Pith Number

pith:HD356HSX

pith:2012:HD356HSX4Q4BYH4JTY42RJQGX6

not attested not anchored not stored refs pending

New Edge Detection Technique based on the Shannon Entropy in Gray Level Images

Mohamed A. El-Sayed, Tarek Abd-El Hafeez

arxiv:1211.2502 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{HD356HSX4Q4BYH4JTY42RJQGX6}

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	2026-05-18T03:41:03.127546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

38f7df1e57e4381c1f899e39a8a606bfad7d4b0ece6cdeade4b2166efd81e732

Aliases

arxiv: 1211.2502 · arxiv_version: 1211.2502v1 · doi: 10.48550/arxiv.1211.2502 · pith_short_12: HD356HSX4Q4B · pith_short_16: HD356HSX4Q4BYH4J · pith_short_8: HD356HSX

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/HD356HSX4Q4BYH4JTY42RJQGX6 \
  | 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: 38f7df1e57e4381c1f899e39a8a606bfad7d4b0ece6cdeade4b2166efd81e732

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f2261a48d55d51a748997dff375ef8b5fb27a2c53229eecd9f306729a062e60",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2012-11-12T03:06:18Z",
    "title_canon_sha256": "df245da8a116b198efad2e763294e9967f87b1ad370e870873c1dd0b8fa07467"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.2502",
    "kind": "arxiv",
    "version": 1
  }
}