Pith Number

pith:2UBOGVWP

pith:2021:2UBOGVWPOFENAWZB7JIHJQVUCE

not attested not anchored not stored refs pending

Contour Loss for Instance Segmentation via k-step Distance Transformation Image

Kunfeng Wang, Shuxiao Li, Xiaolong Guo, Xiaosong Lan

arxiv:2102.10854 v1 · 2021-02-22 · 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{2UBOGVWPOFENAWZB7JIHJQVUCE}

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	2026-07-05T02:17:02.157714Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d502e356cf7148d05b21fa5074c2b4110ef700098d9e49e4e176283ce5acad21

Aliases

arxiv: 2102.10854 · arxiv_version: 2102.10854v1 · doi: 10.48550/arxiv.2102.10854 · pith_short_12: 2UBOGVWPOFEN · pith_short_16: 2UBOGVWPOFENAWZB · pith_short_8: 2UBOGVWP

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/2UBOGVWPOFENAWZB7JIHJQVUCE \
  | 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: d502e356cf7148d05b21fa5074c2b4110ef700098d9e49e4e176283ce5acad21

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "efc2ce0480f7c60216b6579ba4ab33e45ec2130ca2bb100dd6a523f9bda47efb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-02-22T09:35:35Z",
    "title_canon_sha256": "2f010a6d858f2a574f778aaf3ebcf1fa678e0a5b9c6b3ef6c450985e2563b60a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2102.10854",
    "kind": "arxiv",
    "version": 1
  }
}