Pith Number

pith:AZTNGWFG

pith:2019:AZTNGWFGEUR4KXOFKTHJVYHFWO

not attested not anchored not stored refs pending

A New Technique of Camera Calibration: A Geometric Approach Based on Principal Lines

Ardian Umam, Chih-Hui Ho, HsinYi Chen, Jen-Hui Chuang, Jenq-Neng Hwang, Mu-Tien Lu, Tai-An Chen

arxiv:1908.06539 v1 · 2019-08-18 · 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{AZTNGWFGEUR4KXOFKTHJVYHFWO}

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	2026-07-04T23:58:16.956724Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0666d358a62523c55dc554ce9ae0e5b3887ed4fb55e1c3ff3f7da58025cb705e

Aliases

arxiv: 1908.06539 · arxiv_version: 1908.06539v1 · doi: 10.48550/arxiv.1908.06539 · pith_short_12: AZTNGWFGEUR4 · pith_short_16: AZTNGWFGEUR4KXOF · pith_short_8: AZTNGWFG

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/AZTNGWFGEUR4KXOFKTHJVYHFWO \
  | 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: 0666d358a62523c55dc554ce9ae0e5b3887ed4fb55e1c3ff3f7da58025cb705e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "505717679cf18a4ab51d65f5d31620e6f13d6d467ce54f18df573850ee716536",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-08-18T23:28:05Z",
    "title_canon_sha256": "08594c52113cdd68f1206470505712a4f79c71a0d666ed96e0fa67a51fc0b5cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06539",
    "kind": "arxiv",
    "version": 1
  }
}