{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2PG3TG5M6BI7YJH63M6BLEIFTP","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":"001ac039dba1a94852e79f579d5446bb9326b1847d2e0c8dd71c5776d0b8803d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-04-03T03:29:48Z","title_canon_sha256":"ad3c65e6b8f8cd7daadb654abc6aa678d6583b44e0513745e70c8d8b9693e3e8"},"schema_version":"1.0","source":{"id":"1904.01748","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.01748","created_at":"2026-05-17T23:49:29Z"},{"alias_kind":"arxiv_version","alias_value":"1904.01748v1","created_at":"2026-05-17T23:49:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.01748","created_at":"2026-05-17T23:49:29Z"},{"alias_kind":"pith_short_12","alias_value":"2PG3TG5M6BI7","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2PG3TG5M6BI7YJH6","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2PG3TG5M","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:1850433b8b53bc397d01214d6fc8f69f2103f9b30f45e5491034f063407d87d4","target":"graph","created_at":"2026-05-17T23:49:29Z","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":"Owing to the development and advancement of artificial intelligence, numerous works were established in the human facial expression recognition system. Meanwhile, the detection and classification of micro-expressions are attracting attentions from various research communities in the recent few years. In this paper, we first review the processes of a conventional optical-flow-based recognition system, which comprised of facial landmarks annotations, optical flow guided images computation, features extraction and emotion class categorization. Secondly, a few approaches have been proposed to impr","authors_text":"Danna Zheng, Han-Zhe Zhang, Hao-Xuan Xua, Kun-hong Liu, Ran-Ke Lyu, Shu-Meng Lic, Sze-Teng Liong, Y.S. Gan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-04-03T03:29:48Z","title":"Evaluation of the Spatio-Temporal features and GAN for Micro-expression Recognition System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.01748","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":"sha256:00bc416b46354d0f6af405ae618145164f71316b8447f856decfc6e32b2deca1","target":"record","created_at":"2026-05-17T23:49:29Z","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":"001ac039dba1a94852e79f579d5446bb9326b1847d2e0c8dd71c5776d0b8803d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-04-03T03:29:48Z","title_canon_sha256":"ad3c65e6b8f8cd7daadb654abc6aa678d6583b44e0513745e70c8d8b9693e3e8"},"schema_version":"1.0","source":{"id":"1904.01748","kind":"arxiv","version":1}},"canonical_sha256":"d3cdb99bacf051fc24fedb3c1591059be6f40d0ec42601cc8737f7d3c00f673c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d3cdb99bacf051fc24fedb3c1591059be6f40d0ec42601cc8737f7d3c00f673c","first_computed_at":"2026-05-17T23:49:29.806250Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:29.806250Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6mPxlFZb4mkiL7ruKeyA00VrXj9SoF9b9zo2FsjBWJicCZsDyJM+/Z4/Iw8VvrTmunAnoV0g+8MmgbVuRqlZDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:29.806854Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.01748","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:00bc416b46354d0f6af405ae618145164f71316b8447f856decfc6e32b2deca1","sha256:1850433b8b53bc397d01214d6fc8f69f2103f9b30f45e5491034f063407d87d4"],"state_sha256":"7e5ae0b8fd51fca4e9ed5af67ff57e958572c527c8957dda9e1cd04f673aa38b"}