Pith Number

pith:PE4N3SOT

pith:2018:PE4N3SOTZOVHZJ6JOHISYRLQL7

not attested not anchored not stored refs pending

A Robust Color Edge Detection Algorithm Based on Quaternion Hardy Filter

Kit Ian Kou, Wenshan Bi Dong Cheng Wankai Liu

arxiv:1807.10586 v3 · 2018-07-17 · cs.CV · 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{PE4N3SOTZOVHZJ6JOHISYRLQL7}

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	2026-07-05T02:04:01.864040Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7938ddc9d3cbaa7ca7c971d12c45705ffd4885c048194cc554bc39eb444e8d78

Aliases

arxiv: 1807.10586 · arxiv_version: 1807.10586v3 · doi: 10.48550/arxiv.1807.10586 · pith_short_12: PE4N3SOTZOVH · pith_short_16: PE4N3SOTZOVHZJ6J · pith_short_8: PE4N3SOT

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/PE4N3SOTZOVHZJ6JOHISYRLQL7 \
  | 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: 7938ddc9d3cbaa7ca7c971d12c45705ffd4885c048194cc554bc39eb444e8d78

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67181d76a04191044fd4ea55e68c82e8b41b2dae5f2f178a76cabb615b850208",
    "cross_cats_sorted": [
      "eess.IV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2018-07-17T14:02:35Z",
    "title_canon_sha256": "d6f7effe59b09b9c4793b32c63068e1bd27ccb501cd93dab60011557f80d58e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.10586",
    "kind": "arxiv",
    "version": 3
  }
}