{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:YB7XTZJGVA6Q6HVJS5DSMJFUPU","short_pith_number":"pith:YB7XTZJG","canonical_record":{"source":{"id":"2202.10207","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-02-21T13:32:09Z","cross_cats_sorted":[],"title_canon_sha256":"20cccf52a9c6e4342c7dd2dfd1054c6692eeeff4acf1c29cbfdd9a8a6630e4f6","abstract_canon_sha256":"30055b08d107df2499e5a8e9ad487a65d60ba824c2c181b9b9669bca056e9b64"},"schema_version":"1.0"},"canonical_sha256":"c07f79e526a83d0f1ea997472624b47d1a37d075619bfe00b193f9d05f2fd48d","source":{"kind":"arxiv","id":"2202.10207","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.10207","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"arxiv_version","alias_value":"2202.10207v2","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.10207","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"pith_short_12","alias_value":"YB7XTZJGVA6Q","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"pith_short_16","alias_value":"YB7XTZJGVA6Q6HVJ","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"pith_short_8","alias_value":"YB7XTZJG","created_at":"2026-07-05T07:06:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:YB7XTZJGVA6Q6HVJS5DSMJFUPU","target":"record","payload":{"canonical_record":{"source":{"id":"2202.10207","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-02-21T13:32:09Z","cross_cats_sorted":[],"title_canon_sha256":"20cccf52a9c6e4342c7dd2dfd1054c6692eeeff4acf1c29cbfdd9a8a6630e4f6","abstract_canon_sha256":"30055b08d107df2499e5a8e9ad487a65d60ba824c2c181b9b9669bca056e9b64"},"schema_version":"1.0"},"canonical_sha256":"c07f79e526a83d0f1ea997472624b47d1a37d075619bfe00b193f9d05f2fd48d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:06:18.056470Z","signature_b64":"iRKgzATos8A6Yak7RgSPPmTBlvCE8AGzl8RrKbN4mWQKW8ZzlOwGLnzfOnI8Q/tmprs05QXjQ4xncs/nTlOeDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c07f79e526a83d0f1ea997472624b47d1a37d075619bfe00b193f9d05f2fd48d","last_reissued_at":"2026-07-05T07:06:18.056028Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:06:18.056028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2202.10207","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:06:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GoDPSMo2FOlK+CELdBtB9fe1qzWZLg4iUFRdagsQgOJd6+E8JWS9hzUV/D+DtisZra+30kGP1zkcN1dUrWE5Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-27T00:36:02.707441Z"},"content_sha256":"f829048ef117fe3b4921c38f690ec1335bc871741af5c447a8df895ee2d4c48f","schema_version":"1.0","event_id":"sha256:f829048ef117fe3b4921c38f690ec1335bc871741af5c447a8df895ee2d4c48f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:YB7XTZJGVA6Q6HVJS5DSMJFUPU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Offline Text-Independent Writer Identification based on word level data","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Suresh Sundaram, Vineet Kumar","submitted_at":"2022-02-21T13:32:09Z","abstract_excerpt":"This paper proposes a novel scheme to identify the authorship of a document based on handwritten input word images of an individual. Our approach is text-independent and does not place any restrictions on the size of the input word images under consideration. To begin with, we employ the SIFT algorithm to extract multiple key points at various levels of abstraction (comprising allograph, character, or combination of characters). These key points are then passed through a trained CNN network to generate feature maps corresponding to a convolution layer. However, owing to the scale corresponding"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.10207","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2202.10207/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T07:06:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jdb+G4I26x3zUtU/WsS0QXO2vtC19OiAXgR8uNVV5b1tkWT8CEdC/BQ5PPdbmV/94PR7xEMJLze6aGSJDvsFBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-27T00:36:02.707820Z"},"content_sha256":"6f6f3b41012ea44ea9acb394eaf57d4e5030385218b47ffba55e5a1b99f786e3","schema_version":"1.0","event_id":"sha256:6f6f3b41012ea44ea9acb394eaf57d4e5030385218b47ffba55e5a1b99f786e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YB7XTZJGVA6Q6HVJS5DSMJFUPU/bundle.json","state_url":"https://pith.science/pith/