{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:R5LJ3NXXRY55F7FB6QR6TXTOE7","short_pith_number":"pith:R5LJ3NXX","canonical_record":{"source":{"id":"1807.06772","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-07-18T04:29:20Z","cross_cats_sorted":[],"title_canon_sha256":"b960f9b9b27371b30520a82f5fa4208965f9246e29dbb20dc041b7aac5b81ac3","abstract_canon_sha256":"c8a9801a40d2b91341d02cb9f05b472911713cb9f67a0907fb66b67b9722bde3"},"schema_version":"1.0"},"canonical_sha256":"8f569db6f78e3bd2fca1f423e9de6e27e4ff2578e41f2df43f97e8d97286f3b3","source":{"kind":"arxiv","id":"1807.06772","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.06772","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"1807.06772v1","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.06772","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"R5LJ3NXXRY55","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"R5LJ3NXXRY55F7FB","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"R5LJ3NXX","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:R5LJ3NXXRY55F7FB6QR6TXTOE7","target":"record","payload":{"canonical_record":{"source":{"id":"1807.06772","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-07-18T04:29:20Z","cross_cats_sorted":[],"title_canon_sha256":"b960f9b9b27371b30520a82f5fa4208965f9246e29dbb20dc041b7aac5b81ac3","abstract_canon_sha256":"c8a9801a40d2b91341d02cb9f05b472911713cb9f67a0907fb66b67b9722bde3"},"schema_version":"1.0"},"canonical_sha256":"8f569db6f78e3bd2fca1f423e9de6e27e4ff2578e41f2df43f97e8d97286f3b3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:10:25.822862Z","signature_b64":"iLWPc0VNP49xZTUwMc5XdkUjOJg+8LpR3MOPHaJJQHhXQLjOMbIKsxdvimcJ5f0IkxM9xPYQO6TJ6cvH2AcSDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8f569db6f78e3bd2fca1f423e9de6e27e4ff2578e41f2df43f97e8d97286f3b3","last_reissued_at":"2026-05-18T00:10:25.822332Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:10:25.822332Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.06772","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":"2026-05-18T00:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LlB0fZBL2wHR7NogzD0wLxxPTBCRr8uZFc0ayNUNFKrn68lnscBWVFSIemdw5ms0/V0we3Qp86kvpcDy/cq9DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:32:05.751593Z"},"content_sha256":"774dfd6816ff77419725578c3df3019eb45e2d28817cd70a2e77b5bcb99ee66d","schema_version":"1.0","event_id":"sha256:774dfd6816ff77419725578c3df3019eb45e2d28817cd70a2e77b5bcb99ee66d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:R5LJ3NXXRY55F7FB6QR6TXTOE7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bag-of-Visual-Words for Signature-Based Multi-Script Document Retrieval","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Michael Blumenstein, Partha Pratim Roy, Ranju Mandal, Umapada Pal","submitted_at":"2018-07-18T04:29:20Z","abstract_excerpt":"An end-to-end architecture for multi-script document retrieval using handwritten signatures is proposed in this paper. The user supplies a query signature sample and the system exclusively returns a set of documents that contain the query signature. In the first stage, a component-wise classification technique separates the potential signature components from all other components. A bag-of-visual-words powered by SIFT descriptors in a patch-based framework is proposed to compute the features and a Support Vector Machine (SVM)-based classifier was used to separate signatures from the documents."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.06772","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":""},"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":"2026-05-18T00:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hpD0YenUjom6C9hjlmMywF4eujZWKwC+UUpyX8ZMViC5mud9amo8SMBbbNlp6J2MIQJ6kjYMzocKhXRRoC5mDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T04:32:05.751965Z"},"content_sha256":"f30e3c1bb74e71f232aafe079ed1db5e428bb1311abf7d6a59a3fff82bc443b1","schema_version":"1.0","event_id":"sha256:f30e3c1bb74e71f232aafe079ed1db5e428bb1311abf7d6a59a3fff82bc443b1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R5LJ3NXXRY55F7FB6QR6TXTOE7/bundle.json","state