Pith Number

pith:M6T2WLTQ

pith:2026:M6T2WLTQJO6K4LA6SP3IBXMGUC

not attested not anchored not stored refs pending

EnsemHalDet: Robust VLM Hallucination Detection via Ensemble of Internal State Detectors

Kei Harada, Ryuhei Miyazato, Shunsuke Kitada

EnsemHalDet improves hallucination detection in vision-language models by ensembling detectors from multiple internal states.

arxiv:2604.02784 v2 · 2026-04-03 · cs.CV · cs.CL

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\usepackage{pith}
\pithnumber{M6T2WLTQJO6K4LA6SP3IBXMGUC}

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Record completeness

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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.

Claims

C1strongest claim

EnsemHalDet consistently outperforms prior methods and single-detector models in terms of AUC across multiple VQA datasets and VLMs.

C2weakest assumption

That the chosen internal representations (attention outputs and hidden states) supply sufficiently diverse and complementary hallucination signals that can be combined effectively by ensemble learning.

C3one line summary

EnsemHalDet improves hallucination detection in VLMs by ensembling independent detectors on diverse internal states, yielding higher AUC than single-detector baselines on VQA datasets.

Receipt and verification

First computed	2026-05-20T01:05:12.453408Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

67a7ab2e704bbcae2c1e93f680dd86a09558056bd61b5ddb2dc381396fca99b3

Aliases

arxiv: 2604.02784 · arxiv_version: 2604.02784v2 · doi: 10.48550/arxiv.2604.02784 · pith_short_12: M6T2WLTQJO6K · pith_short_16: M6T2WLTQJO6K4LA6 · pith_short_8: M6T2WLTQ

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/M6T2WLTQJO6K4LA6SP3IBXMGUC \
  | 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: 67a7ab2e704bbcae2c1e93f680dd86a09558056bd61b5ddb2dc381396fca99b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "738c55bb07479d179d1811524fbd914f228950bf16dadee89e4261c309996b93",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-04-03T06:48:27Z",
    "title_canon_sha256": "699cb3718481908c167998b5c43a73505704b40e97d434ac6fc3880162b41adf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.02784",
    "kind": "arxiv",
    "version": 2
  }
}