{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:W24WJXW2RN53QWOEJTBQEMO772","short_pith_number":"pith:W24WJXW2","canonical_record":{"source":{"id":"1906.06231","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-06-14T14:47:27Z","cross_cats_sorted":["eess.IV"],"title_canon_sha256":"3b36878db2f4e485e984acc26759adc9c4f772f5f837c74c685c82468b0472a2","abstract_canon_sha256":"5c1a5481682b57556364aab96a8322c84330c60b975424c11590dc2d261a74a5"},"schema_version":"1.0"},"canonical_sha256":"b6b964deda8b7bb859c44cc30231dffe8034c6013c11a2ad7036e3a1d70bcf76","source":{"kind":"arxiv","id":"1906.06231","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.06231","created_at":"2026-05-17T23:43:19Z"},{"alias_kind":"arxiv_version","alias_value":"1906.06231v1","created_at":"2026-05-17T23:43:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.06231","created_at":"2026-05-17T23:43:19Z"},{"alias_kind":"pith_short_12","alias_value":"W24WJXW2RN53","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"W24WJXW2RN53QWOE","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"W24WJXW2","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:W24WJXW2RN53QWOEJTBQEMO772","target":"record","payload":{"canonical_record":{"source":{"id":"1906.06231","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-06-14T14:47:27Z","cross_cats_sorted":["eess.IV"],"title_canon_sha256":"3b36878db2f4e485e984acc26759adc9c4f772f5f837c74c685c82468b0472a2","abstract_canon_sha256":"5c1a5481682b57556364aab96a8322c84330c60b975424c11590dc2d261a74a5"},"schema_version":"1.0"},"canonical_sha256":"b6b964deda8b7bb859c44cc30231dffe8034c6013c11a2ad7036e3a1d70bcf76","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:19.273165Z","signature_b64":"3hDRCUfKPZeQo3a7c96h/VLr/i4YqGw8R1f1QS0yOrWWe7HRkP+hhByjnlm1cJCNgPUybb5YveJ+2IPguGsYAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b6b964deda8b7bb859c44cc30231dffe8034c6013c11a2ad7036e3a1d70bcf76","last_reissued_at":"2026-05-17T23:43:19.272503Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:19.272503Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.06231","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":"2026-05-17T23:43:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ytuu/QiTgk1ly+vzepZOp5NFQy4yFBvoc2JKFhpA80l6E7BycOvEhjl48Q02bfxwQ9vYMZUloPGsMw4MgqYUBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T09:53:51.740306Z"},"content_sha256":"5c5280fe98707d7fc2ee5a6a329a553caaed91d09e01843704c0f605c5612053","schema_version":"1.0","event_id":"sha256:5c5280fe98707d7fc2ee5a6a329a553caaed91d09e01843704c0f605c5612053"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:W24WJXW2RN53QWOEJTBQEMO772","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Resolution analysis in a lens-free on-chip digital holographic microscope","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.IV"],"primary_cat":"physics.optics","authors_text":"Chao Zuo, Jialin Zhang, Jiasong Sun, Qian Chen","submitted_at":"2019-06-14T14:47:27Z","abstract_excerpt":"Lens-free on-chip digital holographic microscopy (LFOCDHM) is a modern imaging technique whereby the sample is placed directly onto or very close to the digital sensor, and illuminated by a partially coherent source located far above it. The scattered object wave interferes with the reference (unscattered) wave at the plane where a digital sensor is situated, producing a digital hologram that can be processed in several ways to extract and numerically reconstruct an in-focus image using the back propagation algorithm. Without requiring any lenses and other intermediate optical components, the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.06231","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":"2026-05-17T23:43:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cyAhgqNySno6kqLiBoKg0dD5RI9GygANxpdbqnFpHEKyix8vnQ2fxKByyy/ZZ/DtRqjlm5FkuMY6FcPy46fuBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T09:53:51.740665Z"},"content_sha256":"35ff5765c3cdeb8ac5805b06b4ee767f1802932b96c77c6e1ef53bff534fba55","schema_version":"1.0","event_id":"sha256:35ff5765c3cdeb8ac5805b06b4ee767f1802932b96c77c6e1ef53bff534fba55"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W24WJXW2RN53QWOEJTBQEMO772/bundle.json","state_url