Pith Number

pith:W22OJFA5

pith:2026:W22OJFA5IMXPAMUGXUV4ZE3Y7H

not attested not anchored not stored refs pending

Magnetic Indoor Localization through CNN Regression and Rotation Invariance

Bernd Sch\"aufele, Helge Ros\'e, Ilja Radusch, Konstantin Klipp, Tom Koubek

Rotation-invariant 2D magnetic features let a CNN regress accurate indoor positions without device orientation alignment.

arxiv:2604.22896 v2 · 2026-04-24 · cs.RO · cs.LG

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\usepackage{pith}
\pithnumber{W22OJFA5IMXPAMUGXUV4ZE3Y7H}

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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

2D (Mn, Mg) inputs maintain rotation invariant accuracy and surpass the 3D inputs once rotation exceeds building-specific thresholds for three reference buildings: 0° for Loomis (large), 5° for Talbot (medium), and 6° for CSL (small).

C2weakest assumption

That the chosen rotation-invariant features preserve enough position-specific information from the magnetic field and that the MagPie dataset trajectories represent realistic usage conditions without significant temporal or device variation.

C3one line summary

Rotation-invariant magnetic features (norm and gravity projection) with a dilated CNN enable accurate, orientation-robust indoor position regression on the MagPie dataset.

Receipt and verification

First computed	2026-06-02T02:04:53.465456Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6b4e4941d432ef03286bd2bcc9378f9ec4cbb040c3b87aaa68842ead062fc33

Aliases

arxiv: 2604.22896 · arxiv_version: 2604.22896v2 · doi: 10.48550/arxiv.2604.22896 · pith_short_12: W22OJFA5IMXP · pith_short_16: W22OJFA5IMXPAMUG · pith_short_8: W22OJFA5

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/W22OJFA5IMXPAMUGXUV4ZE3Y7H \
  | 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: b6b4e4941d432ef03286bd2bcc9378f9ec4cbb040c3b87aaa68842ead062fc33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "efa78d0f148ff846bcbc61bce3a505b50462959e5a769592406f5324ffb096d1",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.RO",
    "submitted_at": "2026-04-24T12:06:08Z",
    "title_canon_sha256": "337d12a91f9f987796997adbafbc19b3b87a68d6d3a449f5233b576ffd4fac47"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.22896",
    "kind": "arxiv",
    "version": 2
  }
}