Pith Number

pith:UGCV4HQ4

pith:2012:UGCV4HQ4EUQGUIJOPGQJVM7267

not attested not anchored not stored refs pending

A New Algorithm Based Entropic Threshold for Edge Detection in Images

Mohamed A. El-Sayed

arxiv:1211.2500 v1 · 2012-11-12 · 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{UGCV4HQ4EUQGUIJOPGQJVM7267}

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	2026-05-18T03:41:03.144606Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1855e1e1c25206a212e79a09ab3faf7d81f8a74fde170c333bd2df256956250

Aliases

arxiv: 1211.2500 · arxiv_version: 1211.2500v1 · doi: 10.48550/arxiv.1211.2500 · pith_short_12: UGCV4HQ4EUQG · pith_short_16: UGCV4HQ4EUQGUIJO · pith_short_8: UGCV4HQ4

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/UGCV4HQ4EUQGUIJOPGQJVM7267 \
  | 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: a1855e1e1c25206a212e79a09ab3faf7d81f8a74fde170c333bd2df256956250

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c22396236fb49e4f48b689a8eb15fbfb073560c64e3ec8924de5d4c7658b8b8a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2012-11-12T02:56:08Z",
    "title_canon_sha256": "d48aec3881225b4f6af095410f2ffc0204ea4248a81605cf113904d81b280eda"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.2500",
    "kind": "arxiv",
    "version": 1
  }
}