{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:BZSTNAH3YULZULOQB2VTKMGX5O","short_pith_number":"pith:BZSTNAH3","canonical_record":{"source":{"id":"1810.01151","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-02T10:06:13Z","cross_cats_sorted":[],"title_canon_sha256":"2b7d5c838e259d56d22d779c87d9a04d2fc612fdc7cb2844d6dce2cad083a708","abstract_canon_sha256":"92e9b3342ab172e0dc912b8af04eeff96f0f56e44064c4fe863fe3f973dfee9b"},"schema_version":"1.0"},"canonical_sha256":"0e653680fbc5179a2dd00eab3530d7ebaa5a6f22235f67990717926cbaa08e37","source":{"kind":"arxiv","id":"1810.01151","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.01151","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"arxiv_version","alias_value":"1810.01151v2","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.01151","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"pith_short_12","alias_value":"BZSTNAH3YULZ","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"BZSTNAH3YULZULOQ","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"BZSTNAH3","created_at":"2026-07-05T00:27:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:BZSTNAH3YULZULOQB2VTKMGX5O","target":"record","payload":{"canonical_record":{"source":{"id":"1810.01151","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-02T10:06:13Z","cross_cats_sorted":[],"title_canon_sha256":"2b7d5c838e259d56d22d779c87d9a04d2fc612fdc7cb2844d6dce2cad083a708","abstract_canon_sha256":"92e9b3342ab172e0dc912b8af04eeff96f0f56e44064c4fe863fe3f973dfee9b"},"schema_version":"1.0"},"canonical_sha256":"0e653680fbc5179a2dd00eab3530d7ebaa5a6f22235f67990717926cbaa08e37","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:27:14.413364Z","signature_b64":"zhQo64s1jQnBO7OnhyRdwjSF4TA4CzREVarOrffKGG9YBBnoMzAMc8PLImpnDglawgMpGMxrt/tl8j+9MFNRDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0e653680fbc5179a2dd00eab3530d7ebaa5a6f22235f67990717926cbaa08e37","last_reissued_at":"2026-07-05T00:27:14.412754Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:27:14.412754Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.01151","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":"2026-07-05T00:27:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+ZJEpapIOHnQzACbKK8nd8v1DMw+A6QIhFeD2RQOIaBa/ZNexFOxMJCsGP4gZrU6thm+ipEg9b7WM+E1wkD0Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T08:53:09.900449Z"},"content_sha256":"7356daf3e846880178cb4baf1aee35fd298e86831a46fcb1c335b2e17397aecf","schema_version":"1.0","event_id":"sha256:7356daf3e846880178cb4baf1aee35fd298e86831a46fcb1c335b2e17397aecf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:BZSTNAH3YULZULOQB2VTKMGX5O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Know What Your Neighbors Do: 3D Semantic Segmentation of Point Clouds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Bastian Leibe, Francis Engelmann, Jonas Schult, Theodora Kontogianni","submitted_at":"2018-10-02T10:06:13Z","abstract_excerpt":"In this paper, we present a deep learning architecture which addresses the problem of 3D semantic segmentation of unstructured point clouds. Compared to previous work, we introduce grouping techniques which define point neighborhoods in the initial world space and the learned feature space. Neighborhoods are important as they allow to compute local or global point features depending on the spatial extend of the neighborhood. Additionally, we incorporate dedicated loss functions to further structure the learned point feature space: the pairwise distance loss and the centroid loss. We show how t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.01151","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1810.01151/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:27:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"937IcZ5qF7wONjBYcWlEcGT8O+Oq+viUxkboWE6KhCra7pYiyKQ/2TWSzVzdh37EX1hvI+7FzAjgaaf0PAMXBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T08:53:09.900888Z"},"content_sha256":"873a152c95fc16bed9278328ee12885f960113c25bb2ba794d538b8cc7d8baea","schema_version":"1.0","event_id":"sha256:873a152c95fc16bed9278328ee12885f960113c25bb2ba794d538b8cc7d8baea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BZSTNAH3YULZULOQB2VTKMGX5O/bundle.json","state_url":"https://pith.science/pith/BZSTNAH3YULZULOQB2VTKMGX5O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BZSTNAH3YULZULOQB2VTKMGX5O/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":"2026-07-06T08:53:09Z","links":{"resolver":"https://pith.science/pith/BZSTNAH3YULZULOQB2VTKMGX5O","bundle":"https://pith.science/pith/BZSTNAH3YULZULOQB2VTKMGX5O/bundle.json","state":"https://pith.science/pith/BZSTNAH3YULZULOQB2VTKMGX5O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BZSTNAH3YULZULOQB2VTKMGX5O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:BZSTNAH3YULZULOQB2VTKMGX5O","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":"92e9b3342ab172e0dc912b8af04eeff96f0f56e44064c4fe863fe3f973dfee9b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-02T10:06:13Z","title_canon_sha256":"2b7d5c838e259d56d22d779c87d9a04d2fc612fdc7cb2844d6dce2cad083a708"},"schema_version":"1.0","source":{"id":"1810.01151","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.01151","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"arxiv_version","alias_value":"1810.01151v2","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.01151","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"pith_short_12","alias_value":"BZSTNAH3YULZ","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"BZSTNAH3YULZULOQ","created_at":"2026-07-05T00:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"BZSTNAH3","created_at":"2026-07-05T00:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:873a152c95fc16bed9278328ee12885f960113c25bb2ba794d538b8cc7d8baea","target":"graph","created_at":"2026-07-05T00:27:14Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1810.01151/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we present a deep learning architecture which addresses the problem of 3D semantic segmentation of unstructured point clouds. Compared to previous work, we introduce grouping techniques which define point neighborhoods in the initial world space and the learned feature space. Neighborhoods are important as they allow to compute local or global point features depending on the spatial extend of the neighborhood. Additionally, we incorporate dedicated loss functions to further structure the learned point feature space: the pairwise distance loss and the centroid loss. We show how t","authors_text":"Bastian Leibe, Francis Engelmann, Jonas Schult, Theodora Kontogianni","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-02T10:06:13Z","title":"Know What Your Neighbors Do: 3D Semantic Segmentation of Point Clouds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.01151","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":"sha256:7356daf3e846880178cb4baf1aee35fd298e86831a46fcb1c335b2e17397aecf","target":"record","created_at":"2026-07-05T00:27:14Z","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":"92e9b3342ab172e0dc912b8af04eeff96f0f56e44064c4fe863fe3f973dfee9b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-02T10:06:13Z","title_canon_sha256":"2b7d5c838e259d56d22d779c87d9a04d2fc612fdc7cb2844d6dce2cad083a708"},"schema_version":"1.0","source":{"id":"1810.01151","kind":"arxiv","version":2}},"canonical_sha256":"0e653680fbc5179a2dd00eab3530d7ebaa5a6f22235f67990717926cbaa08e37","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0e653680fbc5179a2dd00eab3530d7ebaa5a6f22235f67990717926cbaa08e37","first_computed_at":"2026-07-05T00:27:14.412754Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:27:14.412754Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zhQo64s1jQnBO7OnhyRdwjSF4TA4CzREVarOrffKGG9YBBnoMzAMc8PLImpnDglawgMpGMxrt/tl8j+9MFNRDA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:27:14.413364Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.01151","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7356daf3e846880178cb4baf1aee35fd298e86831a46fcb1c335b2e17397aecf","sha256:873a152c95fc16bed9278328ee12885f960113c25bb2ba794d538b8cc7d8baea"],"state_sha256":"f8106b2917931c901c734803d652303fd95731b3a959d4a5a09ff2e749f8797a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7aVg/drfHPmfkeF878cKFRmgnte63UiscWqzVk9y2bocAsmLDABg+vqRENDqYIam/UbalTyAFSKOBw6Z1N8xAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T08:53:09.903227Z","bundle_sha256":"065473d76ccc8f7a699915598c331db2968648a2a3049fafd74b8eafeffbf67b"}}