{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:JBVYR2JQUF7LEWXXDGHUW3O3NR","short_pith_number":"pith:JBVYR2JQ","canonical_record":{"source":{"id":"2007.06866","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-07-14T07:20:14Z","cross_cats_sorted":[],"title_canon_sha256":"5eec51e581798d1c43d81e80b555c804659f32bb2ccd663e6ece93519f8b195b","abstract_canon_sha256":"292ea597fafe784788793bd1b55d9901731593294b4ed227bb83abb88898a35b"},"schema_version":"1.0"},"canonical_sha256":"486b88e930a17eb25af7198f4b6ddb6c5b246f58c3305d1592d1a860c66df47c","source":{"kind":"arxiv","id":"2007.06866","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.06866","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"arxiv_version","alias_value":"2007.06866v1","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.06866","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"pith_short_12","alias_value":"JBVYR2JQUF7L","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"pith_short_16","alias_value":"JBVYR2JQUF7LEWXX","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"pith_short_8","alias_value":"JBVYR2JQ","created_at":"2026-07-05T01:18:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:JBVYR2JQUF7LEWXXDGHUW3O3NR","target":"record","payload":{"canonical_record":{"source":{"id":"2007.06866","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-07-14T07:20:14Z","cross_cats_sorted":[],"title_canon_sha256":"5eec51e581798d1c43d81e80b555c804659f32bb2ccd663e6ece93519f8b195b","abstract_canon_sha256":"292ea597fafe784788793bd1b55d9901731593294b4ed227bb83abb88898a35b"},"schema_version":"1.0"},"canonical_sha256":"486b88e930a17eb25af7198f4b6ddb6c5b246f58c3305d1592d1a860c66df47c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:18:24.166910Z","signature_b64":"Y/+W3F6wEf0mFKOXCK5HRsfsgH5NHew3Qi+jkDXe29QIc6vxW2OTCVDY0TtEieXelo/mIkHtdUFmpNEFNDhkDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"486b88e930a17eb25af7198f4b6ddb6c5b246f58c3305d1592d1a860c66df47c","last_reissued_at":"2026-07-05T01:18:24.166535Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:18:24.166535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.06866","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":"2026-07-05T01:18:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"frOAseEB9VUbqNKYxwfIlSc/+bVgstJ4uYTBB7LnojLsezkb84fe0tpnt/FlXdLDdX5ks4CYBVqih93+1yL5Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T00:48:51.792377Z"},"content_sha256":"759985d1a96d114395463eaffa525bad5d28b0c49d91bd37fb6b0a1cada23dea","schema_version":"1.0","event_id":"sha256:759985d1a96d114395463eaffa525bad5d28b0c49d91bd37fb6b0a1cada23dea"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:JBVYR2JQUF7LEWXXDGHUW3O3NR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Alleviating Over-segmentation Errors by Detecting Action Boundaries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Hirokatsu Kataoka, Seito Kasai, Yoshimitsu Aoki, Yuchi Ishikawa","submitted_at":"2020-07-14T07:20:14Z","abstract_excerpt":"We propose an effective framework for the temporal action segmentation task, namely an Action Segment Refinement Framework (ASRF). Our model architecture consists of a long-term feature extractor and two branches: the Action Segmentation Branch (ASB) and the Boundary Regression Branch (BRB). The long-term feature extractor provides shared features for the two branches with a wide temporal receptive field. The ASB classifies video frames with action classes, while the BRB regresses the action boundary probabilities. The action boundaries predicted by the BRB refine the output from the ASB, whic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.06866","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/2007.06866/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":"2026-07-05T01:18:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WKwgrkFyQRU8N0/4LJFQDBNPVFMJxK72FzMAQZFq9RUs2dvpGgl3sIXoXQM7NAh/m4hFSdNy0qr1pLtn6o9aAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T00:48:51.792765Z"},"content_sha256":"0cbdf1f7c9ea54b2680e1d89b46cfd43cbea14c8dc9cf71cb964092093799140","schema_version":"1.0","event_id":"sha256:0cbdf1f7c9ea54b2680e1d89b46cfd43cbea14c8dc9cf71cb964092093799140"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JBVYR2JQUF7LEWXXDGHUW3O3NR/bundle.json","state_url":"https