Pith Number

pith:KWFQCV6S

pith:2015:KWFQCV6ST2IFM3A42G2JQFYOS3

not attested not anchored not stored refs pending

SIFT Vs SURF: Quantifying the Variation in Transformations

Siddharth Srivastava

arxiv:1504.06740 v1 · 2015-04-25 · 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{KWFQCV6ST2IFM3A42G2JQFYOS3}

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	2026-05-18T02:17:44.479356Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

558b0157d29e90566c1cd1b498170e96d368e37150bf3d5df36c9b7cd4721b0c

Aliases

arxiv: 1504.06740 · arxiv_version: 1504.06740v1 · doi: 10.48550/arxiv.1504.06740 · pith_short_12: KWFQCV6ST2IF · pith_short_16: KWFQCV6ST2IFM3A4 · pith_short_8: KWFQCV6S

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/KWFQCV6ST2IFM3A42G2JQFYOS3 \
  | 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: 558b0157d29e90566c1cd1b498170e96d368e37150bf3d5df36c9b7cd4721b0c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6801e3e219ef6bff6ea0ef3eef31f70a49e805873d94a781b1ed7a87f8c7e3cd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2015-04-25T15:26:38Z",
    "title_canon_sha256": "12a8c77604f8f0d404b3cc6928cc459cc6b2ab161c855a4cb34403c6b10d87f4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.06740",
    "kind": "arxiv",
    "version": 1
  }
}