{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:2SSRGJNWHVSH44HJLEOUJJBHTV","short_pith_number":"pith:2SSRGJNW","canonical_record":{"source":{"id":"1207.5264","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-22T22:23:47Z","cross_cats_sorted":[],"title_canon_sha256":"7c31126b26f544b576c8e3579336c64e6043633000cb46995950472ab484eec0","abstract_canon_sha256":"ea50152ff8a47f2ff7aaa264c7d8ee259dbc140f9bcb7c76710291c6e246c8e7"},"schema_version":"1.0"},"canonical_sha256":"d4a51325b63d647e70e9591d44a4279d412b972c6a7e9f928ce84c3272acbf70","source":{"kind":"arxiv","id":"1207.5264","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.5264","created_at":"2026-05-18T03:50:24Z"},{"alias_kind":"arxiv_version","alias_value":"1207.5264v1","created_at":"2026-05-18T03:50:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.5264","created_at":"2026-05-18T03:50:24Z"},{"alias_kind":"pith_short_12","alias_value":"2SSRGJNWHVSH","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2SSRGJNWHVSH44HJ","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2SSRGJNW","created_at":"2026-05-18T12:26:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:2SSRGJNWHVSH44HJLEOUJJBHTV","target":"record","payload":{"canonical_record":{"source":{"id":"1207.5264","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-22T22:23:47Z","cross_cats_sorted":[],"title_canon_sha256":"7c31126b26f544b576c8e3579336c64e6043633000cb46995950472ab484eec0","abstract_canon_sha256":"ea50152ff8a47f2ff7aaa264c7d8ee259dbc140f9bcb7c76710291c6e246c8e7"},"schema_version":"1.0"},"canonical_sha256":"d4a51325b63d647e70e9591d44a4279d412b972c6a7e9f928ce84c3272acbf70","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:50:24.021010Z","signature_b64":"eDmZrhQie+dEcHZSlJhxeB8LtSN0JDOqdLLJYmMeMnuSfAG++IbK8gSmKPYkI9zDqyQ3kP0wfQtR9VTkuyqIBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4a51325b63d647e70e9591d44a4279d412b972c6a7e9f928ce84c3272acbf70","last_reissued_at":"2026-05-18T03:50:24.020210Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:50:24.020210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.5264","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":"2026-05-18T03:50:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kUdtIVjIQzEKON8/zccT7dI0y7Ivg5+ztpnuFuupXfytEHrNQ+rdXi7AFg5en4FfN6cj8rBENnaSL3fuQR6kBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T15:38:32.325828Z"},"content_sha256":"1046cc4f5775fc6a5b410f037ce0bcd74d1335131de9a23c5ec10e7f35ec7d7b","schema_version":"1.0","event_id":"sha256:1046cc4f5775fc6a5b410f037ce0bcd74d1335131de9a23c5ec10e7f35ec7d7b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:2SSRGJNWHVSH44HJLEOUJJBHTV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Phase retrieval with background compensation in 4f configuration: advanced augmented Lagrangian technique for amplitude object","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Artem Migukin, Mostafa Agour, Vladimir Katkovnik","submitted_at":"2012-07-22T22:23:47Z","abstract_excerpt":"Generally, wave field reconstructions obtained by phase-retrieval algorithms are noisy, blurred and corrupted by various artifacts such as irregular waves, spots, etc. These disturbances, arising due to many factors such as non-idealities of optical system (misalignment, focusing errors), dust on optical elements, reflections, vibration, are hard to be localized and specified. It is assumed that there is a generalized pupil function at the object plane which describes aberrations in the coherent imaging system manifested at the sensor plane. Here we propose a novel two steps phase-retrieval al"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.5264","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":"2026-05-18T03:50:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sqQ2YuJL5AnBaURXa6so7mhOyYm3WfXteyBFEOBu9Cu+ioAgZEvdxGlio8NrEP3z6fhxA7a+Jp6XRa5MMZENCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T15:38:32.326186Z"},"content_sha256":"5919869b79ca827d3ac8466c1ac8df986919e405ac221a2a7a0c2590c24c960e","schema_version":"1.0","event_id":"sha256:5919869b79ca827d3ac8466c1ac8df986919e405ac221a2a7a0c2590c24c960e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2SSRGJNWHVSH44HJLEOUJJBHTV/bundle.json","state_url":"https://