{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:GFCXKUU7JEX3QFU6PI5JKQT6OY","short_pith_number":"pith:GFCXKUU7","canonical_record":{"source":{"id":"2111.01936","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T23:04:39Z","cross_cats_sorted":[],"title_canon_sha256":"75f6d8de4356f3aa095317887feebb558e1bb92614f71416b8ddf504cae1d73c","abstract_canon_sha256":"14e6eb26475b97d2c3191ae9ddf7a98563bb75657875e03fbaf3dfd3854f75bb"},"schema_version":"1.0"},"canonical_sha256":"314575529f492fb8169e7a3a95427e7635adee3190dbe989d514cbee42674862","source":{"kind":"arxiv","id":"2111.01936","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.01936","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"arxiv_version","alias_value":"2111.01936v1","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.01936","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"pith_short_12","alias_value":"GFCXKUU7JEX3","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"pith_short_16","alias_value":"GFCXKUU7JEX3QFU6","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"pith_short_8","alias_value":"GFCXKUU7","created_at":"2026-07-05T03:28:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:GFCXKUU7JEX3QFU6PI5JKQT6OY","target":"record","payload":{"canonical_record":{"source":{"id":"2111.01936","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T23:04:39Z","cross_cats_sorted":[],"title_canon_sha256":"75f6d8de4356f3aa095317887feebb558e1bb92614f71416b8ddf504cae1d73c","abstract_canon_sha256":"14e6eb26475b97d2c3191ae9ddf7a98563bb75657875e03fbaf3dfd3854f75bb"},"schema_version":"1.0"},"canonical_sha256":"314575529f492fb8169e7a3a95427e7635adee3190dbe989d514cbee42674862","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:28:44.420363Z","signature_b64":"giJsG+ZxCahtagWpF6HcAmYUdW0PhXEoTJXw1i9oyKGYTQ/DB+KnhfCuQhqq++chCeixbr6NQcHjix1KZO+tCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"314575529f492fb8169e7a3a95427e7635adee3190dbe989d514cbee42674862","last_reissued_at":"2026-07-05T03:28:44.419951Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:28:44.419951Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2111.01936","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":"2026-07-05T03:28:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kBLyKMENBethvC1vczGPwcvLYnh416RyFGtVuIm5wCz3UQPPtzvRAmhoROv6VCTD79gq3wwqAQbAlAYC9KNTCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T17:41:24.345125Z"},"content_sha256":"672ab0d924d7224300df1a3fecfda4c41e947ad0390f54e36768ede1d3a6ac3a","schema_version":"1.0","event_id":"sha256:672ab0d924d7224300df1a3fecfda4c41e947ad0390f54e36768ede1d3a6ac3a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:GFCXKUU7JEX3QFU6PI5JKQT6OY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Revisiting spatio-temporal layouts for compositional action recognition","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Gorjan Radevski, Marie-Francine Moens, Tinne Tuytelaars","submitted_at":"2021-11-02T23:04:39Z","abstract_excerpt":"Recognizing human actions is fundamentally a spatio-temporal reasoning problem, and should be, at least to some extent, invariant to the appearance of the human and the objects involved. Motivated by this hypothesis, in this work, we take an object-centric approach to action recognition. Multiple works have studied this setting before, yet it remains unclear (i) how well a carefully crafted, spatio-temporal layout-based method can recognize human actions, and (ii) how, and when, to fuse the information from layout and appearance-based models. The main focus of this paper is compositional/few-s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.01936","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/2111.01936/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":"2026-07-05T03:28:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BlElNiu4w1vX/J4F/nIDQls//DCtfwyK6pxyAYcORxnYGv2pP/G1XbQZzYYTA5uLANbFlys9Gkd18ADXt0JQAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T17:41:24.345703Z"},"content_sha256":"0da88baa5adf52765058641b6a711a4159bdafba0b0b41ee5581943e1c0ecfb2","schema_version":"1.0","event_id":"sha256:0da88baa5adf52765058641b6a711a4159bdafba0b0b41ee5581943e1c0ecfb2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GFCXKUU7JEX3QFU6PI5JKQT6OY/bundle.json","state_url":"https://pith.science/pith