{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:HCN5MQJIDS33GS4V43QW6HXSGS","short_pith_number":"pith:HCN5MQJI","canonical_record":{"source":{"id":"1711.03990","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-11-10T19:19:55Z","cross_cats_sorted":[],"title_canon_sha256":"c1c49f0a15bb5c11aa35e1935394160934a4db1b71876f0a69fb757ef9204ede","abstract_canon_sha256":"5e522a10d54f1aadcf5521bef76d3c77becbe256da401aa2d6abdc7a2048ba9c"},"schema_version":"1.0"},"canonical_sha256":"389bd641281cb7b34b95e6e16f1ef234ad4e3bd38c73e5a69bd8181978587235","source":{"kind":"arxiv","id":"1711.03990","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.03990","created_at":"2026-05-18T00:30:50Z"},{"alias_kind":"arxiv_version","alias_value":"1711.03990v1","created_at":"2026-05-18T00:30:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.03990","created_at":"2026-05-18T00:30:50Z"},{"alias_kind":"pith_short_12","alias_value":"HCN5MQJIDS33","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_16","alias_value":"HCN5MQJIDS33GS4V","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_8","alias_value":"HCN5MQJI","created_at":"2026-05-18T12:31:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:HCN5MQJIDS33GS4V43QW6HXSGS","target":"record","payload":{"canonical_record":{"source":{"id":"1711.03990","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-11-10T19:19:55Z","cross_cats_sorted":[],"title_canon_sha256":"c1c49f0a15bb5c11aa35e1935394160934a4db1b71876f0a69fb757ef9204ede","abstract_canon_sha256":"5e522a10d54f1aadcf5521bef76d3c77becbe256da401aa2d6abdc7a2048ba9c"},"schema_version":"1.0"},"canonical_sha256":"389bd641281cb7b34b95e6e16f1ef234ad4e3bd38c73e5a69bd8181978587235","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:50.370270Z","signature_b64":"jktLaJjx5uSU7bhOKBODoqCiyE15F/W/QhGn1UewbVNWTfaW4IbXARntDl8tx1wV+JBPJif/41P3but872BxBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"389bd641281cb7b34b95e6e16f1ef234ad4e3bd38c73e5a69bd8181978587235","last_reissued_at":"2026-05-18T00:30:50.369635Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:50.369635Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1711.03990","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":"2026-05-18T00:30:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zgL931RydndnpuZDRJ7BJXipT77Ghi/BrQXikS4K4ha5Lu7OUH9qFWAuqomNsFFGhv4brhm4YlMk45AtIfFwDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T17:56:01.848933Z"},"content_sha256":"b111d42890929cc8c951651e57269666f5ff8e7c87be2490387358fbac0d555a","schema_version":"1.0","event_id":"sha256:b111d42890929cc8c951651e57269666f5ff8e7c87be2490387358fbac0d555a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:HCN5MQJIDS33GS4V43QW6HXSGS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Longitudinal Study of Child Face Recognition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Anil K. Jain, Debayan Deb, Neeta Nain","submitted_at":"2017-11-10T19:19:55Z","abstract_excerpt":"We present a longitudinal study of face recognition performance on Children Longitudinal Face (CLF) dataset containing 3,682 face images of 919 subjects, in the age group [2, 18] years. Each subject has at least four face images acquired over a time span of up to six years. Face comparison scores are obtained from (i) a state-of-the-art COTS matcher (COTS-A), (ii) an open-source matcher (FaceNet), and (iii) a simple sum fusion of scores obtained from COTS-A and FaceNet matchers. To improve the performance of the open-source FaceNet matcher for child face recognition, we were able to fine-tune "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.03990","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":"2026-05-18T00:30:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+9sHhut+CypR6uAH0OxII5eqfNWrEjrjNwkEdaREtIbdVbvq4tJW1w4TDnmf1T993jfMs9t5O7Ky54W1Ch6mAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T17:56:01.849649Z"},"content_sha256":"d5fdb9803ef25cac687eac0bbf12a6a0da0d918e591b5d5087f6c0ccba5817f5","schema_version":"1.0","event_id":"sha256:d5fdb9803ef25cac687eac0bbf12a6a0da0d918e591b5d5087f6c0ccba5817f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HCN5MQJIDS33GS4V43QW6HXSGS/bundle.json","state_url":"https://pith.science