Pith Number

pith:NMXAYK3N

pith:2026:NMXAYK3NTGOHEIQIE6UPZMNQHO

not attested not anchored not stored refs pending

Radar-Camera BEV Multi-Task Learning with Cross-Task Attention Bridge for Joint 3D Detection and Segmentation

Ahmet \.Inan\c{c}, \"Ozg\"ur Erkent

A bidirectional attention bridge in shared BEV space lets detection and segmentation exchange features, raising segmentation accuracy on seven classes while detection stays neutral.

arxiv:2604.12918 v2 · 2026-04-14 · cs.CV

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\usepackage{pith}
\pithnumber{NMXAYK3NTGOHEIQIE6UPZMNQHO}

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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.

Claims

C1strongest claim

CTAB is a bidirectional module that exchanges features between detection and segmentation branches via multi-scale deformable attention in shared BEV space.

C2weakest assumption

That detection and segmentation features are sufficiently complementary and that attention-based transfer will not introduce noise or task interference that degrades either head.

C3one line summary

CTAB exchanges features between detection and segmentation via multi-scale deformable attention in BEV space, yielding segmentation gains on 7 nuScenes classes at neutral detection cost.

Receipt and verification

First computed	2026-05-27T02:06:14.051020Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6b2e0c2b6d999c72220827a8fcb1b03ba3110ed4cd1b6353c43a648ddcf241ad

Aliases

arxiv: 2604.12918 · arxiv_version: 2604.12918v2 · doi: 10.48550/arxiv.2604.12918 · pith_short_12: NMXAYK3NTGOH · pith_short_16: NMXAYK3NTGOHEIQI · pith_short_8: NMXAYK3N

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/NMXAYK3NTGOHEIQIE6UPZMNQHO \
  | 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: 6b2e0c2b6d999c72220827a8fcb1b03ba3110ed4cd1b6353c43a648ddcf241ad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a1cfa7ea5ac46f875e8f0b3f3a4f9c2559ef902b07ee8211fdb590f8da3e268",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-04-14T16:00:53Z",
    "title_canon_sha256": "30ecc991678a7bbf4e1f7a2ef0bcb08c329a8c309b533be728123c1ea8ef161d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.12918",
    "kind": "arxiv",
    "version": 2
  }
}