Pith Number

pith:JIHZVIUE

pith:2018:JIHZVIUEHCAMQXB35FBGKRTTWF

not attested not anchored not stored refs pending

A fast minimal solver for absolute camera pose with unknown focal length and radial distortion from four planar points

Magnus Oskarsson

arxiv:1805.10705 v2 · 2018-05-27 · 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{JIHZVIUEHCAMQXB35FBGKRTTWF}

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	2026-05-18T00:14:05.969477Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4a0f9aa2843880c85c3be942654673b1630c639408bc65d42f2409517d802437

Aliases

arxiv: 1805.10705 · arxiv_version: 1805.10705v2 · doi: 10.48550/arxiv.1805.10705 · pith_short_12: JIHZVIUEHCAM · pith_short_16: JIHZVIUEHCAMQXB3 · pith_short_8: JIHZVIUE

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/JIHZVIUEHCAMQXB35FBGKRTTWF \
  | 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: 4a0f9aa2843880c85c3be942654673b1630c639408bc65d42f2409517d802437

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e4baab7c9920b5567bb20d23e8e8f8390ba46076075b49aff1e33dc77fff4d09",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-05-27T22:53:21Z",
    "title_canon_sha256": "13676d0f7ffea01fcf01aa6d9ae99d398d367433f4f118de5f6c1cf1697d3e4d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.10705",
    "kind": "arxiv",
    "version": 2
  }
}