{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:LIARF5VFCUEB7XVR4NIOZRVNDZ","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":"7a3d7826e21ce2239cb78730b76e1821ca434f32d1690d8d3cac7616ddccb9a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-02-03T03:42:10Z","title_canon_sha256":"2ff298a050fdfad9a6cc6f45df43717107f4bbcbdf4c9bc89ef642002c593927"},"schema_version":"1.0","source":{"id":"1502.00723","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.00723","created_at":"2026-05-18T02:28:04Z"},{"alias_kind":"arxiv_version","alias_value":"1502.00723v1","created_at":"2026-05-18T02:28:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.00723","created_at":"2026-05-18T02:28:04Z"},{"alias_kind":"pith_short_12","alias_value":"LIARF5VFCUEB","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_16","alias_value":"LIARF5VFCUEB7XVR","created_at":"2026-05-18T12:29:29Z"},{"alias_kind":"pith_short_8","alias_value":"LIARF5VF","created_at":"2026-05-18T12:29:29Z"}],"graph_snapshots":[{"event_id":"sha256:a3508600c4e400d5dad84401736e83130731290f6c901c0b1db3de55a7575c3d","target":"graph","created_at":"2026-05-18T02:28:04Z","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":"This paper proposes a simple yet effective method to learn the hierarchical object shape model consisting of local contour fragments, which represents a category of shapes in the form of an And-Or tree. This model extends the traditional hierarchical tree structures by introducing the \"switch\" variables (i.e. the or-nodes) that explicitly specify production rules to capture shape variations. We thus define the model with three layers: the leaf-nodes for detecting local contour fragments, the or-nodes specifying selection of leaf-nodes, and the root-node encoding the holistic distortion. In the","authors_text":"Jianhuang Lai, Liang Lin, Wei Yang, Xiaolong Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-02-03T03:42:10Z","title":"Learning Contour-Fragment-based Shape Model with And-Or Tree Representation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00723","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":"sha256:221d639f3b8d0fb05ec751bd11a26a1e8ef2cd4809bcca5c00a0f9d724a1c3c7","target":"record","created_at":"2026-05-18T02:28:04Z","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":"7a3d7826e21ce2239cb78730b76e1821ca434f32d1690d8d3cac7616ddccb9a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-02-03T03:42:10Z","title_canon_sha256":"2ff298a050fdfad9a6cc6f45df43717107f4bbcbdf4c9bc89ef642002c593927"},"schema_version":"1.0","source":{"id":"1502.00723","kind":"arxiv","version":1}},"canonical_sha256":"5a0112f6a515081fdeb1e350ecc6ad1e6b99694a4ae273348e100043165f87c3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a0112f6a515081fdeb1e350ecc6ad1e6b99694a4ae273348e100043165f87c3","first_computed_at":"2026-05-18T02:28:04.494294Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:28:04.494294Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HIZ4fsx9fibV4fu1539VweMk24rJAT6IlwGmzo/krYHKDUgvq0FqyjWykQIAL1a21qoRMj60RQ4l5R65YxN/Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:28:04.494772Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.00723","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:221d639f3b8d0fb05ec751bd11a26a1e8ef2cd4809bcca5c00a0f9d724a1c3c7","sha256:a3508600c4e400d5dad84401736e83130731290f6c901c0b1db3de55a7575c3d"],"state_sha256":"c437110736dcc023afde6e98a1e84f2fe6926bb2a6e5f0bfddbeeb29d77cdc9a"}