Pith Number

pith:VDG7JNKN

pith:2019:VDG7JNKNUYZJI6R2AF3624RVPB

not attested not anchored not stored refs pending

Optical Flow Techniques for Facial Expression Analysis -- a Practical Evaluation Study

Benjamin Allaert, Chaabane Djeraba, Ioan Marius Bilasco, Isaac Ronald Ward, Mohammed Bennamoun

arxiv:1904.11592 v3 · 2019-04-25 · cs.CV

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VDG7JNKNUYZJI6R2AF3624RVPB}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T07:57:25.245994Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8cdf4b54da632947a3a0177ed723578693efbc64eb63dccfe2c42f39c162788

Aliases

arxiv: 1904.11592 · arxiv_version: 1904.11592v3 · doi: 10.48550/arxiv.1904.11592 · pith_short_12: VDG7JNKNUYZJ · pith_short_16: VDG7JNKNUYZJI6R2 · pith_short_8: VDG7JNKN

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/VDG7JNKNUYZJI6R2AF3624RVPB \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a8cdf4b54da632947a3a0177ed723578693efbc64eb63dccfe2c42f39c162788

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74ba2f5b5dd1ce885e88b37b41e2f7f8e693c97318ce59e1030909a5ef6f2109",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-04-25T21:14:13Z",
    "title_canon_sha256": "4fec9501e3947b8d3da082eabb73d136e5c3244a25fae233526563a810f92f9c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.11592",
    "kind": "arxiv",
    "version": 3
  }
}