{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:B55BXGQXAZ5ZKPW2ZGXJE6MKFN","short_pith_number":"pith:B55BXGQX","canonical_record":{"source":{"id":"2505.24475","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-30T11:23:16Z","cross_cats_sorted":[],"title_canon_sha256":"6317f81bf2c5dccb9a13ce24190519b7445dfd3a2db14dc940fea1b2c0f9d2b9","abstract_canon_sha256":"384f98a95f7c85c2ef228a1e68bc7847fa734e25bc13d849cf00ffbe6ceb350b"},"schema_version":"1.0"},"canonical_sha256":"0f7a1b9a17067b953edac9ae92798a2b528239f1239703e963500a6a3df5194c","source":{"kind":"arxiv","id":"2505.24475","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.24475","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"arxiv_version","alias_value":"2505.24475v1","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.24475","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"pith_short_12","alias_value":"B55BXGQXAZ5Z","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"pith_short_16","alias_value":"B55BXGQXAZ5ZKPW2","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"pith_short_8","alias_value":"B55BXGQX","created_at":"2026-07-05T11:12:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:B55BXGQXAZ5ZKPW2ZGXJE6MKFN","target":"record","payload":{"canonical_record":{"source":{"id":"2505.24475","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-30T11:23:16Z","cross_cats_sorted":[],"title_canon_sha256":"6317f81bf2c5dccb9a13ce24190519b7445dfd3a2db14dc940fea1b2c0f9d2b9","abstract_canon_sha256":"384f98a95f7c85c2ef228a1e68bc7847fa734e25bc13d849cf00ffbe6ceb350b"},"schema_version":"1.0"},"canonical_sha256":"0f7a1b9a17067b953edac9ae92798a2b528239f1239703e963500a6a3df5194c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:12:50.457152Z","signature_b64":"20BTt7QOvoQcyxaDqKwhP3SE57NB1l5K9UWx6OubLo82aCqLdOG0DGs5P3egxdhABFYb1Uhhz+TyxiFGFV+xDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0f7a1b9a17067b953edac9ae92798a2b528239f1239703e963500a6a3df5194c","last_reissued_at":"2026-07-05T11:12:50.456649Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:12:50.456649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.24475","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:12:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wnRbUaEyBvUP9K8q/mTt19/es+7Kvly/7t6gIEKmYzA6fA4wDShdXnZhhVMg5PUTwStAXNMu+mJ/DBSSn+DiAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T16:31:12.403658Z"},"content_sha256":"513ac7d1ad707e97f7b820be273dc0e9c6ff3ea5eed070110b9f73be5f056203","schema_version":"1.0","event_id":"sha256:513ac7d1ad707e97f7b820be273dc0e9c6ff3ea5eed070110b9f73be5f056203"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:B55BXGQXAZ5ZKPW2ZGXJE6MKFN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SPPSFormer: High-quality Superpoint-based Transformer for Roof Plane Instance Segmentation from Point Clouds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Bisheng Yang, Cheng zeng, Chi Chen, Kai Sun, Wangle Zhang, Xiatian Qi, Yan Meng, Yuxuan Liu","submitted_at":"2025-05-30T11:23:16Z","abstract_excerpt":"Transformers have been seldom employed in point cloud roof plane instance segmentation, which is the focus of this study, and existing superpoint Transformers suffer from limited performance due to the use of low-quality superpoints. To address this challenge, we establish two criteria that high-quality superpoints for Transformers should satisfy and introduce a corresponding two-stage superpoint generation process. The superpoints generated by our method not only have accurate boundaries, but also exhibit consistent geometric sizes and shapes, both of which greatly benefit the feature learnin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.24475","kind":"arxiv","version":1},"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/2505.24475/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":"2026-07-05T11:12:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RSqE2RKfYhsfYz2ShpQiZ0xSXFXJAnlZGHBqgxRhDbY8c++MjD8p1wt9Jjeq/CCXWg4ywIo0P5hKWexJF8GJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T16:31:12.404566Z"},"content_sha256":"f23cc0c77e8d34f332282b868bd26d24f7c588d864760d1f0766c8f8193afe5e","schema_version":"1.0","event_id":"sha256:f23cc0c77e8d34f332282b868bd26d24f7c588d864760d1f0766c8f8193afe5e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B55BXGQXAZ5ZKPW2ZGXJE6MKFN/bundle.json","state_url":"https://pith.science