Pith Number

pith:LCL2I7M3

pith:2019:LCL2I7M32CN7X2TDTO6L2RUCS2

not attested not anchored not stored refs pending

Standardized spectral and radiometric calibration of consumer cameras

Carlos Tapia, Evangelos Spyrakos, Frans Snik, Jaime Zamorano, Klaas Pauly, Norbert Schmidt, Olivier Burggraaff, Sergio Pascual

arxiv:1906.04155 v1 · 2019-06-07 · physics.ins-det · astro-ph.IM · eess.IV · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LCL2I7M32CN7X2TDTO6L2RUCS2}

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	2026-05-17T23:42:41.427118Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5897a47d9bd09bfbea639bbcbd468296abda114e2e937bbea5004c3ffecba48a

Aliases

arxiv: 1906.04155 · arxiv_version: 1906.04155v1 · doi: 10.48550/arxiv.1906.04155 · pith_short_12: LCL2I7M32CN7 · pith_short_16: LCL2I7M32CN7X2TD · pith_short_8: LCL2I7M3

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/LCL2I7M32CN7X2TDTO6L2RUCS2 \
  | 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: 5897a47d9bd09bfbea639bbcbd468296abda114e2e937bbea5004c3ffecba48a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e0805136a08be8a1ef01d2349784138531a7e29d98d8b9274ff0f55790cd773",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "eess.IV",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ins-det",
    "submitted_at": "2019-06-07T13:03:01Z",
    "title_canon_sha256": "f41e8101f1061f9e72ec2baa4bc39612583630e4773c2481452d7c2aa88aeb1e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.04155",
    "kind": "arxiv",
    "version": 1
  }
}