{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:ALNZUQLZZL25UWZZIXKRRFRQYT","short_pith_number":"pith:ALNZUQLZ","canonical_record":{"source":{"id":"2203.16531","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2022-03-30T17:59:46Z","cross_cats_sorted":[],"title_canon_sha256":"d12f6e8aede99cd7910e0bac647c5786ffa727f5800836e7304a11061a76735f","abstract_canon_sha256":"512bfe185b4ddf8f20577f15df08d016167eb19b15bca5672c47fa8a14dcef84"},"schema_version":"1.0"},"canonical_sha256":"02db9a4179caf5da5b3945d5189630c4eeaabd2980841b21665ed7b65de4fe77","source":{"kind":"arxiv","id":"2203.16531","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.16531","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"arxiv_version","alias_value":"2203.16531v1","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.16531","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"pith_short_12","alias_value":"ALNZUQLZZL25","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"pith_short_16","alias_value":"ALNZUQLZZL25UWZZ","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"pith_short_8","alias_value":"ALNZUQLZ","created_at":"2026-07-05T04:10:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:ALNZUQLZZL25UWZZIXKRRFRQYT","target":"record","payload":{"canonical_record":{"source":{"id":"2203.16531","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2022-03-30T17:59:46Z","cross_cats_sorted":[],"title_canon_sha256":"d12f6e8aede99cd7910e0bac647c5786ffa727f5800836e7304a11061a76735f","abstract_canon_sha256":"512bfe185b4ddf8f20577f15df08d016167eb19b15bca5672c47fa8a14dcef84"},"schema_version":"1.0"},"canonical_sha256":"02db9a4179caf5da5b3945d5189630c4eeaabd2980841b21665ed7b65de4fe77","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:10:11.405948Z","signature_b64":"GNZwQmaPsr/9A42VBc6wx5sWTlYOqCG2OXoYFcNW5SjWKa6pohQOcVgO9B/8wufjirhkzZRtJIy8aA5GQTemAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"02db9a4179caf5da5b3945d5189630c4eeaabd2980841b21665ed7b65de4fe77","last_reissued_at":"2026-07-05T04:10:11.405531Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:10:11.405531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2203.16531","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":"2026-07-05T04:10:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0UceuDmLn/inScA0gjxJDkgOPHV67w21hOZV+BMEi0ftKSioGe8sOlmd+TaMMZfZwYObVwsmosQ5W7fkY+QOCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:07:18.489545Z"},"content_sha256":"567b25fb06d772b4848796b0bf2020088f6a998a44a9aae51fbd0215ade6aff8","schema_version":"1.0","event_id":"sha256:567b25fb06d772b4848796b0bf2020088f6a998a44a9aae51fbd0215ade6aff8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:ALNZUQLZZL25UWZZIXKRRFRQYT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Understanding 3D Object Articulation in Internet Videos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Chris Rockwell, David F. Fouhey, Linyi Jin, Shengyi Qian, Siyi Chen","submitted_at":"2022-03-30T17:59:46Z","abstract_excerpt":"We propose to investigate detecting and characterizing the 3D planar articulation of objects from ordinary videos. While seemingly easy for humans, this problem poses many challenges for computers. We propose to approach this problem by combining a top-down detection system that finds planes that can be articulated along with an optimization approach that solves for a 3D plane that can explain a sequence of observed articulations. We show that this system can be trained on a combination of videos and 3D scan datasets. When tested on a dataset of challenging Internet videos and the Charades dat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.16531","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/2203.16531/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":"2026-07-05T04:10:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9qep7+61yw37OjbOJkvHBX0ylXAbDqEcRNcJhfVPQ44iHQkwmfYny3kpePegx/AFPujRzcAjfi5FbwJyujUxAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:07:18.490046Z"},"content_sha256":"c451ce120363eb3086df9b17970e61e937df94a9856d688d2be3fc9c1a88b891","schema_version":"1.0","event_id":"sha256:c451ce120363eb3086df9b17970e61e937df94a9856d688d2be3fc9c1a88b891"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ALNZUQLZZL25UWZZIXKRRFRQYT/bundle.json","state_url":"https://pith.science