/pith/B55BXGQXAZ5ZKPW2ZGXJE6MKFN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B55BXGQXAZ5ZKPW2ZGXJE6MKFN/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":"2026-08-10T16:31:12Z","links":{"resolver":"https://pith.science/pith/B55BXGQXAZ5ZKPW2ZGXJE6MKFN","bundle":"https://pith.science/pith/B55BXGQXAZ5ZKPW2ZGXJE6MKFN/bundle.json","state":"https://pith.science/pith/B55BXGQXAZ5ZKPW2ZGXJE6MKFN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B55BXGQXAZ5ZKPW2ZGXJE6MKFN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:B55BXGQXAZ5ZKPW2ZGXJE6MKFN","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":"384f98a95f7c85c2ef228a1e68bc7847fa734e25bc13d849cf00ffbe6ceb350b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-30T11:23:16Z","title_canon_sha256":"6317f81bf2c5dccb9a13ce24190519b7445dfd3a2db14dc940fea1b2c0f9d2b9"},"schema_version":"1.0","source":{"id":"2505.24475","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.24475","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"arxiv_version","alias_value":"2505.24475v1","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.24475","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"pith_short_12","alias_value":"B55BXGQXAZ5Z","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"pith_short_16","alias_value":"B55BXGQXAZ5ZKPW2","created_at":"2026-07-05T11:12:50Z"},{"alias_kind":"pith_short_8","alias_value":"B55BXGQX","created_at":"2026-07-05T11:12:50Z"}],"graph_snapshots":[{"event_id":"sha256:f23cc0c77e8d34f332282b868bd26d24f7c588d864760d1f0766c8f8193afe5e","target":"graph","created_at":"2026-07-05T11:12:50Z","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/2505.24475/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Transformers have been seldom employed in point cloud roof plane instance segmentation, which is the focus of this study, and existing superpoint Transformers suffer from limited performance due to the use of low-quality superpoints. To address this challenge, we establish two criteria that high-quality superpoints for Transformers should satisfy and introduce a corresponding two-stage superpoint generation process. The superpoints generated by our method not only have accurate boundaries, but also exhibit consistent geometric sizes and shapes, both of which greatly benefit the feature learnin","authors_text":"Bisheng Yang, Cheng zeng, Chi Chen, Kai Sun, Wangle Zhang, Xiatian Qi, Yan Meng, Yuxuan Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-30T11:23:16Z","title":"SPPSFormer: High-quality Superpoint-based Transformer for Roof Plane Instance Segmentation from Point Clouds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.24475","kind":"arxiv","version":1},"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":"sha256:513ac7d1ad707e97f7b820be273dc0e9c6ff3ea5eed070110b9f73be5f056203","target":"record","created_at":"2026-07-05T11:12:50Z","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":"384f98a95f7c85c2ef228a1e68bc7847fa734e25bc13d849cf00ffbe6ceb350b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2025-05-30T11:23:16Z","title_canon_sha256":"6317f81bf2c5dccb9a13ce24190519b7445dfd3a2db14dc940fea1b2c0f9d2b9"},"schema_version":"1.0","source":{"id":"2505.24475","kind":"arxiv","version":1}},"canonical_sha256":"0f7a1b9a17067b953edac9ae92798a2b528239f1239703e963500a6a3df5194c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f7a1b9a17067b953edac9ae92798a2b528239f1239703e963500a6a3df5194c","first_computed_at":"2026-07-05T11:12:50.456649Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:12:50.456649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"20BTt7QOvoQcyxaDqKwhP3SE57NB1l5K9UWx6OubLo82aCqLdOG0DGs5P3egxdhABFYb1Uhhz+TyxiFGFV+xDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:12:50.457152Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.24475","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:513ac7d1ad707e97f7b820be273dc0e9c6ff3ea5eed070110b9f73be5f056203","sha256:f23cc0c77e8d34f332282b868bd26d24f7c588d864760d1f0766c8f8193afe5e"],"state_sha256":"a6dc90c2daf3a7ce0d6438f4ce003b9ad273084f85d2763e1f1837a6975f6b62"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nu+POAookj7DaA4OayqbEWcN2Kxau6BMEyfAocj5AsMS/KquQPfs+c2C9lvArvGCW1aIQowqf+xKLcZ/PPwOBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T16:31:12.412078Z","bundle_sha256":"2c9049e223d60261ff7919f8542ffc76e0847b5a45fe4cc8beb464fd0f8cfa82"}}