://pith.science/pith/JBVYR2JQUF7LEWXXDGHUW3O3NR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JBVYR2JQUF7LEWXXDGHUW3O3NR/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":"2026-08-13T00:48:51Z","links":{"resolver":"https://pith.science/pith/JBVYR2JQUF7LEWXXDGHUW3O3NR","bundle":"https://pith.science/pith/JBVYR2JQUF7LEWXXDGHUW3O3NR/bundle.json","state":"https://pith.science/pith/JBVYR2JQUF7LEWXXDGHUW3O3NR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JBVYR2JQUF7LEWXXDGHUW3O3NR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:JBVYR2JQUF7LEWXXDGHUW3O3NR","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":"292ea597fafe784788793bd1b55d9901731593294b4ed227bb83abb88898a35b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-07-14T07:20:14Z","title_canon_sha256":"5eec51e581798d1c43d81e80b555c804659f32bb2ccd663e6ece93519f8b195b"},"schema_version":"1.0","source":{"id":"2007.06866","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.06866","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"arxiv_version","alias_value":"2007.06866v1","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.06866","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"pith_short_12","alias_value":"JBVYR2JQUF7L","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"pith_short_16","alias_value":"JBVYR2JQUF7LEWXX","created_at":"2026-07-05T01:18:24Z"},{"alias_kind":"pith_short_8","alias_value":"JBVYR2JQ","created_at":"2026-07-05T01:18:24Z"}],"graph_snapshots":[{"event_id":"sha256:0cbdf1f7c9ea54b2680e1d89b46cfd43cbea14c8dc9cf71cb964092093799140","target":"graph","created_at":"2026-07-05T01:18:24Z","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/2007.06866/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose an effective framework for the temporal action segmentation task, namely an Action Segment Refinement Framework (ASRF). Our model architecture consists of a long-term feature extractor and two branches: the Action Segmentation Branch (ASB) and the Boundary Regression Branch (BRB). The long-term feature extractor provides shared features for the two branches with a wide temporal receptive field. The ASB classifies video frames with action classes, while the BRB regresses the action boundary probabilities. The action boundaries predicted by the BRB refine the output from the ASB, whic","authors_text":"Hirokatsu Kataoka, Seito Kasai, Yoshimitsu Aoki, Yuchi Ishikawa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-07-14T07:20:14Z","title":"Alleviating Over-segmentation Errors by Detecting Action Boundaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.06866","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":"sha256:759985d1a96d114395463eaffa525bad5d28b0c49d91bd37fb6b0a1cada23dea","target":"record","created_at":"2026-07-05T01:18:24Z","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":"292ea597fafe784788793bd1b55d9901731593294b4ed227bb83abb88898a35b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-07-14T07:20:14Z","title_canon_sha256":"5eec51e581798d1c43d81e80b555c804659f32bb2ccd663e6ece93519f8b195b"},"schema_version":"1.0","source":{"id":"2007.06866","kind":"arxiv","version":1}},"canonical_sha256":"486b88e930a17eb25af7198f4b6ddb6c5b246f58c3305d1592d1a860c66df47c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"486b88e930a17eb25af7198f4b6ddb6c5b246f58c3305d1592d1a860c66df47c","first_computed_at":"2026-07-05T01:18:24.166535Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:18:24.166535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y/+W3F6wEf0mFKOXCK5HRsfsgH5NHew3Qi+jkDXe29QIc6vxW2OTCVDY0TtEieXelo/mIkHtdUFmpNEFNDhkDA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:18:24.166910Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.06866","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:759985d1a96d114395463eaffa525bad5d28b0c49d91bd37fb6b0a1cada23dea","sha256:0cbdf1f7c9ea54b2680e1d89b46cfd43cbea14c8dc9cf71cb964092093799140"],"state_sha256":"55d40341fab09f720333157f580334dfd803c6cd7d563184ad18e09d9a2ee1f1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7+oO8x/I7s3CFEfDuTnHc3a8Bz0NvsHTI/g7HEHHvNLBJVwZi4no5ybZxMT7enLygTarxPdJJqWZMffsytCVDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T00:48:51.796037Z","bundle_sha256":"9acb1e466565eb9cea45db18343e15b93a36373128153105d3059fd4fd8719f8"}}