/pith/ALNZUQLZZL25UWZZIXKRRFRQYT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ALNZUQLZZL25UWZZIXKRRFRQYT/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":"2026-08-03T17:07:18Z","links":{"resolver":"https://pith.science/pith/ALNZUQLZZL25UWZZIXKRRFRQYT","bundle":"https://pith.science/pith/ALNZUQLZZL25UWZZIXKRRFRQYT/bundle.json","state":"https://pith.science/pith/ALNZUQLZZL25UWZZIXKRRFRQYT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ALNZUQLZZL25UWZZIXKRRFRQYT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:ALNZUQLZZL25UWZZIXKRRFRQYT","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":"512bfe185b4ddf8f20577f15df08d016167eb19b15bca5672c47fa8a14dcef84","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2022-03-30T17:59:46Z","title_canon_sha256":"d12f6e8aede99cd7910e0bac647c5786ffa727f5800836e7304a11061a76735f"},"schema_version":"1.0","source":{"id":"2203.16531","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.16531","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"arxiv_version","alias_value":"2203.16531v1","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.16531","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"pith_short_12","alias_value":"ALNZUQLZZL25","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"pith_short_16","alias_value":"ALNZUQLZZL25UWZZ","created_at":"2026-07-05T04:10:11Z"},{"alias_kind":"pith_short_8","alias_value":"ALNZUQLZ","created_at":"2026-07-05T04:10:11Z"}],"graph_snapshots":[{"event_id":"sha256:c451ce120363eb3086df9b17970e61e937df94a9856d688d2be3fc9c1a88b891","target":"graph","created_at":"2026-07-05T04:10:11Z","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/2203.16531/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose to investigate detecting and characterizing the 3D planar articulation of objects from ordinary videos. While seemingly easy for humans, this problem poses many challenges for computers. We propose to approach this problem by combining a top-down detection system that finds planes that can be articulated along with an optimization approach that solves for a 3D plane that can explain a sequence of observed articulations. We show that this system can be trained on a combination of videos and 3D scan datasets. When tested on a dataset of challenging Internet videos and the Charades dat","authors_text":"Chris Rockwell, David F. Fouhey, Linyi Jin, Shengyi Qian, Siyi Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2022-03-30T17:59:46Z","title":"Understanding 3D Object Articulation in Internet Videos"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.16531","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":"sha256:567b25fb06d772b4848796b0bf2020088f6a998a44a9aae51fbd0215ade6aff8","target":"record","created_at":"2026-07-05T04:10:11Z","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":"512bfe185b4ddf8f20577f15df08d016167eb19b15bca5672c47fa8a14dcef84","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2022-03-30T17:59:46Z","title_canon_sha256":"d12f6e8aede99cd7910e0bac647c5786ffa727f5800836e7304a11061a76735f"},"schema_version":"1.0","source":{"id":"2203.16531","kind":"arxiv","version":1}},"canonical_sha256":"02db9a4179caf5da5b3945d5189630c4eeaabd2980841b21665ed7b65de4fe77","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02db9a4179caf5da5b3945d5189630c4eeaabd2980841b21665ed7b65de4fe77","first_computed_at":"2026-07-05T04:10:11.405531Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:10:11.405531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GNZwQmaPsr/9A42VBc6wx5sWTlYOqCG2OXoYFcNW5SjWKa6pohQOcVgO9B/8wufjirhkzZRtJIy8aA5GQTemAA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:10:11.405948Z","signed_message":"canonical_sha256_bytes"},"source_id":"2203.16531","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:567b25fb06d772b4848796b0bf2020088f6a998a44a9aae51fbd0215ade6aff8","sha256:c451ce120363eb3086df9b17970e61e937df94a9856d688d2be3fc9c1a88b891"],"state_sha256":"0b11b8ba5bd77fc2c6851dbcde02561e16c4d3472bb7f1c07b20fb9b7c32edf1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pwe80ZPqwF+S7SntcYbE0ugXAWZmBY8TvxacAjWe8dLE/A+l4txuVbkCO3CScGqqwYJZ4A6y64Ugy72OcSBsCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:07:18.495078Z","bundle_sha256":"a9315f771c6d82fb16135b18e1f0a013bb686ff1fbbe4b3bd8c4c1e43af93705"}}