_url":"https://pith.science/pith/R5LJ3NXXRY55F7FB6QR6TXTOE7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R5LJ3NXXRY55F7FB6QR6TXTOE7/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":"2026-05-26T04:32:05Z","links":{"resolver":"https://pith.science/pith/R5LJ3NXXRY55F7FB6QR6TXTOE7","bundle":"https://pith.science/pith/R5LJ3NXXRY55F7FB6QR6TXTOE7/bundle.json","state":"https://pith.science/pith/R5LJ3NXXRY55F7FB6QR6TXTOE7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R5LJ3NXXRY55F7FB6QR6TXTOE7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:R5LJ3NXXRY55F7FB6QR6TXTOE7","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":"c8a9801a40d2b91341d02cb9f05b472911713cb9f67a0907fb66b67b9722bde3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-07-18T04:29:20Z","title_canon_sha256":"b960f9b9b27371b30520a82f5fa4208965f9246e29dbb20dc041b7aac5b81ac3"},"schema_version":"1.0","source":{"id":"1807.06772","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.06772","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"1807.06772v1","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.06772","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"R5LJ3NXXRY55","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"R5LJ3NXXRY55F7FB","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"R5LJ3NXX","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:f30e3c1bb74e71f232aafe079ed1db5e428bb1311abf7d6a59a3fff82bc443b1","target":"graph","created_at":"2026-05-18T00:10:25Z","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":"An end-to-end architecture for multi-script document retrieval using handwritten signatures is proposed in this paper. The user supplies a query signature sample and the system exclusively returns a set of documents that contain the query signature. In the first stage, a component-wise classification technique separates the potential signature components from all other components. A bag-of-visual-words powered by SIFT descriptors in a patch-based framework is proposed to compute the features and a Support Vector Machine (SVM)-based classifier was used to separate signatures from the documents.","authors_text":"Michael Blumenstein, Partha Pratim Roy, Ranju Mandal, Umapada Pal","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-07-18T04:29:20Z","title":"Bag-of-Visual-Words for Signature-Based Multi-Script Document Retrieval"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.06772","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":"sha256:774dfd6816ff77419725578c3df3019eb45e2d28817cd70a2e77b5bcb99ee66d","target":"record","created_at":"2026-05-18T00:10:25Z","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":"c8a9801a40d2b91341d02cb9f05b472911713cb9f67a0907fb66b67b9722bde3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-07-18T04:29:20Z","title_canon_sha256":"b960f9b9b27371b30520a82f5fa4208965f9246e29dbb20dc041b7aac5b81ac3"},"schema_version":"1.0","source":{"id":"1807.06772","kind":"arxiv","version":1}},"canonical_sha256":"8f569db6f78e3bd2fca1f423e9de6e27e4ff2578e41f2df43f97e8d97286f3b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8f569db6f78e3bd2fca1f423e9de6e27e4ff2578e41f2df43f97e8d97286f3b3","first_computed_at":"2026-05-18T00:10:25.822332Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:25.822332Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iLWPc0VNP49xZTUwMc5XdkUjOJg+8LpR3MOPHaJJQHhXQLjOMbIKsxdvimcJ5f0IkxM9xPYQO6TJ6cvH2AcSDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:25.822862Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.06772","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:774dfd6816ff77419725578c3df3019eb45e2d28817cd70a2e77b5bcb99ee66d","sha256:f30e3c1bb74e71f232aafe079ed1db5e428bb1311abf7d6a59a3fff82bc443b1"],"state_sha256":"506d003c0eb1deefb6595688a683fc017d94f4704d337246af475044409f72f4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3K7hXFSqFjr/cx0Uv+qQjRATsSIuNvg5/iRlSVOSW0OAAIu34sxmwaCe2GzhueYdVlo4y1bX5JbaDfCK2VpsCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T04:32:05.754819Z","bundle_sha256":"9cb8955a48830928c7023c4fded3e5242c9993f1f1d170aada22aff03108a66f"}}