Pith Number

pith:QGTAKB3J

pith:2019:QGTAKB3JEYIDYXMVRBEPZ7TUA4

not attested not anchored not stored refs pending

Learning Perspective Undistortion of Portraits

Ari Shapiro, Chloe LeGendre, Hao Li, Jun Xing, Tianye Li, Weikai Chen, Xinglei Ren, Yajie Zhao, Zeng Huang

arxiv:1905.07515 v1 · 2019-05-18 · cs.CV · cs.GR · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QGTAKB3JEYIDYXMVRBEPZ7TUA4}

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	2026-05-17T23:45:49.487761Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81a605076926103c5d958848fcfe740727432cc37fcf45bad86f3915769af550

Aliases

arxiv: 1905.07515 · arxiv_version: 1905.07515v1 · doi: 10.48550/arxiv.1905.07515 · pith_short_12: QGTAKB3JEYID · pith_short_16: QGTAKB3JEYIDYXMV · pith_short_8: QGTAKB3J

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/QGTAKB3JEYIDYXMVRBEPZ7TUA4 \
  | 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: 81a605076926103c5d958848fcfe740727432cc37fcf45bad86f3915769af550

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36a04faafe903a8bda5ee5eaf7bf4013111b9cc50ebdbe6d703b815972ddbbc3",
    "cross_cats_sorted": [
      "cs.GR",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-05-18T01:08:47Z",
    "title_canon_sha256": "76634a67a704af78df2344026b43a062b28a4d578435e572a25fa80406403687"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.07515",
    "kind": "arxiv",
    "version": 1
  }
}