Pith Number

pith:CZY5HIM5

pith:2019:CZY5HIM57VNNYFDBBACWCQSWW3

not attested not anchored not stored refs pending

An image structure model for exact edge detection

Alessandro Dal Palu'

arxiv:1904.09659 v1 · 2019-04-21 · 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{CZY5HIM57VNNYFDBBACWCQSWW3}

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	2026-05-17T23:48:03.702073Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1671d3a19dfd5adc14610805614256b6ca82e456250491d4d3fd1db64e03b582

Aliases

arxiv: 1904.09659 · arxiv_version: 1904.09659v1 · doi: 10.48550/arxiv.1904.09659 · pith_short_12: CZY5HIM57VNN · pith_short_16: CZY5HIM57VNNYFDB · pith_short_8: CZY5HIM5

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/CZY5HIM57VNNYFDBBACWCQSWW3 \
  | 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: 1671d3a19dfd5adc14610805614256b6ca82e456250491d4d3fd1db64e03b582

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "105a0a4df6e17438eaffce20bab79ad89416d75ff9257fcc4f1c11a1013abf59",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-04-21T21:09:47Z",
    "title_canon_sha256": "ce3a4a1ea0d300a7a08219f001c441fa21380d567c8a5fce82c1566e9e8f8fd0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.09659",
    "kind": "arxiv",
    "version": 1
  }
}