Pith Number

pith:2QYC5H6K

pith:2019:2QYC5H6KQ7I2PDBUNZS4FN2TA2

not attested not anchored not stored refs pending

Context-Aware Image Matting for Simultaneous Foreground and Alpha Estimation

Feng Liu, Qiqi Hou

arxiv:1909.09725 v2 · 2019-09-20 · 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{2QYC5H6KQ7I2PDBUNZS4FN2TA2}

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	2026-07-05T00:09:26.766394Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4302e9fca87d1a78c346e65c2b75306b88d3fd0c068e24b38c9284758e2d9f0

Aliases

arxiv: 1909.09725 · arxiv_version: 1909.09725v2 · doi: 10.48550/arxiv.1909.09725 · pith_short_12: 2QYC5H6KQ7I2 · pith_short_16: 2QYC5H6KQ7I2PDBU · pith_short_8: 2QYC5H6K

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/2QYC5H6KQ7I2PDBUNZS4FN2TA2 \
  | 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: d4302e9fca87d1a78c346e65c2b75306b88d3fd0c068e24b38c9284758e2d9f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "95c73ea9a996bcf645070e3968ddb32aec71a49c3f30021d5352c2a83200b725",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-09-20T21:36:30Z",
    "title_canon_sha256": "24b202df22d64319c5a98e9be323fb0570035e72cc0ed207bf7bf98ed559cac8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.09725",
    "kind": "arxiv",
    "version": 2
  }
}