pith.science/pith/2SSRGJNWHVSH44HJLEOUJJBHTV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2SSRGJNWHVSH44HJLEOUJJBHTV/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":"2026-06-25T15:38:32Z","links":{"resolver":"https://pith.science/pith/2SSRGJNWHVSH44HJLEOUJJBHTV","bundle":"https://pith.science/pith/2SSRGJNWHVSH44HJLEOUJJBHTV/bundle.json","state":"https://pith.science/pith/2SSRGJNWHVSH44HJLEOUJJBHTV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2SSRGJNWHVSH44HJLEOUJJBHTV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:2SSRGJNWHVSH44HJLEOUJJBHTV","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":"ea50152ff8a47f2ff7aaa264c7d8ee259dbc140f9bcb7c76710291c6e246c8e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-22T22:23:47Z","title_canon_sha256":"7c31126b26f544b576c8e3579336c64e6043633000cb46995950472ab484eec0"},"schema_version":"1.0","source":{"id":"1207.5264","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.5264","created_at":"2026-05-18T03:50:24Z"},{"alias_kind":"arxiv_version","alias_value":"1207.5264v1","created_at":"2026-05-18T03:50:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.5264","created_at":"2026-05-18T03:50:24Z"},{"alias_kind":"pith_short_12","alias_value":"2SSRGJNWHVSH","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2SSRGJNWHVSH44HJ","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2SSRGJNW","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:5919869b79ca827d3ac8466c1ac8df986919e405ac221a2a7a0c2590c24c960e","target":"graph","created_at":"2026-05-18T03:50:24Z","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":"Generally, wave field reconstructions obtained by phase-retrieval algorithms are noisy, blurred and corrupted by various artifacts such as irregular waves, spots, etc. These disturbances, arising due to many factors such as non-idealities of optical system (misalignment, focusing errors), dust on optical elements, reflections, vibration, are hard to be localized and specified. It is assumed that there is a generalized pupil function at the object plane which describes aberrations in the coherent imaging system manifested at the sensor plane. Here we propose a novel two steps phase-retrieval al","authors_text":"Artem Migukin, Mostafa Agour, Vladimir Katkovnik","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-22T22:23:47Z","title":"Phase retrieval with background compensation in 4f configuration: advanced augmented Lagrangian technique for amplitude object"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.5264","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":"sha256:1046cc4f5775fc6a5b410f037ce0bcd74d1335131de9a23c5ec10e7f35ec7d7b","target":"record","created_at":"2026-05-18T03:50:24Z","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":"ea50152ff8a47f2ff7aaa264c7d8ee259dbc140f9bcb7c76710291c6e246c8e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2012-07-22T22:23:47Z","title_canon_sha256":"7c31126b26f544b576c8e3579336c64e6043633000cb46995950472ab484eec0"},"schema_version":"1.0","source":{"id":"1207.5264","kind":"arxiv","version":1}},"canonical_sha256":"d4a51325b63d647e70e9591d44a4279d412b972c6a7e9f928ce84c3272acbf70","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d4a51325b63d647e70e9591d44a4279d412b972c6a7e9f928ce84c3272acbf70","first_computed_at":"2026-05-18T03:50:24.020210Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:50:24.020210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eDmZrhQie+dEcHZSlJhxeB8LtSN0JDOqdLLJYmMeMnuSfAG++IbK8gSmKPYkI9zDqyQ3kP0wfQtR9VTkuyqIBg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:50:24.021010Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.5264","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1046cc4f5775fc6a5b410f037ce0bcd74d1335131de9a23c5ec10e7f35ec7d7b","sha256:5919869b79ca827d3ac8466c1ac8df986919e405ac221a2a7a0c2590c24c960e"],"state_sha256":"f2a7125019747b59c125ff8dc7ee43b0816c84d23e583a5b7d652c074fbace60"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gz1J2RFwyYj/F6VNNlRM2akIBdD92J5liNaoPvcIZqZ487QQduTAVw1vqJLVXWTyM1hG7Er4I33IRHmH8CFhBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T15:38:32.328239Z","bundle_sha256":"32b367c6e0b506b6e2a20a99d8b955ba1542fa58b04a642b87f6078579a60ac3"}}