/GFCXKUU7JEX3QFU6PI5JKQT6OY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GFCXKUU7JEX3QFU6PI5JKQT6OY/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":"2026-08-08T17:41:24Z","links":{"resolver":"https://pith.science/pith/GFCXKUU7JEX3QFU6PI5JKQT6OY","bundle":"https://pith.science/pith/GFCXKUU7JEX3QFU6PI5JKQT6OY/bundle.json","state":"https://pith.science/pith/GFCXKUU7JEX3QFU6PI5JKQT6OY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GFCXKUU7JEX3QFU6PI5JKQT6OY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:GFCXKUU7JEX3QFU6PI5JKQT6OY","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":"14e6eb26475b97d2c3191ae9ddf7a98563bb75657875e03fbaf3dfd3854f75bb","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T23:04:39Z","title_canon_sha256":"75f6d8de4356f3aa095317887feebb558e1bb92614f71416b8ddf504cae1d73c"},"schema_version":"1.0","source":{"id":"2111.01936","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2111.01936","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"arxiv_version","alias_value":"2111.01936v1","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2111.01936","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"pith_short_12","alias_value":"GFCXKUU7JEX3","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"pith_short_16","alias_value":"GFCXKUU7JEX3QFU6","created_at":"2026-07-05T03:28:44Z"},{"alias_kind":"pith_short_8","alias_value":"GFCXKUU7","created_at":"2026-07-05T03:28:44Z"}],"graph_snapshots":[{"event_id":"sha256:0da88baa5adf52765058641b6a711a4159bdafba0b0b41ee5581943e1c0ecfb2","target":"graph","created_at":"2026-07-05T03:28:44Z","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/2111.01936/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Recognizing human actions is fundamentally a spatio-temporal reasoning problem, and should be, at least to some extent, invariant to the appearance of the human and the objects involved. Motivated by this hypothesis, in this work, we take an object-centric approach to action recognition. Multiple works have studied this setting before, yet it remains unclear (i) how well a carefully crafted, spatio-temporal layout-based method can recognize human actions, and (ii) how, and when, to fuse the information from layout and appearance-based models. The main focus of this paper is compositional/few-s","authors_text":"Gorjan Radevski, Marie-Francine Moens, Tinne Tuytelaars","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T23:04:39Z","title":"Revisiting spatio-temporal layouts for compositional action recognition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2111.01936","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":"sha256:672ab0d924d7224300df1a3fecfda4c41e947ad0390f54e36768ede1d3a6ac3a","target":"record","created_at":"2026-07-05T03:28:44Z","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":"14e6eb26475b97d2c3191ae9ddf7a98563bb75657875e03fbaf3dfd3854f75bb","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-11-02T23:04:39Z","title_canon_sha256":"75f6d8de4356f3aa095317887feebb558e1bb92614f71416b8ddf504cae1d73c"},"schema_version":"1.0","source":{"id":"2111.01936","kind":"arxiv","version":1}},"canonical_sha256":"314575529f492fb8169e7a3a95427e7635adee3190dbe989d514cbee42674862","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"314575529f492fb8169e7a3a95427e7635adee3190dbe989d514cbee42674862","first_computed_at":"2026-07-05T03:28:44.419951Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:28:44.419951Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"giJsG+ZxCahtagWpF6HcAmYUdW0PhXEoTJXw1i9oyKGYTQ/DB+KnhfCuQhqq++chCeixbr6NQcHjix1KZO+tCg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:28:44.420363Z","signed_message":"canonical_sha256_bytes"},"source_id":"2111.01936","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:672ab0d924d7224300df1a3fecfda4c41e947ad0390f54e36768ede1d3a6ac3a","sha256:0da88baa5adf52765058641b6a711a4159bdafba0b0b41ee5581943e1c0ecfb2"],"state_sha256":"6f3f3429b6a202e2303c28be2a39f800506f1a4179480c1e5e91cd903d2503a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eM+hdx/rwX/1jba+lqgkJtVmb8p9b9lUzubU1o2bKmQRxshqplWJXAM0J3Wm0l5p1LQjnRZZbXQ+BFl9payUBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T17:41:24.349101Z","bundle_sha256":"1114a451e892a8831d97ac1f67521f790117853a6e36bea5e25ca1c17bf0c9d7"}}