{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:2FICNQQMLJXOVGLO76Y3FNUZTB","short_pith_number":"pith:2FICNQQM","canonical_record":{"source":{"id":"2406.02640","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2024-06-04T09:16:21Z","cross_cats_sorted":["physics.med-ph","physics.optics"],"title_canon_sha256":"b40d442fc480f2b7c5d016d6c9569ceb2998acdf5bf71e68b6048877c40f486a","abstract_canon_sha256":"93bc5d4c9c058aaa664609c96e7c925a02593a07465c560d5d32e2d4e8c60e82"},"schema_version":"1.0"},"canonical_sha256":"d15026c20c5a6eea996effb1b2b699986e37dea084fb83c0f49acf6b87f87526","source":{"kind":"arxiv","id":"2406.02640","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.02640","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"arxiv_version","alias_value":"2406.02640v1","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.02640","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"pith_short_12","alias_value":"2FICNQQMLJXO","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"pith_short_16","alias_value":"2FICNQQMLJXOVGLO","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"pith_short_8","alias_value":"2FICNQQM","created_at":"2026-07-05T08:27:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:2FICNQQMLJXOVGLO76Y3FNUZTB","target":"record","payload":{"canonical_record":{"source":{"id":"2406.02640","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2024-06-04T09:16:21Z","cross_cats_sorted":["physics.med-ph","physics.optics"],"title_canon_sha256":"b40d442fc480f2b7c5d016d6c9569ceb2998acdf5bf71e68b6048877c40f486a","abstract_canon_sha256":"93bc5d4c9c058aaa664609c96e7c925a02593a07465c560d5d32e2d4e8c60e82"},"schema_version":"1.0"},"canonical_sha256":"d15026c20c5a6eea996effb1b2b699986e37dea084fb83c0f49acf6b87f87526","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:27:28.360078Z","signature_b64":"T4YwRp2fO45CW6Un5Z7KEj4kO0Q0Yi06kh1akCov7g8aa8qSiKP+1ASxoPZLFRZG2MC8OhTGHusvHZETakhZCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d15026c20c5a6eea996effb1b2b699986e37dea084fb83c0f49acf6b87f87526","last_reissued_at":"2026-07-05T08:27:28.359526Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:27:28.359526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2406.02640","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":"2026-07-05T08:27:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FbOxxvQzRpBRrqemT8mlEt6ixhQGJ7K74KzIeD+sT9j75E4HnORKhh0gliP0vyNxnFRoLzND/6WILXTuLTU8Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T09:34:56.457392Z"},"content_sha256":"453c12eab784c4f6b16412cb295a936518e47681e266f328ad12a0097f4e5382","schema_version":"1.0","event_id":"sha256:453c12eab784c4f6b16412cb295a936518e47681e266f328ad12a0097f4e5382"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:2FICNQQMLJXOVGLO76Y3FNUZTB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ghost imaging-based Non-contact Heart Rate Detection","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.med-ph","physics.optics"],"primary_cat":"eess.IV","authors_text":"Bin Li, Huaibin Zheng, Hui Chen, Jianbin Liu, Jianming Yu, Yuchen He, Zhuo Xu","submitted_at":"2024-06-04T09:16:21Z","abstract_excerpt":"Remote heart rate measurement is an increasingly concerned research field, usually using remote photoplethysmography (rPPG) to collect heart rate information through video data collection. However, in certain specific scenarios (such as low light conditions, intense lighting, and non-line-of-sight situations), traditional imaging methods fail to capture image information effectively, that may lead to difficulty or inability in measuring heart rate. To address these limitations, this study proposes using ghost imaging as a substitute for traditional imaging in the aforementioned scenarios. The "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.02640","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/2406.02640/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":"2026-07-05T08:27:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9slol1II2q7Q+WtytsKuQKvDFhpm5qEl9nq7U1419q+b9ACBwDvQ4YBKtTOxecoGyumCTmq6hZXuqymlvGJ8AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T09:34:56.457929Z"},"content_sha256":"5f1f3f55ea84c9418eb51f1bc2b8005abb4ebe2443ed95a7202b3b1dffbaaa5f","schema_version":"1.0","event_id":"sha256:5f1f3f55ea84c9418eb51f1bc2b8005abb4ebe2443ed95a7202b3b1dffbaaa5f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2FICNQQMLJXOVGLO76Y3FNUZTB/bundle.json","state_url":"https://pith.science/pith