Pith Number

pith:5FCF5L7W

pith:2019:5FCF5L7WR6XG3F5XN5MX4BVDLN

not attested not anchored not stored refs pending

Non-contact photoplethysmogram and instantaneous heart rate estimation from infrared face video

Guillermo Sapiro, Hau-Tieng Wu, Martin Bertran, Natalia Martinez

arxiv:1902.05194 v1 · 2019-02-14 · 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{5FCF5L7WR6XG3F5XN5MX4BVDLN}

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	2026-05-17T23:54:01.639865Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9445eaff68fae6d97b76f597e06a35b6cd1f4669e640e783287aaea1834f50a

Aliases

arxiv: 1902.05194 · arxiv_version: 1902.05194v1 · doi: 10.48550/arxiv.1902.05194 · pith_short_12: 5FCF5L7WR6XG · pith_short_16: 5FCF5L7WR6XG3F5X · pith_short_8: 5FCF5L7W

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/5FCF5L7WR6XG3F5XN5MX4BVDLN \
  | 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: e9445eaff68fae6d97b76f597e06a35b6cd1f4669e640e783287aaea1834f50a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4b558dc617da1b3c527bcf6278d0f06061dcc182971beeace114cd370dbc8b71",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-02-14T03:01:28Z",
    "title_canon_sha256": "fb5b21b2385d1362df65eee5b0a0356c88ebd036d86a205f8248b2897ad61db9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.05194",
    "kind": "arxiv",
    "version": 1
  }
}