{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4P4T5CVDRK5EXP3XMUECHNDCRT","short_pith_number":"pith:4P4T5CVD","canonical_record":{"source":{"id":"1812.08849","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-12-20T21:22:43Z","cross_cats_sorted":[],"title_canon_sha256":"c9f71f5f8b7d98319f28c17712c3b97d4b070c8a9ca3ee0ad4fb2e0f8a0b75a3","abstract_canon_sha256":"96f6f28231a503f5fbe26a9a804fc804e269c86b8001025f380e75fb86ba2c17"},"schema_version":"1.0"},"canonical_sha256":"e3f93e8aa38aba4bbf77650823b4628cdd4940856fdeccf54c760e1f3383cf55","source":{"kind":"arxiv","id":"1812.08849","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.08849","created_at":"2026-05-17T23:57:46Z"},{"alias_kind":"arxiv_version","alias_value":"1812.08849v1","created_at":"2026-05-17T23:57:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.08849","created_at":"2026-05-17T23:57:46Z"},{"alias_kind":"pith_short_12","alias_value":"4P4T5CVDRK5E","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4P4T5CVDRK5EXP3X","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4P4T5CVD","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4P4T5CVDRK5EXP3XMUECHNDCRT","target":"record","payload":{"canonical_record":{"source":{"id":"1812.08849","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-12-20T21:22:43Z","cross_cats_sorted":[],"title_canon_sha256":"c9f71f5f8b7d98319f28c17712c3b97d4b070c8a9ca3ee0ad4fb2e0f8a0b75a3","abstract_canon_sha256":"96f6f28231a503f5fbe26a9a804fc804e269c86b8001025f380e75fb86ba2c17"},"schema_version":"1.0"},"canonical_sha256":"e3f93e8aa38aba4bbf77650823b4628cdd4940856fdeccf54c760e1f3383cf55","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:46.117157Z","signature_b64":"+z/LjhW/go5qsmWn7i2D5b0dJOjxyLuQhgXYtsZKVLBEFli5zE8orA/nMH/yaXCKxWgmtygiFTn2tMZstfr0CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e3f93e8aa38aba4bbf77650823b4628cdd4940856fdeccf54c760e1f3383cf55","last_reissued_at":"2026-05-17T23:57:46.116644Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:46.116644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.08849","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":"2026-05-17T23:57:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gmQSAu+DQTBJq9262om9Ve7vyusmVM5mSdQvCaJi+8T9wolUaOMT6Kjr7gPYAZ0v1sdlkyC+yvn+K3wfDoNfBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T16:40:03.081753Z"},"content_sha256":"e50da4d3fdb683d24469b6cfc8e93d2bf6337ddf5592444514b13d5d48b70e5c","schema_version":"1.0","event_id":"sha256:e50da4d3fdb683d24469b6cfc8e93d2bf6337ddf5592444514b13d5d48b70e5c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4P4T5CVDRK5EXP3XMUECHNDCRT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Three Dimensional Reconstruction of Botanical Trees with Simulatable Geometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Ed Quigley, Ronald Fedkiw, Winnie Lin, Yilin Zhu","submitted_at":"2018-12-20T21:22:43Z","abstract_excerpt":"We tackle the challenging problem of creating full and accurate three dimensional reconstructions of botanical trees with the topological and geometric accuracy required for subsequent physical simulation, e.g. in response to wind forces. Although certain aspects of our approach would benefit from various improvements, our results exceed the state of the art especially in geometric and topological complexity and accuracy. Starting with two dimensional RGB image data acquired from cameras attached to drones, we create point clouds, textured triangle meshes, and a simulatable and skinned cylindr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.08849","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":""},"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":"2026-05-17T23:57:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O50R3lQJObW8JsnM5Py6KSnRZyqBWFN0w3LzHAVOIZdt1eupQuePi0baa0CYlhoGdzTNkXRRUK2FW4ASlXI1BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T16:40:03.082101Z"},"content_sha256":"381519fbfc08f792f99679fecd288c2a097a226784d9732b2472caddb8d0f4e3","schema_version":"1.0","event_id":"sha256:381519fbfc08f792f99679fecd288c2a097a226784d9732b2472caddb8d0f4e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4P4T5CVDRK5EXP3XMUECHNDCRT/bundle.json","state