/pith/HCN5MQJIDS33GS4V43QW6HXSGS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HCN5MQJIDS33GS4V43QW6HXSGS/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":"2026-05-23T17:56:01Z","links":{"resolver":"https://pith.science/pith/HCN5MQJIDS33GS4V43QW6HXSGS","bundle":"https://pith.science/pith/HCN5MQJIDS33GS4V43QW6HXSGS/bundle.json","state":"https://pith.science/pith/HCN5MQJIDS33GS4V43QW6HXSGS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HCN5MQJIDS33GS4V43QW6HXSGS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:HCN5MQJIDS33GS4V43QW6HXSGS","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":"5e522a10d54f1aadcf5521bef76d3c77becbe256da401aa2d6abdc7a2048ba9c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-11-10T19:19:55Z","title_canon_sha256":"c1c49f0a15bb5c11aa35e1935394160934a4db1b71876f0a69fb757ef9204ede"},"schema_version":"1.0","source":{"id":"1711.03990","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.03990","created_at":"2026-05-18T00:30:50Z"},{"alias_kind":"arxiv_version","alias_value":"1711.03990v1","created_at":"2026-05-18T00:30:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.03990","created_at":"2026-05-18T00:30:50Z"},{"alias_kind":"pith_short_12","alias_value":"HCN5MQJIDS33","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_16","alias_value":"HCN5MQJIDS33GS4V","created_at":"2026-05-18T12:31:18Z"},{"alias_kind":"pith_short_8","alias_value":"HCN5MQJI","created_at":"2026-05-18T12:31:18Z"}],"graph_snapshots":[{"event_id":"sha256:d5fdb9803ef25cac687eac0bbf12a6a0da0d918e591b5d5087f6c0ccba5817f5","target":"graph","created_at":"2026-05-18T00:30:50Z","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":"We present a longitudinal study of face recognition performance on Children Longitudinal Face (CLF) dataset containing 3,682 face images of 919 subjects, in the age group [2, 18] years. Each subject has at least four face images acquired over a time span of up to six years. Face comparison scores are obtained from (i) a state-of-the-art COTS matcher (COTS-A), (ii) an open-source matcher (FaceNet), and (iii) a simple sum fusion of scores obtained from COTS-A and FaceNet matchers. To improve the performance of the open-source FaceNet matcher for child face recognition, we were able to fine-tune ","authors_text":"Anil K. Jain, Debayan Deb, Neeta Nain","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-11-10T19:19:55Z","title":"Longitudinal Study of Child Face Recognition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.03990","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:b111d42890929cc8c951651e57269666f5ff8e7c87be2490387358fbac0d555a","target":"record","created_at":"2026-05-18T00:30:50Z","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":"5e522a10d54f1aadcf5521bef76d3c77becbe256da401aa2d6abdc7a2048ba9c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-11-10T19:19:55Z","title_canon_sha256":"c1c49f0a15bb5c11aa35e1935394160934a4db1b71876f0a69fb757ef9204ede"},"schema_version":"1.0","source":{"id":"1711.03990","kind":"arxiv","version":1}},"canonical_sha256":"389bd641281cb7b34b95e6e16f1ef234ad4e3bd38c73e5a69bd8181978587235","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"389bd641281cb7b34b95e6e16f1ef234ad4e3bd38c73e5a69bd8181978587235","first_computed_at":"2026-05-18T00:30:50.369635Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:30:50.369635Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jktLaJjx5uSU7bhOKBODoqCiyE15F/W/QhGn1UewbVNWTfaW4IbXARntDl8tx1wV+JBPJif/41P3but872BxBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:30:50.370270Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.03990","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b111d42890929cc8c951651e57269666f5ff8e7c87be2490387358fbac0d555a","sha256:d5fdb9803ef25cac687eac0bbf12a6a0da0d918e591b5d5087f6c0ccba5817f5"],"state_sha256":"04c994ac74018b77772bc21a56aaa0c25c6d9922a10cf67542c8790a76beb62b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UX42OL1ZagWf9sHHiiogYnQ1MQRHm+YIzAul8x/Vb/qMqtI+PeENqDKKFh7+MX5ud3zuen0B6Ohu1jTMRjnBAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T17:56:01.853248Z","bundle_sha256":"b7b8e2de83993be39cca19e480c98061f49fb133e18321ae6b2983125c47823f"}}