Pith Number

pith:TKSTV2V4

pith:2018:TKSTV2V4NLZ34OHKJKBBOSSEGU

not attested not anchored not stored refs pending

Predicting Encoded Picture Quality in Two Steps is a Better Way

Alan C. Bovik, Christos G. Bampis, Praful Gupta, Xiangxu Yu

arxiv:1801.02016 v2 · 2018-01-06 · eess.IV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TKSTV2V4NLZ34OHKJKBBOSSEGU}

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	2026-05-18T00:23:58.658020Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9aa53aeabc6af3be38ea4a82174a4435334bc81683de8154eed089af576e72ec

Aliases

arxiv: 1801.02016 · arxiv_version: 1801.02016v2 · doi: 10.48550/arxiv.1801.02016 · pith_short_12: TKSTV2V4NLZ3 · pith_short_16: TKSTV2V4NLZ34OHK · pith_short_8: TKSTV2V4

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/TKSTV2V4NLZ34OHKJKBBOSSEGU \
  | 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: 9aa53aeabc6af3be38ea4a82174a4435334bc81683de8154eed089af576e72ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9da36ec6d408ae3ec64d8fedbc9d8a3fc666fce108df0ec7f727e9322283addb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.IV",
    "submitted_at": "2018-01-06T14:01:05Z",
    "title_canon_sha256": "9d30adb371a5eaab22a7bf5ddc4f787167ff20eba794a867f3be8a4f407bec56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.02016",
    "kind": "arxiv",
    "version": 2
  }
}