{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:PL2AAPMVY73XJK7HNYNBHOFOSC","short_pith_number":"pith:PL2AAPMV","canonical_record":{"source":{"id":"1603.09364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-03-30T20:15:08Z","cross_cats_sorted":[],"title_canon_sha256":"de55a9ea75e5c6090626a865ff3c671fe96cc0630a9ec219dbf7589795848607","abstract_canon_sha256":"2f0de3ef679d7c7df3932768ffe4616cd8a7a4c6f20c2234c396ce7bea2bcd24"},"schema_version":"1.0"},"canonical_sha256":"7af4003d95c7f774abe76e1a13b8ae9097ac5e45eab3d26f447ed31ef5775a08","source":{"kind":"arxiv","id":"1603.09364","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.09364","created_at":"2026-05-18T00:46:53Z"},{"alias_kind":"arxiv_version","alias_value":"1603.09364v1","created_at":"2026-05-18T00:46:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.09364","created_at":"2026-05-18T00:46:53Z"},{"alias_kind":"pith_short_12","alias_value":"PL2AAPMVY73X","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"PL2AAPMVY73XJK7H","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"PL2AAPMV","created_at":"2026-05-18T12:30:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:PL2AAPMVY73XJK7HNYNBHOFOSC","target":"record","payload":{"canonical_record":{"source":{"id":"1603.09364","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-03-30T20:15:08Z","cross_cats_sorted":[],"title_canon_sha256":"de55a9ea75e5c6090626a865ff3c671fe96cc0630a9ec219dbf7589795848607","abstract_canon_sha256":"2f0de3ef679d7c7df3932768ffe4616cd8a7a4c6f20c2234c396ce7bea2bcd24"},"schema_version":"1.0"},"canonical_sha256":"7af4003d95c7f774abe76e1a13b8ae9097ac5e45eab3d26f447ed31ef5775a08","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:46:53.695721Z","signature_b64":"HjnJMPQra4g4jcfVsUAdZGl5joef/voOTvrvV/xFxjJIaItuMCrNZ97S0quLyvRrhlEeH++7gtYTgCx3Cv/mDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7af4003d95c7f774abe76e1a13b8ae9097ac5e45eab3d26f447ed31ef5775a08","last_reissued_at":"2026-05-18T00:46:53.695197Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:46:53.695197Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.09364","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":"2026-05-18T00:46:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hbTVuarpmt7sEvpU3EFqWAIbbhEVZY1HDX3yQfXH2h5PJwZ9jJ+BT+8lF7aaaCtKkJb58SoSd4yTzSeXjsTsCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T16:15:01.981712Z"},"content_sha256":"a479fca324e19f341c102c0f5880109f5a868544df5e050f532ab1dce5559c9b","schema_version":"1.0","event_id":"sha256:a479fca324e19f341c102c0f5880109f5a868544df5e050f532ab1dce5559c9b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:PL2AAPMVY73XJK7HNYNBHOFOSC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Partial Face Detection for Continuous Authentication","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Brandon Barbello, Deepak Chandra, Rama Chellappa, Upal Mahbub, Vishal M. Patel","submitted_at":"2016-03-30T20:15:08Z","abstract_excerpt":"In this paper, a part-based technique for real time detection of users' faces on mobile devices is proposed. This method is specifically designed for detecting partially cropped and occluded faces captured using a smartphone's front-facing camera for continuous authentication. The key idea is to detect facial segments in the frame and cluster the results to obtain the region which is most likely to contain a face. Extensive experimentation on a mobile dataset of 50 users shows that our method performs better than many state-of-the-art face detection methods in terms of accuracy and processing "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.09364","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":"2026-05-18T00:46:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3CJNoV8W8vcVKwuvNz47R6zCDGd2kuxP9SZigGFyyJroL4uSxfhLgx+rQYrEfZFNXKSfc1K77an5kExlRhPICg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T16:15:01.982059Z"},"content_sha256":"fbcddf3e99b068f13275572817ad093af1fa70b0107fdc9d5c4ee904b53acd7e","schema_version":"1.0","event_id":"sha256:fbcddf3e99b068f13275572817ad093af1fa70b0107fdc9d5c4ee904b53acd7e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PL2AAPMVY73XJK7HNYNBHOFOSC/bundle.json","state_url":"https://pith.science/pith/PL2AAPMVY