{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:UAM2UA5KH4UOMQ4UMPNIGAQ4UX","short_pith_number":"pith:UAM2UA5K","canonical_record":{"source":{"id":"2201.01275","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2022-01-03T08:04:38Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"7260239bc5d3530428a3b17f936f98ad483de54e2132cc29f8578da9040c7418","abstract_canon_sha256":"eac3c274460725f0a224cab0a9acc31c9502f82de82f9c1d43a2c78d631b0567"},"schema_version":"1.0"},"canonical_sha256":"a019aa03aa3f28e6439463da83021ca5f61fc852871fa0ea4100aaacdd8e99d8","source":{"kind":"arxiv","id":"2201.01275","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.01275","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"arxiv_version","alias_value":"2201.01275v1","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.01275","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"pith_short_12","alias_value":"UAM2UA5KH4UO","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"pith_short_16","alias_value":"UAM2UA5KH4UOMQ4U","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"pith_short_8","alias_value":"UAM2UA5K","created_at":"2026-07-05T03:45:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:UAM2UA5KH4UOMQ4UMPNIGAQ4UX","target":"record","payload":{"canonical_record":{"source":{"id":"2201.01275","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2022-01-03T08:04:38Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"7260239bc5d3530428a3b17f936f98ad483de54e2132cc29f8578da9040c7418","abstract_canon_sha256":"eac3c274460725f0a224cab0a9acc31c9502f82de82f9c1d43a2c78d631b0567"},"schema_version":"1.0"},"canonical_sha256":"a019aa03aa3f28e6439463da83021ca5f61fc852871fa0ea4100aaacdd8e99d8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:45:59.327743Z","signature_b64":"hYjFMiKIPJhwq4s54VY9EgfCWlgf8vbKIGQNVMheTVljQY8ncHFyBNW447QTHJ6GzvUkmRf11yPioR3r5ZDbBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a019aa03aa3f28e6439463da83021ca5f61fc852871fa0ea4100aaacdd8e99d8","last_reissued_at":"2026-07-05T03:45:59.327272Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:45:59.327272Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2201.01275","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":"2026-07-05T03:45:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tgcSDdl8dVFzDUUzCkKyRfYwOxhPMrx8ZrigyNTFUR3+yktJJkpN8neFKYiV1SHflPTWjmNWjBpQ18z3WaGeBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T13:59:51.712686Z"},"content_sha256":"ad7d092d9c2fa5be179aa836ce7ccf8c779a51c39f212e74f769e8c990872282","schema_version":"1.0","event_id":"sha256:ad7d092d9c2fa5be179aa836ce7ccf8c779a51c39f212e74f769e8c990872282"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:UAM2UA5KH4UOMQ4UMPNIGAQ4UX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Local Quadruple Pattern: A Novel Descriptor for Facial Image Recognition and Retrieval","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["cs.MM"],"primary_cat":"cs.CV","authors_text":"Pavan Chakraborty, Satish Kumar Singh, Soumendu Chakraborty","submitted_at":"2022-01-03T08:04:38Z","abstract_excerpt":"In this paper a novel hand crafted local quadruple pattern (LQPAT) is proposed for facial image recognition and retrieval. Most of the existing hand-crafted descriptors encodes only a limited number of pixels in the local neighbourhood. Under unconstrained environment the performance of these descriptors tends to degrade drastically. The major problem in increasing the local neighbourhood is that, it also increases the feature length of the descriptor. The proposed descriptor try to overcome these problems by defining an efficient encoding structure with optimal feature length. The proposed de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.01275","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2201.01275/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":"2026-07-05T03:45:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aAV4oIw/CLDAOFToyaIMtfQHHcIhp6L3rwszEPJwUSIdiG5zlkHECVKbq4z41+24eUvuAiQu3Ngd81BReFh6DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T13:59:51.713701Z"},"content_sha256":"dba5f26b14752238a1f73f4be438674a121ba9ec4cc731a0aa109288db3fecc7","schema_version":"1.0","event_id":"sha256:dba5f26b14752238a1f73f4be438674a121ba9ec4cc731a0aa109288db3fecc7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UAM2UA5KH4UOMQ4UMPNIGAQ4UX/bundle.json","state_url":"https://pith.science/