Pith Number

pith:FLFOQOLV

pith:2026:FLFOQOLVC7PEHBFAZCCQ7X7IJB

not attested not anchored not stored refs pending

Robust Lightweight Crack Classification for Real-Time UAV Bridge Inspection

Haisheng Li, Jiandong Wang, Kaichen Ma, Luming Yang, Weijie Li, Wei Li

Lightweight CNN with attention and focal loss detects bridge cracks at 825 FPS for UAV inspections.

arxiv:2604.27617 v2 · 2026-04-30 · cs.CV · cs.AI

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Claims

C1strongest claim

Experiments on the SDNET2018 bridge deck dataset show that the proposed method achieves an inference speed of 825 FPS with only 11.21M parameters and 1.82G FLOPs. Compared with the baseline model, the complete framework improves the F1-score by 2.51% and recall by 3.95%.

C2weakest assumption

That the directed robust augmentation strategy based on inspection-scene priors, when combined with CBAM and Focal Loss, will produce robust performance gains that generalize from the SDNET2018 dataset to varied real-world UAV flight conditions, lighting, and bridge types not represented in the test set.

C3one line summary

A lightweight CNN framework with CBAM, targeted augmentation, and focal loss runs at 825 FPS on the SDNET2018 dataset while improving F1-score by 2.51% and recall by 3.95% over baseline for bridge crack detection.

Receipt and verification

First computed	2026-06-01T01:02:40.937274Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2acae8397517de4384a0c8850fdfe8484b53d98ba14673d7a2309175af3ae0ba

Aliases

arxiv: 2604.27617 · arxiv_version: 2604.27617v2 · doi: 10.48550/arxiv.2604.27617 · pith_short_12: FLFOQOLVC7PE · pith_short_16: FLFOQOLVC7PEHBFA · pith_short_8: FLFOQOLV

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curl -sH 'Accept: application/ld+json' https://pith.science/pith/FLFOQOLVC7PEHBFAZCCQ7X7IJB \
  | 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: 2acae8397517de4384a0c8850fdfe8484b53d98ba14673d7a2309175af3ae0ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "259fb75bfd695badf4071735ad3ff35e902462b5163125ff863b251557a161bc",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-04-30T09:08:41Z",
    "title_canon_sha256": "c26977d1713e6fdc85dbae7996a8fad5b3a3b59630f2d91c98ffc2c85eaca0b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.27617",
    "kind": "arxiv",
    "version": 2
  }
}