{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:VSXF35N3GEEN3Q756G3QGTC4LF","short_pith_number":"pith:VSXF35N3","canonical_record":{"source":{"id":"1903.09868","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-03-23T19:14:53Z","cross_cats_sorted":[],"title_canon_sha256":"c30b59dd711d63251156f55890a591716c078fd397d7e3eb1bffec1084bb044f","abstract_canon_sha256":"e9159e0c9a9ac5e7d834fe57b31e5ff9c3b1ab0397e6f2d09fbc48dbfd09d621"},"schema_version":"1.0"},"canonical_sha256":"acae5df5bb3108ddc3fdf1b7034c5c597cd83563edab7c5d2af3f8e25a599f73","source":{"kind":"arxiv","id":"1903.09868","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.09868","created_at":"2026-05-17T23:50:35Z"},{"alias_kind":"arxiv_version","alias_value":"1903.09868v1","created_at":"2026-05-17T23:50:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.09868","created_at":"2026-05-17T23:50:35Z"},{"alias_kind":"pith_short_12","alias_value":"VSXF35N3GEEN","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"VSXF35N3GEEN3Q75","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"VSXF35N3","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:VSXF35N3GEEN3Q756G3QGTC4LF","target":"record","payload":{"canonical_record":{"source":{"id":"1903.09868","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-03-23T19:14:53Z","cross_cats_sorted":[],"title_canon_sha256":"c30b59dd711d63251156f55890a591716c078fd397d7e3eb1bffec1084bb044f","abstract_canon_sha256":"e9159e0c9a9ac5e7d834fe57b31e5ff9c3b1ab0397e6f2d09fbc48dbfd09d621"},"schema_version":"1.0"},"canonical_sha256":"acae5df5bb3108ddc3fdf1b7034c5c597cd83563edab7c5d2af3f8e25a599f73","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:35.231507Z","signature_b64":"KBcdrEf8fO0ROCTbWXs8lmkZ9KxqOvJr2NTFPjnpygwJs1A5qLvnj5RCj7BqAZ0IrDxWc5hMLwdZDjkQ+dYcBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"acae5df5bb3108ddc3fdf1b7034c5c597cd83563edab7c5d2af3f8e25a599f73","last_reissued_at":"2026-05-17T23:50:35.231081Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:35.231081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.09868","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":"2026-05-17T23:50:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ha0o+A5FOu3gTkR0i69nUld1CJxqgOX3L76qrpWr39GlibBc1wwthPgPw4v04w1UbHNRdEvqCuT4/X0XpisiBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:51:40.001187Z"},"content_sha256":"b702335bb90751b9e945e1af7888b575ff0540b9f88ed0ed1574584bb4d92b73","schema_version":"1.0","event_id":"sha256:b702335bb90751b9e945e1af7888b575ff0540b9f88ed0ed1574584bb4d92b73"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:VSXF35N3GEEN3Q756G3QGTC4LF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"StartNet: Online Detection of Action Start in Untrimmed Videos","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Caiming Xiong, Larry S. Davis, Mingfei Gao, Mingze Xu, Richard Socher","submitted_at":"2019-03-23T19:14:53Z","abstract_excerpt":"We propose StartNet to address Online Detection of Action Start (ODAS) where action starts and their associated categories are detected in untrimmed, streaming videos. Previous methods aim to localize action starts by learning feature representations that can directly separate the start point from its preceding background. It is challenging due to the subtle appearance difference near the action starts and the lack of training data. Instead, StartNet decomposes ODAS into two stages: action classification (using ClsNet) and start point localization (using LocNet). ClsNet focuses on per-frame la"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.09868","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":"2026-05-17T23:50:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fxDkRf3bfkuMYIHLq1fr88kmPadSSGv3IDFYhD+AjmL4yX2m6tPWHwQXwy2h9PozfYOXAf8X1mOC8gxOwVGgBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:51:40.001840Z"},"content_sha256":"63da5ff91e1bb049f45d1ebd2fdfee4611c2ada49bbe0b9ae3062bf6eac06824","schema_version":"1.0","event_id":"sha256:63da5ff91e1bb049f45d1ebd2fdfee4611c2ada49bbe0b9ae3062bf6eac06824"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VSXF35N3GEEN3Q756G3QGTC4LF/bundle.json","state_url":"https://pith.science