{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:CVZQYTQZVBZYNZRGABM5WHTMF7","short_pith_number":"pith:CVZQYTQZ","canonical_record":{"source":{"id":"1901.03057","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-01-10T08:44:50Z","cross_cats_sorted":["eess.IV"],"title_canon_sha256":"9dd6049ed72781239a784cedd154457042ccff63c600304757149337606384ef","abstract_canon_sha256":"4cc6118afa2ae5da640fe0e12c985c4b493cb6c9b85ae60d430c5d3e94fcb1dc"},"schema_version":"1.0"},"canonical_sha256":"15730c4e19a87386e6260059db1e6c2fd9bc1507e7f26798f61167ed1abd2842","source":{"kind":"arxiv","id":"1901.03057","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.03057","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1901.03057v2","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03057","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"CVZQYTQZVBZY","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"CVZQYTQZVBZYNZRG","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"CVZQYTQZ","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:CVZQYTQZVBZYNZRGABM5WHTMF7","target":"record","payload":{"canonical_record":{"source":{"id":"1901.03057","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-01-10T08:44:50Z","cross_cats_sorted":["eess.IV"],"title_canon_sha256":"9dd6049ed72781239a784cedd154457042ccff63c600304757149337606384ef","abstract_canon_sha256":"4cc6118afa2ae5da640fe0e12c985c4b493cb6c9b85ae60d430c5d3e94fcb1dc"},"schema_version":"1.0"},"canonical_sha256":"15730c4e19a87386e6260059db1e6c2fd9bc1507e7f26798f61167ed1abd2842","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:21.927098Z","signature_b64":"d7RElM1v+/o3pTcD1PSPKig4+p9/x6gqdxEzeJqrHdT+2Xx5pdXSttoIJrQZP/lzVM+7o3SrDHBM/odjSrcZBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"15730c4e19a87386e6260059db1e6c2fd9bc1507e7f26798f61167ed1abd2842","last_reissued_at":"2026-05-17T23:50:21.926582Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:21.926582Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.03057","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CHtDYfZLgVtbg2VSf4ZrqM5JtHItuvugBZJ3gSfI7O8FouiWYDt7DCPZSK7WSbu3mXBUow6WhvoPQiXjqwXUBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T14:28:23.533783Z"},"content_sha256":"faaff9c571e004c7eb78f3d4ee5d393be8f29a98bdc74e6a5eef7f2ec115d02e","schema_version":"1.0","event_id":"sha256:faaff9c571e004c7eb78f3d4ee5d393be8f29a98bdc74e6a5eef7f2ec115d02e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:CVZQYTQZVBZYNZRGABM5WHTMF7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-field Fourier ptychography: super-resolution phase retrieval via speckle illumination","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.IV"],"primary_cat":"physics.optics","authors_text":"Guoan Zheng, He Zhang, Jian Liu, Junjing Deng, Jun Liao, Shaowei Jiang, Yongbing Zhang","submitted_at":"2019-01-10T08:44:50Z","abstract_excerpt":"Achieving high spatial resolution is the goal of many imaging systems. Designing a high-resolution lens with diffraction-limited performance over a large field of view remains a difficult task in imaging system design. On the other hand, creating a complex speckle pattern with wavelength-limited spatial features is effortless and can be implemented via a simple random diffuser. With this observation and inspired by the concept of near-field ptychography, we report a new imaging modality, termed near-field Fourier ptychography, for tackling high-resolution imaging challenges in both microscopic"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03057","kind":"arxiv","version":2},"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":"2026-05-17T23:50:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HkQXPneuARrbsIEowHhN01Q2G03G4TL9NfgI03zySUSb+Z5m3U4/iWdXBWFmXUUSJy3ED3cBgV7UCeZn5KpLCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T14:28:23.534125Z"},"content_sha256":"49ea0b0b90cf90d4608cbde1239d2af4d2340d594b6c52ef3582a57e5b8efb9f","schema_version":"1.0","event_id":"sha256:49ea0b0b90cf90d4608cbde1239d2af4d2340d594b6c52ef3582a57e5b8efb9f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CVZQYTQZVBZYNZRGABM5WHTMF7/bundle.json","state_url":"https://pith.science/pith/CVZQYTQZVBZYNZRGABM5WHTMF7