{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:WESFGLNEA5O34DWJS4SXCESLW5","short_pith_number":"pith:WESFGLNE","schema_version":"1.0","canonical_sha256":"b124532da4075dbe0ec9972571124bb77998f4fc4dca13af7ae03f253e32f398","source":{"kind":"arxiv","id":"1808.05802","version":2},"attestation_state":"computed","paper":{"title":"Blind Ptychographic Phase Retrieval via Convergent Alternating Direction Method of Multipliers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.IV"],"primary_cat":"math.OC","authors_text":"Huibin Chang, Pable Enfedaque, Stefano Marchesini","submitted_at":"2018-08-17T09:13:44Z","abstract_excerpt":"Ptychography has risen as a reference X-ray imaging technique: it achieves resolutions of one billionth of a meter, macroscopic field of view, or the capability to retrieve chemical or magnetic contrast, among other features. A ptychographyic reconstruction is normally formulated as a blind phase retrieval problem, where both the image (sample) and the probe (illumination) have to be recovered from phaseless measured data. In this article we address a nonlinear least squares model for the blind ptychography problem with constraints on the image and the probe by maximum likelihood estimation of"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1808.05802","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.OC","submitted_at":"2018-08-17T09:13:44Z","cross_cats_sorted":["eess.IV"],"title_canon_sha256":"9927ca9e507db5716db4638fd6a7170d80bdf7a8deec0d6efadbd4d8692e66d5","abstract_canon_sha256":"c9616b908a99886034345e8cb31f6e59bb49aa0932aba4173ea31be29fc7f167"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:00.174166Z","signature_b64":"Z8zWlAbX5/1RrmVfDpuU2rpJawzBxRsTCO6H3ABJX8J4GkW7d1HY+jjkxanqCEZP0qAYP2rygO7rtt2gqvyfDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b124532da4075dbe0ec9972571124bb77998f4fc4dca13af7ae03f253e32f398","last_reissued_at":"2026-05-17T23:44:00.173608Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:00.173608Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Blind Ptychographic Phase Retrieval via Convergent Alternating Direction Method of Multipliers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.IV"],"primary_cat":"math.OC","authors_text":"Huibin Chang, Pable Enfedaque, Stefano Marchesini","submitted_at":"2018-08-17T09:13:44Z","abstract_excerpt":"Ptychography has risen as a reference X-ray imaging technique: it achieves resolutions of one billionth of a meter, macroscopic field of view, or the capability to retrieve chemical or magnetic contrast, among other features. A ptychographyic reconstruction is normally formulated as a blind phase retrieval problem, where both the image (sample) and the probe (illumination) have to be recovered from phaseless measured data. In this article we address a nonlinear least squares model for the blind ptychography problem with constraints on the image and the probe by maximum likelihood estimation of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.05802","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1808.05802","created_at":"2026-05-17T23:44:00.173691+00:00"},{"alias_kind":"arxiv_version","alias_value":"1808.05802v2","created_at":"2026-05-17T23:44:00.173691+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.05802","created_at":"2026-05-17T23:44:00.173691+00:00"},{"alias_kind":"pith_short_12","alias_value":"WESFGLNEA5O3","created_at":"2026-05-18T12:32:59.047623+00:00"},{"alias_kind":"pith_short_16","alias_value":"WESFGLNEA5O34DWJ","created_at":"2026-05-18T12:32:59.047623+00:00"},{"alias_kind":"pith_short_8","alias_value":"WESFGLNE","created_at":"2026-05-18T12:32:59.047623+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/WESFGLNEA5O34DWJS4SXCESLW5","json":"https://pith.science/pith/WESFGLNEA5O34DWJS4SXCESLW5.json","graph_json":"https://pith.science/api/pith-number/WESFGLNEA5O34DWJS4SXCESLW5/graph.json","events_json":"https://pith.science/api/pith-number/WESFGLNEA5O34DWJS4SXCESLW5/events.json","paper":"https://pith.science/paper/WESFGLNE"},"agent_actions":{"view_html":"https://pith.science/pith/WESFGLNEA5O34DWJS4SXCESLW5","download_json":"https://pith.science/pith/WESFGLNEA5O34DWJS4SXCESLW5.json","view_paper":"https://pith.science/paper/WESFGLNE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1808.05802&json=true","fetch_graph":"https://pith.science/api/pith-number/WESFGLNEA5O34DWJS4SXCESLW5/graph.json","fetch_events":"https://pith.science/api/pith-number/WESFGLNEA5O34DWJS4SXCESLW5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WESFGLNEA5O34DWJS4SXCESLW5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WESFGLNEA5O34DWJS4SXCESLW5/action/storage_attestation","attest_author":"https://pith.science/pith/WESFGLNEA5O34DWJS4SXCESLW5/action/author_attestation","sign_citation":"https://pith.science/pith/WESFGLNEA5O34DWJS4SXCESLW5/action/citation_signature","submit_replication":"https://pith.science/pith/WESFGLNEA5O34DWJS4SXCESLW5/action/replication_record"}},"created_at":"2026-05-17T23:44:00.173691+00:00","updated_at":"2026-05-17T23:44:00.173691+00:00"}