pith/UAM2UA5KH4UOMQ4UMPNIGAQ4UX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UAM2UA5KH4UOMQ4UMPNIGAQ4UX/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":"2026-08-18T13:59:51Z","links":{"resolver":"https://pith.science/pith/UAM2UA5KH4UOMQ4UMPNIGAQ4UX","bundle":"https://pith.science/pith/UAM2UA5KH4UOMQ4UMPNIGAQ4UX/bundle.json","state":"https://pith.science/pith/UAM2UA5KH4UOMQ4UMPNIGAQ4UX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UAM2UA5KH4UOMQ4UMPNIGAQ4UX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:UAM2UA5KH4UOMQ4UMPNIGAQ4UX","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":"eac3c274460725f0a224cab0a9acc31c9502f82de82f9c1d43a2c78d631b0567","cross_cats_sorted":["cs.MM"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2022-01-03T08:04:38Z","title_canon_sha256":"7260239bc5d3530428a3b17f936f98ad483de54e2132cc29f8578da9040c7418"},"schema_version":"1.0","source":{"id":"2201.01275","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2201.01275","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"arxiv_version","alias_value":"2201.01275v1","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2201.01275","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"pith_short_12","alias_value":"UAM2UA5KH4UO","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"pith_short_16","alias_value":"UAM2UA5KH4UOMQ4U","created_at":"2026-07-05T03:45:59Z"},{"alias_kind":"pith_short_8","alias_value":"UAM2UA5K","created_at":"2026-07-05T03:45:59Z"}],"graph_snapshots":[{"event_id":"sha256:dba5f26b14752238a1f73f4be438674a121ba9ec4cc731a0aa109288db3fecc7","target":"graph","created_at":"2026-07-05T03:45:59Z","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/2201.01275/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper a novel hand crafted local quadruple pattern (LQPAT) is proposed for facial image recognition and retrieval. Most of the existing hand-crafted descriptors encodes only a limited number of pixels in the local neighbourhood. Under unconstrained environment the performance of these descriptors tends to degrade drastically. The major problem in increasing the local neighbourhood is that, it also increases the feature length of the descriptor. The proposed descriptor try to overcome these problems by defining an efficient encoding structure with optimal feature length. The proposed de","authors_text":"Pavan Chakraborty, Satish Kumar Singh, Soumendu Chakraborty","cross_cats":["cs.MM"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2022-01-03T08:04:38Z","title":"Local Quadruple Pattern: A Novel Descriptor for Facial Image Recognition and Retrieval"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.01275","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:ad7d092d9c2fa5be179aa836ce7ccf8c779a51c39f212e74f769e8c990872282","target":"record","created_at":"2026-07-05T03:45:59Z","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":"eac3c274460725f0a224cab0a9acc31c9502f82de82f9c1d43a2c78d631b0567","cross_cats_sorted":["cs.MM"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2022-01-03T08:04:38Z","title_canon_sha256":"7260239bc5d3530428a3b17f936f98ad483de54e2132cc29f8578da9040c7418"},"schema_version":"1.0","source":{"id":"2201.01275","kind":"arxiv","version":1}},"canonical_sha256":"a019aa03aa3f28e6439463da83021ca5f61fc852871fa0ea4100aaacdd8e99d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a019aa03aa3f28e6439463da83021ca5f61fc852871fa0ea4100aaacdd8e99d8","first_computed_at":"2026-07-05T03:45:59.327272Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:45:59.327272Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hYjFMiKIPJhwq4s54VY9EgfCWlgf8vbKIGQNVMheTVljQY8ncHFyBNW447QTHJ6GzvUkmRf11yPioR3r5ZDbBw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:45:59.327743Z","signed_message":"canonical_sha256_bytes"},"source_id":"2201.01275","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ad7d092d9c2fa5be179aa836ce7ccf8c779a51c39f212e74f769e8c990872282","sha256:dba5f26b14752238a1f73f4be438674a121ba9ec4cc731a0aa109288db3fecc7"],"state_sha256":"837f5567e405799a2236cb35a4c563c4d039dfc0c6773350e55de1daa66392b9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Zzn9io0vKSb/pqBn5d5Hwi5cn2Hrq58JDJbu3WGxMW4oNxgPFbkER1VKYfzkBB/bGpV1C3xcUBSvJk74viwtAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T13:59:51.721492Z","bundle_sha256":"51bd7fba2692f2f5f12e31ccc566483ccb9285153183acfb96d15642b5402085"}}