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CVZQYTQZVBZYNZRGABM5WHTMF7/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":"2026-06-01T14:28:23Z","links":{"resolver":"https://pith.science/pith/CVZQYTQZVBZYNZRGABM5WHTMF7","bundle":"https://pith.science/pith/CVZQYTQZVBZYNZRGABM5WHTMF7/bundle.json","state":"https://pith.science/pith/CVZQYTQZVBZYNZRGABM5WHTMF7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CVZQYTQZVBZYNZRGABM5WHTMF7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:CVZQYTQZVBZYNZRGABM5WHTMF7","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":"4cc6118afa2ae5da640fe0e12c985c4b493cb6c9b85ae60d430c5d3e94fcb1dc","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-01-10T08:44:50Z","title_canon_sha256":"9dd6049ed72781239a784cedd154457042ccff63c600304757149337606384ef"},"schema_version":"1.0","source":{"id":"1901.03057","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.03057","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"arxiv_version","alias_value":"1901.03057v2","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03057","created_at":"2026-05-17T23:50:21Z"},{"alias_kind":"pith_short_12","alias_value":"CVZQYTQZVBZY","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"CVZQYTQZVBZYNZRG","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"CVZQYTQZ","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:49ea0b0b90cf90d4608cbde1239d2af4d2340d594b6c52ef3582a57e5b8efb9f","target":"graph","created_at":"2026-05-17T23:50:21Z","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":"Achieving high spatial resolution is the goal of many imaging systems. Designing a high-resolution lens with diffraction-limited performance over a large field of view remains a difficult task in imaging system design. On the other hand, creating a complex speckle pattern with wavelength-limited spatial features is effortless and can be implemented via a simple random diffuser. With this observation and inspired by the concept of near-field ptychography, we report a new imaging modality, termed near-field Fourier ptychography, for tackling high-resolution imaging challenges in both microscopic","authors_text":"Guoan Zheng, He Zhang, Jian Liu, Junjing Deng, Jun Liao, Shaowei Jiang, Yongbing Zhang","cross_cats":["eess.IV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-01-10T08:44:50Z","title":"Near-field Fourier ptychography: super-resolution phase retrieval via speckle illumination"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03057","kind":"arxiv","version":2},"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:faaff9c571e004c7eb78f3d4ee5d393be8f29a98bdc74e6a5eef7f2ec115d02e","target":"record","created_at":"2026-05-17T23:50:21Z","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":"4cc6118afa2ae5da640fe0e12c985c4b493cb6c9b85ae60d430c5d3e94fcb1dc","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2019-01-10T08:44:50Z","title_canon_sha256":"9dd6049ed72781239a784cedd154457042ccff63c600304757149337606384ef"},"schema_version":"1.0","source":{"id":"1901.03057","kind":"arxiv","version":2}},"canonical_sha256":"15730c4e19a87386e6260059db1e6c2fd9bc1507e7f26798f61167ed1abd2842","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"15730c4e19a87386e6260059db1e6c2fd9bc1507e7f26798f61167ed1abd2842","first_computed_at":"2026-05-17T23:50:21.926582Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:21.926582Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d7RElM1v+/o3pTcD1PSPKig4+p9/x6gqdxEzeJqrHdT+2Xx5pdXSttoIJrQZP/lzVM+7o3SrDHBM/odjSrcZBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:21.927098Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.03057","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:faaff9c571e004c7eb78f3d4ee5d393be8f29a98bdc74e6a5eef7f2ec115d02e","sha256:49ea0b0b90cf90d4608cbde1239d2af4d2340d594b6c52ef3582a57e5b8efb9f"],"state_sha256":"9f1046321205000a5e9b69258b108cbece64067875331db5ec4fdcf62a62b7e7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0yHIL8W4nmlaOvMcKxooTv3kPcrq3jtSBBHj0vywp5ycq+yIa6x8MBrWfsRp1uPw2AU/cllsej5npPI8x/9EDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T14:28:23.536068Z","bundle_sha256":"bd17409edef74cda4e50854ef0d8fe136bf34778ae2736940ce21f97341e871e"}}