{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:EYDBB6ZRJ3YCOWLS3ILRIG4TB2","short_pith_number":"pith:EYDBB6ZR","schema_version":"1.0","canonical_sha256":"260610fb314ef0275972da17141b930e9b60c205d357c76a15474a7c0cb3dfcf","source":{"kind":"arxiv","id":"1807.01253","version":1},"attestation_state":"computed","paper":{"title":"Who did What at Where and When: Simultaneous Multi-Person Tracking and Activity Recognition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Ming-Ching Chang, Siwei Lyu, Wenbo Li","submitted_at":"2018-07-03T15:51:25Z","abstract_excerpt":"We present a bootstrapping framework to simultaneously improve multi-person tracking and activity recognition at individual, interaction and social group activity levels. The inference consists of identifying trajectories of all pedestrian actors, individual activities, pairwise interactions, and collective activities, given the observed pedestrian detections. Our method uses a graphical model to represent and solve the joint tracking and recognition problems via multi-stages: (1) activity-aware tracking, (2) joint interaction recognition and occlusion recovery, and (3) collective activity rec"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1807.01253","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-07-03T15:51:25Z","cross_cats_sorted":[],"title_canon_sha256":"0497eedba15778b92c4920cfd010d08c21a8cfcbbedc7d9ae85ebb51a3ed2cb9","abstract_canon_sha256":"9b5e657c93c12364cf7c867271c1535cca8d8129ee37ae26c491517e38c22daf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:44.780614Z","signature_b64":"7Pg919NRBFsknH6Y1F60vCwZX6y+ngSA9u9j8cmjO8mHvUKN6RFW+V+mZ1u4Z6CLBGoL1gdA9zYEQyzSrX2cCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"260610fb314ef0275972da17141b930e9b60c205d357c76a15474a7c0cb3dfcf","last_reissued_at":"2026-05-18T00:11:44.779922Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:44.779922Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Who did What at Where and When: Simultaneous Multi-Person Tracking and Activity Recognition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Ming-Ching Chang, Siwei Lyu, Wenbo Li","submitted_at":"2018-07-03T15:51:25Z","abstract_excerpt":"We present a bootstrapping framework to simultaneously improve multi-person tracking and activity recognition at individual, interaction and social group activity levels. The inference consists of identifying trajectories of all pedestrian actors, individual activities, pairwise interactions, and collective activities, given the observed pedestrian detections. Our method uses a graphical model to represent and solve the joint tracking and recognition problems via multi-stages: (1) activity-aware tracking, (2) joint interaction recognition and occlusion recovery, and (3) collective activity rec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.01253","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1807.01253","created_at":"2026-05-18T00:11:44.780019+00:00"},{"alias_kind":"arxiv_version","alias_value":"1807.01253v1","created_at":"2026-05-18T00:11:44.780019+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.01253","created_at":"2026-05-18T00:11:44.780019+00:00"},{"alias_kind":"pith_short_12","alias_value":"EYDBB6ZRJ3YC","created_at":"2026-05-18T12:32:22.470017+00:00"},{"alias_kind":"pith_short_16","alias_value":"EYDBB6ZRJ3YCOWLS","created_at":"2026-05-18T12:32:22.470017+00:00"},{"alias_kind":"pith_short_8","alias_value":"EYDBB6ZR","created_at":"2026-05-18T12:32:22.470017+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/EYDBB6ZRJ3YCOWLS3ILRIG4TB2","json":"https://pith.science/pith/EYDBB6ZRJ3YCOWLS3ILRIG4TB2.json","graph_json":"https://pith.science/api/pith-number/EYDBB6ZRJ3YCOWLS3ILRIG4TB2/graph.json","events_json":"https://pith.science/api/pith-number/EYDBB6ZRJ3YCOWLS3ILRIG4TB2/events.json","paper":"https://pith.science/paper/EYDBB6ZR"},"agent_actions":{"view_html":"https://pith.science/pith/EYDBB6ZRJ3YCOWLS3ILRIG4TB2","download_json":"https://pith.science/pith/EYDBB6ZRJ3YCOWLS3ILRIG4TB2.json","view_paper":"https://pith.science/paper/EYDBB6ZR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1807.01253&json=true","fetch_graph":"https://pith.science/api/pith-number/EYDBB6ZRJ3YCOWLS3ILRIG4TB2/graph.json","fetch_events":"https://pith.science/api/pith-number/EYDBB6ZRJ3YCOWLS3ILRIG4TB2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EYDBB6ZRJ3YCOWLS3ILRIG4TB2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EYDBB6ZRJ3YCOWLS3ILRIG4TB2/action/storage_attestation","attest_author":"https://pith.science/pith/EYDBB6ZRJ3YCOWLS3ILRIG4TB2/action/author_attestation","sign_citation":"https://pith.science/pith/EYDBB6ZRJ3YCOWLS3ILRIG4TB2/action/citation_signature","submit_replication":"https://pith.science/pith/EYDBB6ZRJ3YCOWLS3ILRIG4TB2/action/replication_record"}},"created_at":"2026-05-18T00:11:44.780019+00:00","updated_at":"2026-05-18T00:11:44.780019+00:00"}