Pith Number

pith:SZ4T6BLE

pith:2021:SZ4T6BLEA6WWFNML2TCV4OF5AM

not attested not anchored not stored refs pending

EfficientPhys: Enabling Simple, Fast and Accurate Camera-Based Vitals Measurement

Brian L. Hill, Daniel McDuff, Shwetak Patel, Xin Liu, Ziheng Jiang

arxiv:2110.04447 v3 · 2021-10-09 · cs.CV · cs.AI · cs.HC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SZ4T6BLEA6WWFNML2TCV4OF5AM}

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.

Cited by

1 paper in Pith

Phase-shifted remote photoplethysmography for estimating heart rate and blood pressure from facial video

Receipt and verification

First computed	2026-07-05T05:26:02.782749Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96793f056407ad62b58bd4c55e38bd03150f3a12ad452ee541499bf92da5daf0

Aliases

arxiv: 2110.04447 · arxiv_version: 2110.04447v3 · doi: 10.48550/arxiv.2110.04447 · pith_short_12: SZ4T6BLEA6WW · pith_short_16: SZ4T6BLEA6WWFNML · pith_short_8: SZ4T6BLE

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/SZ4T6BLEA6WWFNML2TCV4OF5AM \
  | 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: 96793f056407ad62b58bd4c55e38bd03150f3a12ad452ee541499bf92da5daf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7bc6f7f8e22df5cae2ae74e0704ccb5b5dccf2a1e2e44ef852488ead79b4e427",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.HC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-10-09T03:51:26Z",
    "title_canon_sha256": "b215495abb2e8fa2ef804503725295d269095b743281437f69694793303a95c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2110.04447",
    "kind": "arxiv",
    "version": 3
  }
}