Pith Number

pith:HT72X6HJ

pith:2017:HT72X6HJJCPM2DBJZSHWJEDLBC

not attested not anchored not stored refs pending

Speeding up the K\"ohler's method of contrast thresholding

Guillaume Noyel (IPRI, SIGPH@iPRI)

arxiv:1707.05062 v2 · 2017-07-17 · cs.CV · cs.CC · cs.DC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HT72X6HJJCPM2DBJZSHWJEDLBC}

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	2026-05-17T23:47:52.987275Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3cffabf8e9489ecd0c29cc8f64906b08bed1696d03d97609503ff1f35be65d70

Aliases

arxiv: 1707.05062 · arxiv_version: 1707.05062v2 · doi: 10.48550/arxiv.1707.05062 · pith_short_12: HT72X6HJJCPM · pith_short_16: HT72X6HJJCPM2DBJ · pith_short_8: HT72X6HJ

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/HT72X6HJJCPM2DBJZSHWJEDLBC \
  | 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: 3cffabf8e9489ecd0c29cc8f64906b08bed1696d03d97609503ff1f35be65d70

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "da757ffe2d97b55f92534439ef089659434cc5a1be47889e5f7b8641856eecad",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2017-07-17T09:41:04Z",
    "title_canon_sha256": "cb191bc0857f5bc655d4c3254d1d4722450fd289f9583e0ede591636ad131aaf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1707.05062",
    "kind": "arxiv",
    "version": 2
  }
}