/2FICNQQMLJXOVGLO76Y3FNUZTB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2FICNQQMLJXOVGLO76Y3FNUZTB/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":"2026-08-04T09:34:56Z","links":{"resolver":"https://pith.science/pith/2FICNQQMLJXOVGLO76Y3FNUZTB","bundle":"https://pith.science/pith/2FICNQQMLJXOVGLO76Y3FNUZTB/bundle.json","state":"https://pith.science/pith/2FICNQQMLJXOVGLO76Y3FNUZTB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2FICNQQMLJXOVGLO76Y3FNUZTB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:2FICNQQMLJXOVGLO76Y3FNUZTB","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":"93bc5d4c9c058aaa664609c96e7c925a02593a07465c560d5d32e2d4e8c60e82","cross_cats_sorted":["physics.med-ph","physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2024-06-04T09:16:21Z","title_canon_sha256":"b40d442fc480f2b7c5d016d6c9569ceb2998acdf5bf71e68b6048877c40f486a"},"schema_version":"1.0","source":{"id":"2406.02640","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2406.02640","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"arxiv_version","alias_value":"2406.02640v1","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.02640","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"pith_short_12","alias_value":"2FICNQQMLJXO","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"pith_short_16","alias_value":"2FICNQQMLJXOVGLO","created_at":"2026-07-05T08:27:28Z"},{"alias_kind":"pith_short_8","alias_value":"2FICNQQM","created_at":"2026-07-05T08:27:28Z"}],"graph_snapshots":[{"event_id":"sha256:5f1f3f55ea84c9418eb51f1bc2b8005abb4ebe2443ed95a7202b3b1dffbaaa5f","target":"graph","created_at":"2026-07-05T08:27:28Z","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/2406.02640/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Remote heart rate measurement is an increasingly concerned research field, usually using remote photoplethysmography (rPPG) to collect heart rate information through video data collection. However, in certain specific scenarios (such as low light conditions, intense lighting, and non-line-of-sight situations), traditional imaging methods fail to capture image information effectively, that may lead to difficulty or inability in measuring heart rate. To address these limitations, this study proposes using ghost imaging as a substitute for traditional imaging in the aforementioned scenarios. The ","authors_text":"Bin Li, Huaibin Zheng, Hui Chen, Jianbin Liu, Jianming Yu, Yuchen He, Zhuo Xu","cross_cats":["physics.med-ph","physics.optics"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2024-06-04T09:16:21Z","title":"Ghost imaging-based Non-contact Heart Rate Detection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.02640","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":"sha256:453c12eab784c4f6b16412cb295a936518e47681e266f328ad12a0097f4e5382","target":"record","created_at":"2026-07-05T08:27:28Z","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":"93bc5d4c9c058aaa664609c96e7c925a02593a07465c560d5d32e2d4e8c60e82","cross_cats_sorted":["physics.med-ph","physics.optics"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2024-06-04T09:16:21Z","title_canon_sha256":"b40d442fc480f2b7c5d016d6c9569ceb2998acdf5bf71e68b6048877c40f486a"},"schema_version":"1.0","source":{"id":"2406.02640","kind":"arxiv","version":1}},"canonical_sha256":"d15026c20c5a6eea996effb1b2b699986e37dea084fb83c0f49acf6b87f87526","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d15026c20c5a6eea996effb1b2b699986e37dea084fb83c0f49acf6b87f87526","first_computed_at":"2026-07-05T08:27:28.359526Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:27:28.359526Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T4YwRp2fO45CW6Un5Z7KEj4kO0Q0Yi06kh1akCov7g8aa8qSiKP+1ASxoPZLFRZG2MC8OhTGHusvHZETakhZCA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:27:28.360078Z","signed_message":"canonical_sha256_bytes"},"source_id":"2406.02640","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:453c12eab784c4f6b16412cb295a936518e47681e266f328ad12a0097f4e5382","sha256:5f1f3f55ea84c9418eb51f1bc2b8005abb4ebe2443ed95a7202b3b1dffbaaa5f"],"state_sha256":"bdcfc424048917583e622af5c691e05dbbf90beb8f0ad52949a5934f8a00403c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ebzOP1uks0rSvD1hZ/ENIZNGnKJ5a6u5j92nIKtnx8CVzM6LWQpvuYvBPtTXNmsuWFw040n5dd3VJQMDEg8zCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T09:34:56.461803Z","bundle_sha256":"0d7de467709fac639dc03e6de3ea7dcbcfbcc0b4e83959fe8af6fc56fa58ed43"}}