/pith/VSXF35N3GEEN3Q756G3QGTC4LF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VSXF35N3GEEN3Q756G3QGTC4LF/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":"2026-05-27T20:51:40Z","links":{"resolver":"https://pith.science/pith/VSXF35N3GEEN3Q756G3QGTC4LF","bundle":"https://pith.science/pith/VSXF35N3GEEN3Q756G3QGTC4LF/bundle.json","state":"https://pith.science/pith/VSXF35N3GEEN3Q756G3QGTC4LF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VSXF35N3GEEN3Q756G3QGTC4LF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:VSXF35N3GEEN3Q756G3QGTC4LF","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":"e9159e0c9a9ac5e7d834fe57b31e5ff9c3b1ab0397e6f2d09fbc48dbfd09d621","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-03-23T19:14:53Z","title_canon_sha256":"c30b59dd711d63251156f55890a591716c078fd397d7e3eb1bffec1084bb044f"},"schema_version":"1.0","source":{"id":"1903.09868","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.09868","created_at":"2026-05-17T23:50:35Z"},{"alias_kind":"arxiv_version","alias_value":"1903.09868v1","created_at":"2026-05-17T23:50:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.09868","created_at":"2026-05-17T23:50:35Z"},{"alias_kind":"pith_short_12","alias_value":"VSXF35N3GEEN","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"VSXF35N3GEEN3Q75","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"VSXF35N3","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:63da5ff91e1bb049f45d1ebd2fdfee4611c2ada49bbe0b9ae3062bf6eac06824","target":"graph","created_at":"2026-05-17T23:50:35Z","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 propose StartNet to address Online Detection of Action Start (ODAS) where action starts and their associated categories are detected in untrimmed, streaming videos. Previous methods aim to localize action starts by learning feature representations that can directly separate the start point from its preceding background. It is challenging due to the subtle appearance difference near the action starts and the lack of training data. Instead, StartNet decomposes ODAS into two stages: action classification (using ClsNet) and start point localization (using LocNet). ClsNet focuses on per-frame la","authors_text":"Caiming Xiong, Larry S. Davis, Mingfei Gao, Mingze Xu, Richard Socher","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-03-23T19:14:53Z","title":"StartNet: Online Detection of Action Start in Untrimmed Videos"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.09868","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:b702335bb90751b9e945e1af7888b575ff0540b9f88ed0ed1574584bb4d92b73","target":"record","created_at":"2026-05-17T23:50:35Z","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":"e9159e0c9a9ac5e7d834fe57b31e5ff9c3b1ab0397e6f2d09fbc48dbfd09d621","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-03-23T19:14:53Z","title_canon_sha256":"c30b59dd711d63251156f55890a591716c078fd397d7e3eb1bffec1084bb044f"},"schema_version":"1.0","source":{"id":"1903.09868","kind":"arxiv","version":1}},"canonical_sha256":"acae5df5bb3108ddc3fdf1b7034c5c597cd83563edab7c5d2af3f8e25a599f73","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"acae5df5bb3108ddc3fdf1b7034c5c597cd83563edab7c5d2af3f8e25a599f73","first_computed_at":"2026-05-17T23:50:35.231081Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:35.231081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KBcdrEf8fO0ROCTbWXs8lmkZ9KxqOvJr2NTFPjnpygwJs1A5qLvnj5RCj7BqAZ0IrDxWc5hMLwdZDjkQ+dYcBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:35.231507Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.09868","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b702335bb90751b9e945e1af7888b575ff0540b9f88ed0ed1574584bb4d92b73","sha256:63da5ff91e1bb049f45d1ebd2fdfee4611c2ada49bbe0b9ae3062bf6eac06824"],"state_sha256":"eeae358cea882273426b1899386a55406e854fdb30539162d1c6de6e935eb46b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a+sR8HmjNcXhCZgQXBjj/Op/MzHA6w86hbGrJWhda9GOjCmx2uR7cZGg5zwvSc1yCbQbjSv5VJP9+6FF8EvyAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T20:51:40.005002Z","bundle_sha256":"0eb28216fd7275cefe85b46438e38a071bdc6a1cf288e4d15633830cffb47d82"}}