Pith Number

pith:7U2TLZPH

pith:2015:7U2TLZPHAQ4EBKM4JXYVLU6AZ4

not attested not anchored not stored refs pending

Hardware based Scale- and Rotation-Invariant Feature Extraction: A Retrospective Analysis and Future Directions

Adrian F. Clark, Klaus D. McDonald-Maier, Shoaib Ehsan

arxiv:1504.07962 v1 · 2015-04-29 · 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{7U2TLZPHAQ4EBKM4JXYVLU6AZ4}

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	2026-05-18T02:17:25.094026Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd3535e5e7043840a99c4df155d3c0cf2d4206203de526f4dd7381cd709fc33e

Aliases

arxiv: 1504.07962 · arxiv_version: 1504.07962v1 · doi: 10.48550/arxiv.1504.07962 · pith_short_12: 7U2TLZPHAQ4E · pith_short_16: 7U2TLZPHAQ4EBKM4 · pith_short_8: 7U2TLZPH

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/7U2TLZPHAQ4EBKM4JXYVLU6AZ4 \
  | 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: fd3535e5e7043840a99c4df155d3c0cf2d4206203de526f4dd7381cd709fc33e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19d1e1e1b7446742a1719bb1d56c3c39993cbb525d6ffa2bc6d252e0f8bc5c32",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2015-04-29T18:52:37Z",
    "title_canon_sha256": "dca228a1ed11af6aa98b69d8e0781fcf325d6d9398d80acaad880aacbde75c0a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.07962",
    "kind": "arxiv",
    "version": 1
  }
}