{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:AKRTH3SVKLI7P5QT55NJKFIZ2Y","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":"ddf11f69a5b554736d433f1fe991b48449902019a152bfb180253b516d3c9c26","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-11-10T03:45:02Z","title_canon_sha256":"0073c2c979a6f250fa9144703f7fd8ccf7405066a2c2b67852e580993e14552d"},"schema_version":"1.0","source":{"id":"1511.02986","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.02986","created_at":"2026-05-18T01:24:06Z"},{"alias_kind":"arxiv_version","alias_value":"1511.02986v2","created_at":"2026-05-18T01:24:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.02986","created_at":"2026-05-18T01:24:06Z"},{"alias_kind":"pith_short_12","alias_value":"AKRTH3SVKLI7","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"AKRTH3SVKLI7P5QT","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"AKRTH3SV","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:491d51dbfe262adac54c349fd3b486abcc0e7a4ce0196482c79c1220bc7573f4","target":"graph","created_at":"2026-05-18T01:24:06Z","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":"Fourier ptychography is a new computational microscopy technique that provides gigapixel-scale intensity and phase images with both wide field-of-view and high resolution. By capturing a stack of low-resolution images under different illumination angles, a nonlinear inverse algorithm can be used to computationally reconstruct the high-resolution complex field. Here, we compare and classify multiple proposed inverse algorithms in terms of experimental robustness. We find that the main sources of error are noise, aberrations and mis-calibration (i.e. model mis-match). Using simulations and exper","authors_text":"Gongguo Tang, Jingshan Zhong, Jonathan Dong, Laura Waller, Lei Tian, Li-Hao Yeh, Mahdi Soltanolkotabi, Michael Chen","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-11-10T03:45:02Z","title":"Experimental robustness of Fourier Ptychography phase retrieval algorithms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.02986","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:feb7054159718e4e4b7aaa4182d853b39c964921567f5b81b4fab6bf467acea2","target":"record","created_at":"2026-05-18T01:24:06Z","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":"ddf11f69a5b554736d433f1fe991b48449902019a152bfb180253b516d3c9c26","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-11-10T03:45:02Z","title_canon_sha256":"0073c2c979a6f250fa9144703f7fd8ccf7405066a2c2b67852e580993e14552d"},"schema_version":"1.0","source":{"id":"1511.02986","kind":"arxiv","version":2}},"canonical_sha256":"02a333ee5552d1f7f613ef5a951519d635a3972c1d23d73af00dccca17bd9611","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02a333ee5552d1f7f613ef5a951519d635a3972c1d23d73af00dccca17bd9611","first_computed_at":"2026-05-18T01:24:06.364730Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:06.364730Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UNKaVp9F5qt2fKb/2zxDx+WO3KwIqUXdz4+J2NCGJy3HOaeVDCUkVu1LnlusJA6SpAfiaC1uHbXzo6+j1AtlDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:06.365504Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.02986","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:feb7054159718e4e4b7aaa4182d853b39c964921567f5b81b4fab6bf467acea2","sha256:491d51dbfe262adac54c349fd3b486abcc0e7a4ce0196482c79c1220bc7573f4"],"state_sha256":"0823ce62e9a97d97ab4e6afbb2a0a31d17977c9b8f80ce1804af6e314893bad2"}