{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:QNIF7RXR2CVG5XTJJ462NGLWGX","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":"51156c8c10931d74eb388340e326196f9bd75864a3f28c20fb4426af6b3b3ec2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-03-27T12:14:04Z","title_canon_sha256":"ff13107cbcba23df775752c0c0db580af9213799403f43df1ca234ec98acb60b"},"schema_version":"1.0","source":{"id":"2103.14887","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.14887","created_at":"2026-07-05T02:27:55Z"},{"alias_kind":"arxiv_version","alias_value":"2103.14887v2","created_at":"2026-07-05T02:27:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.14887","created_at":"2026-07-05T02:27:55Z"},{"alias_kind":"pith_short_12","alias_value":"QNIF7RXR2CVG","created_at":"2026-07-05T02:27:55Z"},{"alias_kind":"pith_short_16","alias_value":"QNIF7RXR2CVG5XTJ","created_at":"2026-07-05T02:27:55Z"},{"alias_kind":"pith_short_8","alias_value":"QNIF7RXR","created_at":"2026-07-05T02:27:55Z"}],"graph_snapshots":[{"event_id":"sha256:1f1e49bbf6d3bae65ec589dd0930ea988572e0d06b261d6546f8ea1314ccefd5","target":"graph","created_at":"2026-07-05T02:27:55Z","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/2103.14887/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper proposes a novel training model based on shape and appearance features for object segmentation in images and videos. Whereas most such models rely on two-dimensional appearance templates or a finite set of descriptors, our appearance-based feature is a one-dimensional function, which is efficiently coupled with the object's shape by integrating intensities along the object's iso-contours. Joint PCA training on these shape and appearance features further exploits shape-appearance correlations and the resulting training model is incorporated in an active-contour-type energy functional","authors_text":"Anthony Yezzi, Martin Mueller, Navdeep Dahiya","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-03-27T12:14:04Z","title":"An Efficiently Coupled Shape and Appearance Prior for Active Contour Segmentation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.14887","kind":"arxiv","version":2},"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":"sha256:753c879f799cc27d9832acff3d913ed2765f1aa5e2676da50318d086a50111cd","target":"record","created_at":"2026-07-05T02:27:55Z","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":"51156c8c10931d74eb388340e326196f9bd75864a3f28c20fb4426af6b3b3ec2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-03-27T12:14:04Z","title_canon_sha256":"ff13107cbcba23df775752c0c0db580af9213799403f43df1ca234ec98acb60b"},"schema_version":"1.0","source":{"id":"2103.14887","kind":"arxiv","version":2}},"canonical_sha256":"83505fc6f1d0aa6ede694f3da6997635d69e8c05083002f655fa0e0ab064744d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"83505fc6f1d0aa6ede694f3da6997635d69e8c05083002f655fa0e0ab064744d","first_computed_at":"2026-07-05T02:27:55.904466Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:27:55.904466Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EOmARos4Sb/a+eX+8UZfcNuoCX3hNXCULPMbHh+0G85cWUaF10jF6fsTB1acCu+YEBsyryK/uJn1yVHT1PrsCg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:27:55.904895Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.14887","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:753c879f799cc27d9832acff3d913ed2765f1aa5e2676da50318d086a50111cd","sha256:1f1e49bbf6d3bae65ec589dd0930ea988572e0d06b261d6546f8ea1314ccefd5"],"state_sha256":"59bc19c7b5de83354dee771140dcb2dd610abd33e98277402d63dcd7c08723c6"}