Pith Number

pith:QS4TDZKK

pith:2011:QS4TDZKKORFNSIR5MEJ7BVPBT5

not attested not anchored not stored refs pending

Removing Gaussian Noise by Optimization of Weights in Non-Local Means

Ion Grama, Qiyu Jin, Quansheng Liu

arxiv:1109.5640 v1 · 2011-09-26 · stat.OT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QS4TDZKKORFNSIR5MEJ7BVPBT5}

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	2026-05-18T04:09:37.368379Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84b931e54a744ad9223d6113f0d5e19f6c82bb249d3998768339d09c56b92890

Aliases

arxiv: 1109.5640 · arxiv_version: 1109.5640v1 · doi: 10.48550/arxiv.1109.5640 · pith_short_12: QS4TDZKKORFN · pith_short_16: QS4TDZKKORFNSIR5 · pith_short_8: QS4TDZKK

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/QS4TDZKKORFNSIR5MEJ7BVPBT5 \
  | 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: 84b931e54a744ad9223d6113f0d5e19f6c82bb249d3998768339d09c56b92890

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19c785260d8499cfbe593ea3ab724a38514e528819d4a2274fc43e90bf8f0fe0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.OT",
    "submitted_at": "2011-09-26T17:05:47Z",
    "title_canon_sha256": "4db444f7f11e56b5397765c62f628f1d3a1fbcac6569222783497238a986522d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.5640",
    "kind": "arxiv",
    "version": 1
  }
}