{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:UNON5JMBGEACHMBFLFDAGGBQKZ","short_pith_number":"pith:UNON5JMB","canonical_record":{"source":{"id":"1901.06487","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2019-01-19T09:21:57Z","cross_cats_sorted":[],"title_canon_sha256":"14b4aaf0d1509132f9a50fc0b8c5dca6c3be4ce849ef5dc1b2db433d0842a8c6","abstract_canon_sha256":"afd7d82457a9dce70cf73456e9486bd8fa7e98fdb0a2789f4faa6e6886fc92ec"},"schema_version":"1.0"},"canonical_sha256":"a35cdea581310023b02559460318305667b8718310db8d55bf42df87b7e0b1ea","source":{"kind":"arxiv","id":"1901.06487","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.06487","created_at":"2026-05-17T23:48:55Z"},{"alias_kind":"arxiv_version","alias_value":"1901.06487v2","created_at":"2026-05-17T23:48:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.06487","created_at":"2026-05-17T23:48:55Z"},{"alias_kind":"pith_short_12","alias_value":"UNON5JMBGEAC","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"UNON5JMBGEACHMBF","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"UNON5JMB","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:UNON5JMBGEACHMBFLFDAGGBQKZ","target":"record","payload":{"canonical_record":{"source":{"id":"1901.06487","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2019-01-19T09:21:57Z","cross_cats_sorted":[],"title_canon_sha256":"14b4aaf0d1509132f9a50fc0b8c5dca6c3be4ce849ef5dc1b2db433d0842a8c6","abstract_canon_sha256":"afd7d82457a9dce70cf73456e9486bd8fa7e98fdb0a2789f4faa6e6886fc92ec"},"schema_version":"1.0"},"canonical_sha256":"a35cdea581310023b02559460318305667b8718310db8d55bf42df87b7e0b1ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:48:55.039268Z","signature_b64":"3qS3Muypt3Hk6ez1sfcFZ6uQCulOYRpDs8PY5nSPoyG3ojWPgeL65Y/J0j/n+31iv7WC1HgvWrePE9PiSCWMDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a35cdea581310023b02559460318305667b8718310db8d55bf42df87b7e0b1ea","last_reissued_at":"2026-05-17T23:48:55.038734Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:48:55.038734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.06487","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:48:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I0goQatGK5/SUlZo1Fas6wC0om51PUIF3F/u6bPsTTSKWQu5bnU8JqIjF09ut8L6DOhl+rTLUnPzmz5TJMLSDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T23:34:19.997533Z"},"content_sha256":"460bcd57834ff4b392edcbc9dbaca8e139f5ed245a6b1c62bbbc690aa89f7ee6","schema_version":"1.0","event_id":"sha256:460bcd57834ff4b392edcbc9dbaca8e139f5ed245a6b1c62bbbc690aa89f7ee6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:UNON5JMBGEACHMBFLFDAGGBQKZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Automatic normal orientation in point clouds of building interiors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.GR","authors_text":"Reinhard Klein, Sebastian Ochmann","submitted_at":"2019-01-19T09:21:57Z","abstract_excerpt":"Orienting surface normals correctly and consistently is a fundamental problem in geometry processing. Applications such as visualization, feature detection, and geometry reconstruction often rely on the availability of correctly oriented normals. Many existing approaches for automatic orientation of normals on meshes or point clouds make severe assumptions on the input data or the topology of the underlying object which are not applicable to real-world measurements of urban scenes. In contrast, our approach is specifically tailored to the challenging case of unstructured indoor point cloud sca"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.06487","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:48:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IU8zHIF/a2Uxh9H+pg+8lh4VaIophVvcobcalrdIVAInZMVJCetHgiGpuc9FZq9MQkE0OPhjJlWihJ35gbMQCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T23:34:19.998158Z"},"content_sha256":"02d4332f5253ce5353e74f901b2cc2938cabe589c6fb2a4c874e6e697f543a25","schema_version":"1.0","event_id":"sha256:02d4332f5253ce5353e74f901b2cc2938cabe589c6fb2a4c874e6e697f543a25"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UNON5JMBGEACHMBFLFDAGGBQKZ/bundle.json","state_url":"https://pith.science