73XJK7HNYNBHOFOSC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PL2AAPMVY73XJK7HNYNBHOFOSC/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":"2026-06-02T16:15:01Z","links":{"resolver":"https://pith.science/pith/PL2AAPMVY73XJK7HNYNBHOFOSC","bundle":"https://pith.science/pith/PL2AAPMVY73XJK7HNYNBHOFOSC/bundle.json","state":"https://pith.science/pith/PL2AAPMVY73XJK7HNYNBHOFOSC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PL2AAPMVY73XJK7HNYNBHOFOSC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:PL2AAPMVY73XJK7HNYNBHOFOSC","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":"2f0de3ef679d7c7df3932768ffe4616cd8a7a4c6f20c2234c396ce7bea2bcd24","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-03-30T20:15:08Z","title_canon_sha256":"de55a9ea75e5c6090626a865ff3c671fe96cc0630a9ec219dbf7589795848607"},"schema_version":"1.0","source":{"id":"1603.09364","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.09364","created_at":"2026-05-18T00:46:53Z"},{"alias_kind":"arxiv_version","alias_value":"1603.09364v1","created_at":"2026-05-18T00:46:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.09364","created_at":"2026-05-18T00:46:53Z"},{"alias_kind":"pith_short_12","alias_value":"PL2AAPMVY73X","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_16","alias_value":"PL2AAPMVY73XJK7H","created_at":"2026-05-18T12:30:39Z"},{"alias_kind":"pith_short_8","alias_value":"PL2AAPMV","created_at":"2026-05-18T12:30:39Z"}],"graph_snapshots":[{"event_id":"sha256:fbcddf3e99b068f13275572817ad093af1fa70b0107fdc9d5c4ee904b53acd7e","target":"graph","created_at":"2026-05-18T00:46:53Z","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":"In this paper, a part-based technique for real time detection of users' faces on mobile devices is proposed. This method is specifically designed for detecting partially cropped and occluded faces captured using a smartphone's front-facing camera for continuous authentication. The key idea is to detect facial segments in the frame and cluster the results to obtain the region which is most likely to contain a face. Extensive experimentation on a mobile dataset of 50 users shows that our method performs better than many state-of-the-art face detection methods in terms of accuracy and processing ","authors_text":"Brandon Barbello, Deepak Chandra, Rama Chellappa, Upal Mahbub, Vishal M. Patel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-03-30T20:15:08Z","title":"Partial Face Detection for Continuous Authentication"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.09364","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:a479fca324e19f341c102c0f5880109f5a868544df5e050f532ab1dce5559c9b","target":"record","created_at":"2026-05-18T00:46:53Z","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":"2f0de3ef679d7c7df3932768ffe4616cd8a7a4c6f20c2234c396ce7bea2bcd24","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-03-30T20:15:08Z","title_canon_sha256":"de55a9ea75e5c6090626a865ff3c671fe96cc0630a9ec219dbf7589795848607"},"schema_version":"1.0","source":{"id":"1603.09364","kind":"arxiv","version":1}},"canonical_sha256":"7af4003d95c7f774abe76e1a13b8ae9097ac5e45eab3d26f447ed31ef5775a08","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7af4003d95c7f774abe76e1a13b8ae9097ac5e45eab3d26f447ed31ef5775a08","first_computed_at":"2026-05-18T00:46:53.695197Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:46:53.695197Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HjnJMPQra4g4jcfVsUAdZGl5joef/voOTvrvV/xFxjJIaItuMCrNZ97S0quLyvRrhlEeH++7gtYTgCx3Cv/mDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:46:53.695721Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.09364","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a479fca324e19f341c102c0f5880109f5a868544df5e050f532ab1dce5559c9b","sha256:fbcddf3e99b068f13275572817ad093af1fa70b0107fdc9d5c4ee904b53acd7e"],"state_sha256":"076a2ff3318b00afc1a4a82e1e9bf1871db856969eab56362bae4c551e8db7fc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FZd6Drbm59456wySRD0NyiIRE2YN9eXAbr1dsFnaExuao438GSHox1tQO36BSM7R4/WGfJyPaJ8nihb9EoFdAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T16:15:01.984098Z","bundle_sha256":"972764a51a36d7803f43f2a678793ca06892b5e8ed613c3757082798df1b2dd0"}}