_url":"https://pith.science/pith/4P4T5CVDRK5EXP3XMUECHNDCRT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4P4T5CVDRK5EXP3XMUECHNDCRT/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":"2026-06-08T16:40:03Z","links":{"resolver":"https://pith.science/pith/4P4T5CVDRK5EXP3XMUECHNDCRT","bundle":"https://pith.science/pith/4P4T5CVDRK5EXP3XMUECHNDCRT/bundle.json","state":"https://pith.science/pith/4P4T5CVDRK5EXP3XMUECHNDCRT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4P4T5CVDRK5EXP3XMUECHNDCRT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4P4T5CVDRK5EXP3XMUECHNDCRT","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":"96f6f28231a503f5fbe26a9a804fc804e269c86b8001025f380e75fb86ba2c17","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-12-20T21:22:43Z","title_canon_sha256":"c9f71f5f8b7d98319f28c17712c3b97d4b070c8a9ca3ee0ad4fb2e0f8a0b75a3"},"schema_version":"1.0","source":{"id":"1812.08849","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.08849","created_at":"2026-05-17T23:57:46Z"},{"alias_kind":"arxiv_version","alias_value":"1812.08849v1","created_at":"2026-05-17T23:57:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.08849","created_at":"2026-05-17T23:57:46Z"},{"alias_kind":"pith_short_12","alias_value":"4P4T5CVDRK5E","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4P4T5CVDRK5EXP3X","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4P4T5CVD","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:381519fbfc08f792f99679fecd288c2a097a226784d9732b2472caddb8d0f4e3","target":"graph","created_at":"2026-05-17T23:57:46Z","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":"We tackle the challenging problem of creating full and accurate three dimensional reconstructions of botanical trees with the topological and geometric accuracy required for subsequent physical simulation, e.g. in response to wind forces. Although certain aspects of our approach would benefit from various improvements, our results exceed the state of the art especially in geometric and topological complexity and accuracy. Starting with two dimensional RGB image data acquired from cameras attached to drones, we create point clouds, textured triangle meshes, and a simulatable and skinned cylindr","authors_text":"Ed Quigley, Ronald Fedkiw, Winnie Lin, Yilin Zhu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-12-20T21:22:43Z","title":"Three Dimensional Reconstruction of Botanical Trees with Simulatable Geometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.08849","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:e50da4d3fdb683d24469b6cfc8e93d2bf6337ddf5592444514b13d5d48b70e5c","target":"record","created_at":"2026-05-17T23:57:46Z","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":"96f6f28231a503f5fbe26a9a804fc804e269c86b8001025f380e75fb86ba2c17","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-12-20T21:22:43Z","title_canon_sha256":"c9f71f5f8b7d98319f28c17712c3b97d4b070c8a9ca3ee0ad4fb2e0f8a0b75a3"},"schema_version":"1.0","source":{"id":"1812.08849","kind":"arxiv","version":1}},"canonical_sha256":"e3f93e8aa38aba4bbf77650823b4628cdd4940856fdeccf54c760e1f3383cf55","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e3f93e8aa38aba4bbf77650823b4628cdd4940856fdeccf54c760e1f3383cf55","first_computed_at":"2026-05-17T23:57:46.116644Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:57:46.116644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+z/LjhW/go5qsmWn7i2D5b0dJOjxyLuQhgXYtsZKVLBEFli5zE8orA/nMH/yaXCKxWgmtygiFTn2tMZstfr0CQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:57:46.117157Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.08849","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e50da4d3fdb683d24469b6cfc8e93d2bf6337ddf5592444514b13d5d48b70e5c","sha256:381519fbfc08f792f99679fecd288c2a097a226784d9732b2472caddb8d0f4e3"],"state_sha256":"a1b63f952ff3d0e52450bdc0d95659f0e31df3f28620de0111db9c2ff594d1eb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9lM6GGuBytZB/YxFUyN84C0cCJmq9PvQG/3e3e33CuVPiz4jzjPQKELxJ9VsLxFwBr7kgNnD2/9941MVqRfTCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T16:40:03.085003Z","bundle_sha256":"a7e8a1bc59682ab9cd6f2b66094a1f4d9d8856bdc752f01aece786361c4e3d70"}}