think I will release it (at least the cylinder code) later this year.

[XiaokunSun]

Thank you for your reply! I'm very much looking forward to it!