Pith Number

pith:NHA2CC2Z

pith:2021:NHA2CC2ZAR27OS7SBFXR46FYAM

not attested not anchored not stored refs pending

Image restoration quality assessment based on regional differential information entropy

Chengbin Peng, Jiangjian Xiao, Jiayan Zhuang, Ningyuan Xu, Sichao Ye, Zhiyu Wang

arxiv:2107.03642 v2 · 2021-07-08 · eess.IV · 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{NHA2CC2ZAR27OS7SBFXR46FYAM}

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	2026-07-05T05:19:32.854503Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69c1a10b590475f74bf2096f1e78b8030758d142fc6d8b99ef0a20577857bbb4

Aliases

arxiv: 2107.03642 · arxiv_version: 2107.03642v2 · doi: 10.48550/arxiv.2107.03642 · pith_short_12: NHA2CC2ZAR27 · pith_short_16: NHA2CC2ZAR27OS7S · pith_short_8: NHA2CC2Z

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/NHA2CC2ZAR27OS7SBFXR46FYAM \
  | 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: 69c1a10b590475f74bf2096f1e78b8030758d142fc6d8b99ef0a20577857bbb4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7650c2d10164b51fbce25a77037bb34fafd3b4d98033f3f09cc229060ffd700",
    "cross_cats_sorted": [
      "cs.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.IV",
    "submitted_at": "2021-07-08T07:12:55Z",
    "title_canon_sha256": "3197bc352a29a161627b6aca9682f4174f9b7700a13629cd0565d5df0e272cc5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.03642",
    "kind": "arxiv",
    "version": 2
  }
}