{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:TUYAG6CFJELUNG62G2GHLYHQK2","short_pith_number":"pith:TUYAG6CF","canonical_record":{"source":{"id":"2111.01606","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T14:05:41Z","cross_cats_sorted":[],"title_canon_sha256":"49e60522f924fcffeab4eccbd40a02876208d7c1a51045fdaa9bb7dd9596889c","abstract_canon_sha256":"70660f750b596501e7fbdbb3ed3507fa5045326b6176e5a5f51b64f47d81a4a1"},"schema_version":"1.0"},"canonical_sha256":"9d300378454917469bda368c75e0f056818341d3c6fb9b8a2ac53f3062b80a40","source":{"kind":"arxiv","id":"2111.01606","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.01606","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"arxiv_version","alias_value":"2111.01606v1","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.01606","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"pith_short_12","alias_value":"TUYAG6CFJELU","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"TUYAG6CFJELUNG62","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"TUYAG6CF","created_at":"2026-07-05T03:28:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:TUYAG6CFJELUNG62G2GHLYHQK2","target":"record","payload":{"canonical_record":{"source":{"id":"2111.01606","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T14:05:41Z","cross_cats_sorted":[],"title_canon_sha256":"49e60522f924fcffeab4eccbd40a02876208d7c1a51045fdaa9bb7dd9596889c","abstract_canon_sha256":"70660f750b596501e7fbdbb3ed3507fa5045326b6176e5a5f51b64f47d81a4a1"},"schema_version":"1.0"},"canonical_sha256":"9d300378454917469bda368c75e0f056818341d3c6fb9b8a2ac53f3062b80a40","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:28:30.810122Z","signature_b64":"8L7mhppHOb5QlPmFHe6aTvcCSVe8OWvI962De8IY9iAnH2UhUwBEnMQsReci/k92HRv3Dx94KyJ3+uAci6OLAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9d300378454917469bda368c75e0f056818341d3c6fb9b8a2ac53f3062b80a40","last_reissued_at":"2026-07-05T03:28:30.809636Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:28:30.809636Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.01606","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":"2026-07-05T03:28:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q+9zRvAOS+vTZFhVjZ0EHhj2cG7bm6be7R9SHtT8QDbeTY/fV+7vs7lsfto8yAb0T8W3DESZ83Jy6Anse70uAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T20:56:10.277812Z"},"content_sha256":"10b682c2080486a813754b1f009151bb2067fb0ea1783d0b6d1cf4654fffa9d4","schema_version":"1.0","event_id":"sha256:10b682c2080486a813754b1f009151bb2067fb0ea1783d0b6d1cf4654fffa9d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:TUYAG6CFJELUNG62G2GHLYHQK2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"PolyTrack: Tracking with Bounding Polygons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Gaspar Faure, Guillaume-Alexandre Bilodeau, Hughes Perreault, Nicolas Saunier","submitted_at":"2021-11-02T14:05:41Z","abstract_excerpt":"In this paper, we present a novel method called PolyTrack for fast multi-object tracking and segmentation using bounding polygons. Polytrack detects objects by producing heatmaps of their center keypoint. For each of them, a rough segmentation is done by computing a bounding polygon over each instance instead of the traditional bounding box. Tracking is done by taking two consecutive frames as input and computing a center offset for each object detected in the first frame to predict its location in the second frame. A Kalman filter is also applied to reduce the number of ID switches. Since our"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.01606","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/2111.01606/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":"2026-07-05T03:28:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eq1o1k7+CVXojvPtbr9+ip1bf3aKvIX5xABgk1kVBqm4IQ6DIExcGkxcmC2uY6mMHgt/gkEV7l9gSdtKjKJ8Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T20:56:10.278766Z"},"content_sha256":"7a559c211c47ca95f3e3dbd51eaff9977024513b2409a7317a3746349d90dbae","schema_version":"1.0","event_id":"sha256:7a559c211c47ca95f3e3dbd51eaff9977024513b2409a7317a3746349d90dbae"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TUYAG6CFJELUNG62G2GHLYHQK2/bundle.json","state_url":"https://pith.science