{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:7AVK6SPZAG4QO223SNFXRFHHDM","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":"657de39694b54e4dec7be9fba4f0bed14ee964e33e69866a2275e2b1e199f600","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-17T11:55:04Z","title_canon_sha256":"fac9d01d0eb9b5fb33d9fc083e617938b2cc0682d1d236db8561f4bf9de1bee8"},"schema_version":"1.0","source":{"id":"1810.07491","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.07491","created_at":"2026-05-18T00:02:56Z"},{"alias_kind":"arxiv_version","alias_value":"1810.07491v1","created_at":"2026-05-18T00:02:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.07491","created_at":"2026-05-18T00:02:56Z"},{"alias_kind":"pith_short_12","alias_value":"7AVK6SPZAG4Q","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_16","alias_value":"7AVK6SPZAG4QO223","created_at":"2026-05-18T12:32:11Z"},{"alias_kind":"pith_short_8","alias_value":"7AVK6SPZ","created_at":"2026-05-18T12:32:11Z"}],"graph_snapshots":[{"event_id":"sha256:d29b5fd3aafa854f613eadd3cdd72fa954214ae6337b988a27917c3bdc5e72d1","target":"graph","created_at":"2026-05-18T00:02:56Z","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":"Biometric authentication by means of handwritten signatures is a challenging pattern recognition task, which aims to infer a writer model from only a handful of genuine signatures. In order to make it more difficult for a forger to attack the verification system, a promising strategy is to combine different writer models. In this work, we propose to complement a recent structural approach to offline signature verification based on graph edit distance with a statistical approach based on metric learning with deep neural networks. On the MCYT and GPDS benchmark datasets, we demonstrate that comb","authors_text":"Andreas Fischer, Kaspar Riesen, Marcus Liwicki, Michele Alberti, Paul Maergner, Rolf Ingold, Vinaychandran Pondenkandath","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-17T11:55:04Z","title":"Offline Signature Verification by Combining Graph Edit Distance and Triplet Networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.07491","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":"sha256:49f0dd02e207c868afb75306b60063fe9e94e3f455841d07b4da97ebd1df0a45","target":"record","created_at":"2026-05-18T00:02:56Z","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":"657de39694b54e4dec7be9fba4f0bed14ee964e33e69866a2275e2b1e199f600","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-17T11:55:04Z","title_canon_sha256":"fac9d01d0eb9b5fb33d9fc083e617938b2cc0682d1d236db8561f4bf9de1bee8"},"schema_version":"1.0","source":{"id":"1810.07491","kind":"arxiv","version":1}},"canonical_sha256":"f82aaf49f901b9076b5b934b7894e71b007c75d91017e6d5ef4d2f98bc8c4d6c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f82aaf49f901b9076b5b934b7894e71b007c75d91017e6d5ef4d2f98bc8c4d6c","first_computed_at":"2026-05-18T00:02:56.210218Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:56.210218Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"enTUlfTDsnUrjO4crULPdEB834oAJA+6jxRB+NgpVwQqwST7na8Y4pl2T+SvIvbh8lKMEnC84kSEqCFP7boDAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:56.211032Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.07491","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:49f0dd02e207c868afb75306b60063fe9e94e3f455841d07b4da97ebd1df0a45","sha256:d29b5fd3aafa854f613eadd3cdd72fa954214ae6337b988a27917c3bdc5e72d1"],"state_sha256":"861ea2a3d4911b2cf8809cd23489224b7e656dca201beed4779b64462b463116"}