| --- |
| license: cc-by-nc-4.0 |
| pretty_name: HairCS |
| size_categories: |
| - 10K<n<100K |
| tags: |
| - hair |
| - strands |
| - 3d |
| - computer-graphics |
| - point-cloud |
| --- |
| |
| # HairCS |
|
|
| HairCS is a strand-based hair dataset: **53,336 hair assets** in 13 versions, each stored as a |
| point cloud of **60,000 strands x 64 samples** (xyz, float16), plus a rendered preview image of |
| every asset, per-asset hairstyle labels, the head/scalp geometry the hair is grown on, and a small |
| Python toolkit (viewer and strand-to-surface conversion). |
|
|
| All versions share the same head and the same coordinate frame (see `meta/`). |
|
|
| ## Versions |
|
|
| | Version | Assets | Description | |
| |---|---|---| |
| | `v0` | 1,076 | Base hair | |
| | `v1` | 1,076 | `v0` + scale and fuzz modifier | |
| | `v2` | 818 | Curly profile 1 | |
| | `v3` | 844 | Curly profile 2 | |
| | `v4` | 650 | Curly + scale and fuzz modifier | |
| | `v5` | 1,539 | Blend: bob (`00000`-`00065`) and shoulder (`00066`-`01538`) | |
| | `v6` | 1,539 | `v5` + curly profile 1 | |
| | `v7` | 6,086 | Blend: shoulder | |
| | `v8` | 6,086 | `v7` + curly profile 1 | |
| | `v9` | 8,585 | Blend: short | |
| | `v10` | 8,585 | `v9` + curly profile 1 | |
| | `v11` | 8,226 | Blend: long | |
| | `v12` | 8,226 | `v11` + curly profile 1 | |
|
|
| Terminology: |
|
|
| - **Blend** – assets produced with the hair blending method described in the paper. |
| - **Curly profile 1** – the helix operator from the paper, with its first parameter profile. |
| - **Curly profile 2** – the helix operator with a second parameter profile. |
| - **Scale and fuzz modifier** – per-strand scaling plus a fuzz perturbation applied on top of the base hair. |
|
|
| ## Repository layout |
|
|
| ``` |
| data/vN/XXXXX.npz one asset per file, key "P": (60000, 64, 3) float16, samples ordered root -> tip |
| render/vN.zip one PNG preview per asset, named XXXX.png (4-digit index, same order as data/vN) |
| label/vN.csv hairstyle class per asset (columns: number,class) |
| meta/ head and scalp geometry shared by all versions (OBJ) |
| full_body_geo.obj |
| head_water_tight_boundary.obj |
| head_with_uv.obj |
| scalp_with_uv.obj |
| argument/ viewer + strand-to-surface tools (see argument/README.md) |
| ``` |
|
|
| Every `data/vN/` folder holds exactly the number of assets listed in the table, numbered |
| `00000` to `N-1`. |
|
|
| ## Loading an asset |
|
|
| ```python |
| import numpy as np |
| |
| d = np.load("data/v0/00000.npz") |
| P = d["P"].astype(np.float32) # (60000, 64, 3): 60000 strands, 64 samples per strand, xyz |
| roots, tips = P[:, 0], P[:, -1] # samples are ordered root -> tip |
| ``` |
|
|
| The head meshes in `meta/` are in the same coordinate frame as the strands, so an asset can be |
| placed on `head_with_uv.obj` or `scalp_with_uv.obj` without any transform. |
|
|
| ## Labels |
|
|
| `label/vN.csv` gives one hairstyle class per asset: |
|
|
| | Class | Meaning | |
| |---|---| |
| | `short` | short hair | |
| | `bob` | bob cut | |
| | `shoulder` | shoulder-length hair | |
| | `long` | long hair | |
| | `gather` | gathered / tied-back hair | |
|
|
| For `v0`-`v6` the classes were assigned per asset. For `v7`-`v12` every asset of a version |
| shares the class of the blend target of that version (`v7`/`v8`: shoulder, `v9`/`v10`: short, |
| `v11`/`v12`: long). |
|
|
| ## Downloading |
|
|
| The full dataset is about 963 GB. Fetch only what you need with `--include`: |
|
|
| ```bash |
| pip install -U huggingface_hub |
| hf download HairCS2027/HairCS --repo-type dataset --local-dir HairCS \ |
| --include "meta/*" "label/*" "argument/*" # small files, ~25 MB |
| hf download HairCS2027/HairCS --repo-type dataset --local-dir HairCS \ |
| --include "data/v4/*" "render/v4.zip" # one version, ~11 GB |
| ``` |
|
|
| | Folder | Size | |
| |---|---| |
| | `data/` | ~932 GB (13 versions, 10 to 154 GB each) | |
| | `render/` | ~31 GB (13 zips, 0.3 to 7 GB each) | |
| | `meta/`, `label/`, `argument/` | < 25 MB | |
|
|
| ## Tools |
|
|
| `argument/` contains a strand viewer (`run_viewer.py`) and a tool that wraps an asset in a |
| watertight mesh (`run_strand2surface.py`, with a batch runner and optional GPU path). |
| Usage and the expected on-disk layout are described in `argument/README.md`. |
|
|
| ## License |
|
|
| CC BY-NC 4.0. Non-commercial use only. |
|
|
| ## Citation |
|
|
| The accompanying paper is under review. A citation entry will be added on publication. |
|
|
