Pith Number

pith:7ET2GTG5

pith:2018:7ET2GTG5V4GU5UD5WQV5BJYVRP

not attested not anchored not stored refs pending

A Simplified Active Calibration algorithm for Focal Length Estimation

Anup Basu, Mehdi Faraji

arxiv:1806.03584 v1 · 2018-06-10 · 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{7ET2GTG5V4GU5UD5WQV5BJYVRP}

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	2026-05-18T00:13:42.880102Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f927a34cddaf0d4ed07db42bd0a7158bc05d87b2ade81014f2aa34cd86f77158

Aliases

arxiv: 1806.03584 · arxiv_version: 1806.03584v1 · doi: 10.48550/arxiv.1806.03584 · pith_short_12: 7ET2GTG5V4GU · pith_short_16: 7ET2GTG5V4GU5UD5 · pith_short_8: 7ET2GTG5

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/7ET2GTG5V4GU5UD5WQV5BJYVRP \
  | 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: f927a34cddaf0d4ed07db42bd0a7158bc05d87b2ade81014f2aa34cd86f77158

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "944bfab02654d06189e4671e1ee250cc3c87e3c6a1325feef23b817b4fb150fc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-06-10T04:29:36Z",
    "title_canon_sha256": "b67a7d2f45eebb5b1f4a5a811e7c36e14890ba63f2a0007ac3ac83aba9b18aa1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.03584",
    "kind": "arxiv",
    "version": 1
  }
}