/pith/UNON5JMBGEACHMBFLFDAGGBQKZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UNON5JMBGEACHMBFLFDAGGBQKZ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-20T23:34:19Z","links":{"resolver":"https://pith.science/pith/UNON5JMBGEACHMBFLFDAGGBQKZ","bundle":"https://pith.science/pith/UNON5JMBGEACHMBFLFDAGGBQKZ/bundle.json","state":"https://pith.science/pith/UNON5JMBGEACHMBFLFDAGGBQKZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UNON5JMBGEACHMBFLFDAGGBQKZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:UNON5JMBGEACHMBFLFDAGGBQKZ","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"afd7d82457a9dce70cf73456e9486bd8fa7e98fdb0a2789f4faa6e6886fc92ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2019-01-19T09:21:57Z","title_canon_sha256":"14b4aaf0d1509132f9a50fc0b8c5dca6c3be4ce849ef5dc1b2db433d0842a8c6"},"schema_version":"1.0","source":{"id":"1901.06487","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.06487","created_at":"2026-05-17T23:48:55Z"},{"alias_kind":"arxiv_version","alias_value":"1901.06487v2","created_at":"2026-05-17T23:48:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.06487","created_at":"2026-05-17T23:48:55Z"},{"alias_kind":"pith_short_12","alias_value":"UNON5JMBGEAC","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"UNON5JMBGEACHMBF","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"UNON5JMB","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:02d4332f5253ce5353e74f901b2cc2938cabe589c6fb2a4c874e6e697f543a25","target":"graph","created_at":"2026-05-17T23:48:55Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Orienting surface normals correctly and consistently is a fundamental problem in geometry processing. Applications such as visualization, feature detection, and geometry reconstruction often rely on the availability of correctly oriented normals. Many existing approaches for automatic orientation of normals on meshes or point clouds make severe assumptions on the input data or the topology of the underlying object which are not applicable to real-world measurements of urban scenes. In contrast, our approach is specifically tailored to the challenging case of unstructured indoor point cloud sca","authors_text":"Reinhard Klein, Sebastian Ochmann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2019-01-19T09:21:57Z","title":"Automatic normal orientation in point clouds of building interiors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.06487","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:460bcd57834ff4b392edcbc9dbaca8e139f5ed245a6b1c62bbbc690aa89f7ee6","target":"record","created_at":"2026-05-17T23:48:55Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"afd7d82457a9dce70cf73456e9486bd8fa7e98fdb0a2789f4faa6e6886fc92ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.GR","submitted_at":"2019-01-19T09:21:57Z","title_canon_sha256":"14b4aaf0d1509132f9a50fc0b8c5dca6c3be4ce849ef5dc1b2db433d0842a8c6"},"schema_version":"1.0","source":{"id":"1901.06487","kind":"arxiv","version":2}},"canonical_sha256":"a35cdea581310023b02559460318305667b8718310db8d55bf42df87b7e0b1ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a35cdea581310023b02559460318305667b8718310db8d55bf42df87b7e0b1ea","first_computed_at":"2026-05-17T23:48:55.038734Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:55.038734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3qS3Muypt3Hk6ez1sfcFZ6uQCulOYRpDs8PY5nSPoyG3ojWPgeL65Y/J0j/n+31iv7WC1HgvWrePE9PiSCWMDg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:55.039268Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.06487","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:460bcd57834ff4b392edcbc9dbaca8e139f5ed245a6b1c62bbbc690aa89f7ee6","sha256:02d4332f5253ce5353e74f901b2cc2938cabe589c6fb2a4c874e6e697f543a25"],"state_sha256":"a947f290248aefd271315bbd1855f1f7835cfb6cc225f32951c20a2423f90876"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AOEK5I2YQUTmU6roue97T/nPtUn1nidbyO8oeuUVwUJXYMBSC+4mnS6kQNq9PNdK8v/6cxjgRm7kMlGwWLovAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T23:34:20.001655Z","bundle_sha256":"61a498d2e7c1592b185774ed39d1de6becc07edb5c04619c385b42c7a2542b42"}}