YB7XTZJGVA6Q6HVJS5DSMJFUPU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YB7XTZJGVA6Q6HVJS5DSMJFUPU/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":"2026-07-27T00:36:02Z","links":{"resolver":"https://pith.science/pith/YB7XTZJGVA6Q6HVJS5DSMJFUPU","bundle":"https://pith.science/pith/YB7XTZJGVA6Q6HVJS5DSMJFUPU/bundle.json","state":"https://pith.science/pith/YB7XTZJGVA6Q6HVJS5DSMJFUPU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YB7XTZJGVA6Q6HVJS5DSMJFUPU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:YB7XTZJGVA6Q6HVJS5DSMJFUPU","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":"30055b08d107df2499e5a8e9ad487a65d60ba824c2c181b9b9669bca056e9b64","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-02-21T13:32:09Z","title_canon_sha256":"20cccf52a9c6e4342c7dd2dfd1054c6692eeeff4acf1c29cbfdd9a8a6630e4f6"},"schema_version":"1.0","source":{"id":"2202.10207","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.10207","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"arxiv_version","alias_value":"2202.10207v2","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.10207","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"pith_short_12","alias_value":"YB7XTZJGVA6Q","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"pith_short_16","alias_value":"YB7XTZJGVA6Q6HVJ","created_at":"2026-07-05T07:06:18Z"},{"alias_kind":"pith_short_8","alias_value":"YB7XTZJG","created_at":"2026-07-05T07:06:18Z"}],"graph_snapshots":[{"event_id":"sha256:6f6f3b41012ea44ea9acb394eaf57d4e5030385218b47ffba55e5a1b99f786e3","target":"graph","created_at":"2026-07-05T07:06:18Z","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/2202.10207/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper proposes a novel scheme to identify the authorship of a document based on handwritten input word images of an individual. Our approach is text-independent and does not place any restrictions on the size of the input word images under consideration. To begin with, we employ the SIFT algorithm to extract multiple key points at various levels of abstraction (comprising allograph, character, or combination of characters). These key points are then passed through a trained CNN network to generate feature maps corresponding to a convolution layer. However, owing to the scale corresponding","authors_text":"Suresh Sundaram, Vineet Kumar","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-02-21T13:32:09Z","title":"Offline Text-Independent Writer Identification based on word level data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.10207","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:f829048ef117fe3b4921c38f690ec1335bc871741af5c447a8df895ee2d4c48f","target":"record","created_at":"2026-07-05T07:06:18Z","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":"30055b08d107df2499e5a8e9ad487a65d60ba824c2c181b9b9669bca056e9b64","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2022-02-21T13:32:09Z","title_canon_sha256":"20cccf52a9c6e4342c7dd2dfd1054c6692eeeff4acf1c29cbfdd9a8a6630e4f6"},"schema_version":"1.0","source":{"id":"2202.10207","kind":"arxiv","version":2}},"canonical_sha256":"c07f79e526a83d0f1ea997472624b47d1a37d075619bfe00b193f9d05f2fd48d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c07f79e526a83d0f1ea997472624b47d1a37d075619bfe00b193f9d05f2fd48d","first_computed_at":"2026-07-05T07:06:18.056028Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:06:18.056028Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iRKgzATos8A6Yak7RgSPPmTBlvCE8AGzl8RrKbN4mWQKW8ZzlOwGLnzfOnI8Q/tmprs05QXjQ4xncs/nTlOeDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T07:06:18.056470Z","signed_message":"canonical_sha256_bytes"},"source_id":"2202.10207","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f829048ef117fe3b4921c38f690ec1335bc871741af5c447a8df895ee2d4c48f","sha256:6f6f3b41012ea44ea9acb394eaf57d4e5030385218b47ffba55e5a1b99f786e3"],"state_sha256":"98371fa48218ebfbe58e2680714982dab489d66d5b9c7b8e2fe8c17abe4edaa6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LLZEUiaYbYFJCL7WYQgYEldL1Q5KWj9esxTGOobVDYlxUoyQzjFl3fVqA/QDdj/sKMJktJJyotWcoZcw5oEuAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-27T00:36:02.710672Z","bundle_sha256":"adc550c418c5e9214e6c71c7b8695b2a197bf7cd7434aec6d469dd2a1ec7e283"}}