/pith/TUYAG6CFJELUNG62G2GHLYHQK2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TUYAG6CFJELUNG62G2GHLYHQK2/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":"2026-08-18T20:56:10Z","links":{"resolver":"https://pith.science/pith/TUYAG6CFJELUNG62G2GHLYHQK2","bundle":"https://pith.science/pith/TUYAG6CFJELUNG62G2GHLYHQK2/bundle.json","state":"https://pith.science/pith/TUYAG6CFJELUNG62G2GHLYHQK2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TUYAG6CFJELUNG62G2GHLYHQK2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:TUYAG6CFJELUNG62G2GHLYHQK2","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":"70660f750b596501e7fbdbb3ed3507fa5045326b6176e5a5f51b64f47d81a4a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T14:05:41Z","title_canon_sha256":"49e60522f924fcffeab4eccbd40a02876208d7c1a51045fdaa9bb7dd9596889c"},"schema_version":"1.0","source":{"id":"2111.01606","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.01606","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"arxiv_version","alias_value":"2111.01606v1","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.01606","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"pith_short_12","alias_value":"TUYAG6CFJELU","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"TUYAG6CFJELUNG62","created_at":"2026-07-05T03:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"TUYAG6CF","created_at":"2026-07-05T03:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:7a559c211c47ca95f3e3dbd51eaff9977024513b2409a7317a3746349d90dbae","target":"graph","created_at":"2026-07-05T03:28:30Z","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/2111.01606/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we present a novel method called PolyTrack for fast multi-object tracking and segmentation using bounding polygons. Polytrack detects objects by producing heatmaps of their center keypoint. For each of them, a rough segmentation is done by computing a bounding polygon over each instance instead of the traditional bounding box. Tracking is done by taking two consecutive frames as input and computing a center offset for each object detected in the first frame to predict its location in the second frame. A Kalman filter is also applied to reduce the number of ID switches. Since our","authors_text":"Gaspar Faure, Guillaume-Alexandre Bilodeau, Hughes Perreault, Nicolas Saunier","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T14:05:41Z","title":"PolyTrack: Tracking with Bounding Polygons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.01606","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":"sha256:10b682c2080486a813754b1f009151bb2067fb0ea1783d0b6d1cf4654fffa9d4","target":"record","created_at":"2026-07-05T03:28:30Z","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":"70660f750b596501e7fbdbb3ed3507fa5045326b6176e5a5f51b64f47d81a4a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T14:05:41Z","title_canon_sha256":"49e60522f924fcffeab4eccbd40a02876208d7c1a51045fdaa9bb7dd9596889c"},"schema_version":"1.0","source":{"id":"2111.01606","kind":"arxiv","version":1}},"canonical_sha256":"9d300378454917469bda368c75e0f056818341d3c6fb9b8a2ac53f3062b80a40","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9d300378454917469bda368c75e0f056818341d3c6fb9b8a2ac53f3062b80a40","first_computed_at":"2026-07-05T03:28:30.809636Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:28:30.809636Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8L7mhppHOb5QlPmFHe6aTvcCSVe8OWvI962De8IY9iAnH2UhUwBEnMQsReci/k92HRv3Dx94KyJ3+uAci6OLAw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:28:30.810122Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.01606","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:10b682c2080486a813754b1f009151bb2067fb0ea1783d0b6d1cf4654fffa9d4","sha256:7a559c211c47ca95f3e3dbd51eaff9977024513b2409a7317a3746349d90dbae"],"state_sha256":"a1707ddff9dcaf5756feea0471fbfd80020f959e798b2caa36f503569361ccb2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uRAGDgybc/KXYGQclH53W0w2dxGhrqJG8K6ypar9C/q2TVI/fnpWCsxYAPfPFWWIpCHteIuJnHcSL2UZLxkzDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T20:56:10.288502Z","bundle_sha256":"22839f2b6d908480f51536f0dd82b42370c5e594f6e1962d4076008872d0d363"}}