":"https://pith.science/pith/W24WJXW2RN53QWOEJTBQEMO772/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W24WJXW2RN53QWOEJTBQEMO772/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":"2026-06-05T09:53:51Z","links":{"resolver":"https://pith.science/pith/W24WJXW2RN53QWOEJTBQEMO772","bundle":"https://pith.science/pith/W24WJXW2RN53QWOEJTBQEMO772/bundle.json","state":"https://pith.science/pith/W24WJXW2RN53QWOEJTBQEMO772/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W24WJXW2RN53QWOEJTBQEMO772/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:W24WJXW2RN53QWOEJTBQEMO772","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":"5c1a5481682b57556364aab96a8322c84330c60b975424c11590dc2d261a74a5","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-06-14T14:47:27Z","title_canon_sha256":"3b36878db2f4e485e984acc26759adc9c4f772f5f837c74c685c82468b0472a2"},"schema_version":"1.0","source":{"id":"1906.06231","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.06231","created_at":"2026-05-17T23:43:19Z"},{"alias_kind":"arxiv_version","alias_value":"1906.06231v1","created_at":"2026-05-17T23:43:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.06231","created_at":"2026-05-17T23:43:19Z"},{"alias_kind":"pith_short_12","alias_value":"W24WJXW2RN53","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"W24WJXW2RN53QWOE","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"W24WJXW2","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:35ff5765c3cdeb8ac5805b06b4ee767f1802932b96c77c6e1ef53bff534fba55","target":"graph","created_at":"2026-05-17T23:43:19Z","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":"Lens-free on-chip digital holographic microscopy (LFOCDHM) is a modern imaging technique whereby the sample is placed directly onto or very close to the digital sensor, and illuminated by a partially coherent source located far above it. The scattered object wave interferes with the reference (unscattered) wave at the plane where a digital sensor is situated, producing a digital hologram that can be processed in several ways to extract and numerically reconstruct an in-focus image using the back propagation algorithm. Without requiring any lenses and other intermediate optical components, the ","authors_text":"Chao Zuo, Jialin Zhang, Jiasong Sun, Qian Chen","cross_cats":["eess.IV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-06-14T14:47:27Z","title":"Resolution analysis in a lens-free on-chip digital holographic microscope"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.06231","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":"sha256:5c5280fe98707d7fc2ee5a6a329a553caaed91d09e01843704c0f605c5612053","target":"record","created_at":"2026-05-17T23:43:19Z","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":"5c1a5481682b57556364aab96a8322c84330c60b975424c11590dc2d261a74a5","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-06-14T14:47:27Z","title_canon_sha256":"3b36878db2f4e485e984acc26759adc9c4f772f5f837c74c685c82468b0472a2"},"schema_version":"1.0","source":{"id":"1906.06231","kind":"arxiv","version":1}},"canonical_sha256":"b6b964deda8b7bb859c44cc30231dffe8034c6013c11a2ad7036e3a1d70bcf76","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b6b964deda8b7bb859c44cc30231dffe8034c6013c11a2ad7036e3a1d70bcf76","first_computed_at":"2026-05-17T23:43:19.272503Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:19.272503Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3hDRCUfKPZeQo3a7c96h/VLr/i4YqGw8R1f1QS0yOrWWe7HRkP+hhByjnlm1cJCNgPUybb5YveJ+2IPguGsYAA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:19.273165Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.06231","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c5280fe98707d7fc2ee5a6a329a553caaed91d09e01843704c0f605c5612053","sha256:35ff5765c3cdeb8ac5805b06b4ee767f1802932b96c77c6e1ef53bff534fba55"],"state_sha256":"05d607a047bb23b462aa043e5d4a79117db493416e7aa865db70abfa45eab025"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QCLHrhVQbrdOfyFeaLFDvqM/Pi1fKfucWZvqzlNFs6FZp72IMs2NxtLDhBmwWUOtW18JaHPz+hYpkoYtfDRCAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T09:53:51.742773Z","bundle_sha256":"2f5d8779180e4da2a0dfd6714793e555791809201170ac576be1006e798db71f"}}