{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ROHUPRTL4OFP62CHAB3RV44TXV","short_pith_number":"pith:ROHUPRTL","canonical_record":{"source":{"id":"1804.10636","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2018-04-27T18:26:54Z","cross_cats_sorted":["eess.IV","physics.med-ph","stat.AP"],"title_canon_sha256":"a1a37ff1b943f050d09ec96ce30c1ed9796d3bf8ee20dec4bb541fcd525b3f99","abstract_canon_sha256":"02c601565f9903248d4e0093bd7e09e18b0ea8576653ad0c64d209b130603516"},"schema_version":"1.0"},"canonical_sha256":"8b8f47c66be38aff684700771af393bd4122edf7d5dd9b25be1a82d0383ea254","source":{"kind":"arxiv","id":"1804.10636","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.10636","created_at":"2026-05-17T23:46:55Z"},{"alias_kind":"arxiv_version","alias_value":"1804.10636v2","created_at":"2026-05-17T23:46:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.10636","created_at":"2026-05-17T23:46:55Z"},{"alias_kind":"pith_short_12","alias_value":"ROHUPRTL4OFP","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"ROHUPRTL4OFP62CH","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"ROHUPRTL","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ROHUPRTL4OFP62CHAB3RV44TXV","target":"record","payload":{"canonical_record":{"source":{"id":"1804.10636","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2018-04-27T18:26:54Z","cross_cats_sorted":["eess.IV","physics.med-ph","stat.AP"],"title_canon_sha256":"a1a37ff1b943f050d09ec96ce30c1ed9796d3bf8ee20dec4bb541fcd525b3f99","abstract_canon_sha256":"02c601565f9903248d4e0093bd7e09e18b0ea8576653ad0c64d209b130603516"},"schema_version":"1.0"},"canonical_sha256":"8b8f47c66be38aff684700771af393bd4122edf7d5dd9b25be1a82d0383ea254","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:55.400007Z","signature_b64":"f+GaSc94Q7SzsNSY54mUw3RWbOZnzReAGwNk5hdoTxtBWLChciYWidhlScIrz94MnGM3XhYjfRHED0mguWlhDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b8f47c66be38aff684700771af393bd4122edf7d5dd9b25be1a82d0383ea254","last_reissued_at":"2026-05-17T23:46:55.399541Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:55.399541Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.10636","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":"2026-05-17T23:46:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P4GGVagoX1lV3c7q7nX8u/jd/c1oQuexuXIn1BX+rt534MNq0REtxCP/1Zyjnv+Ba8zWOU2XV8kc4Y0cZfV7CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T09:27:24.079292Z"},"content_sha256":"d9e798b1a6ee044f12ef1a59398686c2eb3cee59983654e368247753c08260d4","schema_version":"1.0","event_id":"sha256:d9e798b1a6ee044f12ef1a59398686c2eb3cee59983654e368247753c08260d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ROHUPRTL4OFP62CHAB3RV44TXV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Reconstruction of optical vector-fields with applications in endoscopic imaging","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.IV","physics.med-ph","stat.AP"],"primary_cat":"math.NA","authors_text":"Alberto Gil C. P. Ramos, Francesco Renna, George S. D. Gordon, Maria P. Alcolea, Milana Gataric, Sarah E. Bohndiek","submitted_at":"2018-04-27T18:26:54Z","abstract_excerpt":"We introduce a framework for the reconstruction of the amplitude, phase and polarisation of an optical vector-field using calibration measurements acquired by an imaging device with an unknown linear transformation. By incorporating effective regularisation terms, this new approach is able to recover an optical vector-field with respect to an arbitrary representation system, which may be different from the one used in calibration. In particular, it enables the recovery of an optical vector-field with respect to a Fourier basis, which is shown to yield indicative features of increased scatterin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.10636","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":"2026-05-17T23:46:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CIPSX6QVXqyYoXiP1+Yv+tcQJNUMeyCpmW5rTOXykLLy8TxWKk6clm3osOI/LFqair2PhJHqVB9J6H76bvJtAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T09:27:24.079676Z"},"content_sha256":"4f8c2c1f2ca8263f39cab8eb5dce866522f3387563780278d6641aa9befe537c","schema_version":"1.0","event_id":"sha256:4f8c2c1f2ca8263f39cab8eb5dce866522f3387563780278d6641aa9befe537c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ROHUPRTL4OFP62CHAB3RV44TXV/bundle.json","state_url":"https://pith.science/pith/ROHUPRTL4OFP62CHAB3RV44TXV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ROHUPRTL4OFP62CHAB3RV44TXV/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":"2026-05-28T09:27:24Z","links":{"resolver":"https://pith.science/pith/ROHUPRTL4OFP62CHAB3RV44TXV","bundle":"https://pith.science/pith/ROHUPRTL4OFP62CHAB3RV44TXV/bundle.json","state":"https://pith.science/pith/ROHUPRTL4OFP62CHAB3RV44TXV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ROHUPRTL4OFP62CHAB3RV44TXV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ROHUPRTL4OFP62CHAB3RV44TXV","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":"02c601565f9903248d4e0093bd7e09e18b0ea8576653ad0c64d209b130603516","cross_cats_sorted":["eess.IV","physics.med-ph","stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2018-04-27T18:26:54Z","title_canon_sha256":"a1a37ff1b943f050d09ec96ce30c1ed9796d3bf8ee20dec4bb541fcd525b3f99"},"schema_version":"1.0","source":{"id":"1804.10636","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.10636","created_at":"2026-05-17T23:46:55Z"},{"alias_kind":"arxiv_version","alias_value":"1804.10636v2","created_at":"2026-05-17T23:46:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.10636","created_at":"2026-05-17T23:46:55Z"},{"alias_kind":"pith_short_12","alias_value":"ROHUPRTL4OFP","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"ROHUPRTL4OFP62CH","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"ROHUPRTL","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:4f8c2c1f2ca8263f39cab8eb5dce866522f3387563780278d6641aa9befe537c","target":"graph","created_at":"2026-05-17T23:46:55Z","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":"We introduce a framework for the reconstruction of the amplitude, phase and polarisation of an optical vector-field using calibration measurements acquired by an imaging device with an unknown linear transformation. By incorporating effective regularisation terms, this new approach is able to recover an optical vector-field with respect to an arbitrary representation system, which may be different from the one used in calibration. In particular, it enables the recovery of an optical vector-field with respect to a Fourier basis, which is shown to yield indicative features of increased scatterin","authors_text":"Alberto Gil C. P. Ramos, Francesco Renna, George S. D. Gordon, Maria P. Alcolea, Milana Gataric, Sarah E. Bohndiek","cross_cats":["eess.IV","physics.med-ph","stat.AP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2018-04-27T18:26:54Z","title":"Reconstruction of optical vector-fields with applications in endoscopic imaging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.10636","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:d9e798b1a6ee044f12ef1a59398686c2eb3cee59983654e368247753c08260d4","target":"record","created_at":"2026-05-17T23:46:55Z","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":"02c601565f9903248d4e0093bd7e09e18b0ea8576653ad0c64d209b130603516","cross_cats_sorted":["eess.IV","physics.med-ph","stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.NA","submitted_at":"2018-04-27T18:26:54Z","title_canon_sha256":"a1a37ff1b943f050d09ec96ce30c1ed9796d3bf8ee20dec4bb541fcd525b3f99"},"schema_version":"1.0","source":{"id":"1804.10636","kind":"arxiv","version":2}},"canonical_sha256":"8b8f47c66be38aff684700771af393bd4122edf7d5dd9b25be1a82d0383ea254","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8b8f47c66be38aff684700771af393bd4122edf7d5dd9b25be1a82d0383ea254","first_computed_at":"2026-05-17T23:46:55.399541Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:55.399541Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f+GaSc94Q7SzsNSY54mUw3RWbOZnzReAGwNk5hdoTxtBWLChciYWidhlScIrz94MnGM3XhYjfRHED0mguWlhDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:55.400007Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.10636","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d9e798b1a6ee044f12ef1a59398686c2eb3cee59983654e368247753c08260d4","sha256:4f8c2c1f2ca8263f39cab8eb5dce866522f3387563780278d6641aa9befe537c"],"state_sha256":"cf8cffe48d1cd67ce59a6f5e6c3b9f7202ba22be1b536b09c3b52b2d7bd9a301"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ihf6x0poZMh5xnjP+lXLIST8Pnat+3eeaLp2SL+wrqRBglMB1vpw4TcGTN8q4fRmas+ap4apfhlcibJAkBKvCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T09:27:24.081759Z","bundle_sha256":"505f0f777275b617e9cb5bfb2f033941351e16c10e3c6f0d79c6da800e3bf9dc"}}