Pith Number

pith:ESAJ3VM2

pith:2018:ESAJ3VM2RPMVWDELL373LETIIZ

not attested not anchored not stored refs pending

Determining ellipses from low-resolution images with a comprehensive image formation model

Wojciech Chojnacki, Zygmunt L. Szpak

arxiv:1807.06814 v3 · 2018-07-18 · 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{ESAJ3VM2RPMVWDELL373LETIIZ}

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	2026-05-17T23:55:20.307402Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

24809dd59a8bd95b0c8b5effb59268466b00393946c3d30c8106ceeb50c5ab03

Aliases

arxiv: 1807.06814 · arxiv_version: 1807.06814v3 · doi: 10.48550/arxiv.1807.06814 · pith_short_12: ESAJ3VM2RPMV · pith_short_16: ESAJ3VM2RPMVWDEL · pith_short_8: ESAJ3VM2

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/ESAJ3VM2RPMVWDELL373LETIIZ \
  | 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: 24809dd59a8bd95b0c8b5effb59268466b00393946c3d30c8106ceeb50c5ab03

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28f11d6048f94886d8c2d4c12c933a9cd0db913309c8c0c547f9d2f6ddb1dae0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-07-18T08:23:34Z",
    "title_canon_sha256": "ab4b7c12ea5dc534bdef3986acdae17d3beaf60af5da97c818fe434a103aad03"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.06814",
    "kind": "arxiv",
    "version": 3
  }
}