{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:YXMUJROW4KB7T3PBMG5GF5QZEM","short_pith_number":"pith:YXMUJROW","canonical_record":{"source":{"id":"1908.02825","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-07T20:30:21Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"82d81f6fe2346abaa63bb80f32363012ab3f34fc3dd93259e6e62e16abfdc50c","abstract_canon_sha256":"22399a4da206f29bcf42297aef6b840bf81e4c99581aab75de23be0a9480e09b"},"schema_version":"1.0"},"canonical_sha256":"c5d944c5d6e283f9ede161ba62f619232d1c06df3f8e2e3dce9ce2987f13b912","source":{"kind":"arxiv","id":"1908.02825","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02825","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02825v1","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02825","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"pith_short_12","alias_value":"YXMUJROW4KB7","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"pith_short_16","alias_value":"YXMUJROW4KB7T3PB","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"pith_short_8","alias_value":"YXMUJROW","created_at":"2026-07-04T23:52:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:YXMUJROW4KB7T3PBMG5GF5QZEM","target":"record","payload":{"canonical_record":{"source":{"id":"1908.02825","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-07T20:30:21Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"82d81f6fe2346abaa63bb80f32363012ab3f34fc3dd93259e6e62e16abfdc50c","abstract_canon_sha256":"22399a4da206f29bcf42297aef6b840bf81e4c99581aab75de23be0a9480e09b"},"schema_version":"1.0"},"canonical_sha256":"c5d944c5d6e283f9ede161ba62f619232d1c06df3f8e2e3dce9ce2987f13b912","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:52:23.751847Z","signature_b64":"C88kBJhMTCFIPStdaPCYkhJgEI4fuTIWx24W1H4I4qgWW0IdQANP81wD/deeXfBJSlhSqhQuML2dHflcDst2CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c5d944c5d6e283f9ede161ba62f619232d1c06df3f8e2e3dce9ce2987f13b912","last_reissued_at":"2026-07-04T23:52:23.751437Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:52:23.751437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.02825","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":"2026-07-04T23:52:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w8uDND5+4xBf3g30ha6cav7pRp5NUTKnMXqIXJkLc3m3bFEB+iBnL6YFgUMZWFIcxC9OHSKOr5oVIR5zgqC+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T03:26:59.218213Z"},"content_sha256":"64e97828425ea85bf374db6ab0b90cc174a81f17640a7ef04d17e880672c2def","schema_version":"1.0","event_id":"sha256:64e97828425ea85bf374db6ab0b90cc174a81f17640a7ef04d17e880672c2def"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:YXMUJROW4KB7T3PBMG5GF5QZEM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optoacoustic Model-Based Inversion Using Anisotropic Adaptive Total-Variation Regularization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP"],"primary_cat":"eess.IV","authors_text":"Amir Rosenthal, Gilad Drozdov, Guy Gilboa, Nadav Arbel, Shai Biton","submitted_at":"2019-08-07T20:30:21Z","abstract_excerpt":"In optoacoustic tomography, image reconstruction is often performed with incomplete or noisy data, leading to reconstruction errors. Significant improvement in reconstruction accuracy may be achieved in such cases by using nonlinear regularization schemes, such as total-variation minimization and $L_1$-based sparsity-preserving schemes. In this paper, we introduce a new framework for optoacoustic image reconstruction based on adaptive anisotropic total-variation regularization, which is more capable of preserving complex boundaries than conventional total-variation regularization. The new sche"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02825","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.02825/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T23:52:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"I66T3GoSr95+F7w+3r+hn0utOK5fWnLZlSTvCTAJCY510tJm9KMiZBK/pj9HLJrGcJu3n8u9YA/+JbSu4b2XDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T03:26:59.218716Z"},"content_sha256":"d45abf64fe6671ac32be7ae110975f8bf11b0c3b3484ee76543d186c02984a8e","schema_version":"1.0","event_id":"sha256:d45abf64fe6671ac32be7ae110975f8bf11b0c3b3484ee76543d186c02984a8e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YXMUJROW4KB7T3PBMG5GF5QZEM/bundle.json","state_url":"https://pith.science/pith/YXMUJROW4KB7T3PBMG5GF5QZEM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YXMUJROW4KB7T3PBMG5GF5QZEM/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":"2026-08-16T03:26:59Z","links":{"resolver":"https://pith.science/pith/YXMUJROW4KB7T3PBMG5GF5QZEM","bundle":"https://pith.science/pith/YXMUJROW4KB7T3PBMG5GF5QZEM/bundle.json","state":"https://pith.science/pith/YXMUJROW4KB7T3PBMG5GF5QZEM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YXMUJROW4KB7T3PBMG5GF5QZEM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:YXMUJROW4KB7T3PBMG5GF5QZEM","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":"22399a4da206f29bcf42297aef6b840bf81e4c99581aab75de23be0a9480e09b","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-07T20:30:21Z","title_canon_sha256":"82d81f6fe2346abaa63bb80f32363012ab3f34fc3dd93259e6e62e16abfdc50c"},"schema_version":"1.0","source":{"id":"1908.02825","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02825","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02825v1","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02825","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"pith_short_12","alias_value":"YXMUJROW4KB7","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"pith_short_16","alias_value":"YXMUJROW4KB7T3PB","created_at":"2026-07-04T23:52:23Z"},{"alias_kind":"pith_short_8","alias_value":"YXMUJROW","created_at":"2026-07-04T23:52:23Z"}],"graph_snapshots":[{"event_id":"sha256:d45abf64fe6671ac32be7ae110975f8bf11b0c3b3484ee76543d186c02984a8e","target":"graph","created_at":"2026-07-04T23:52:23Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.02825/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In optoacoustic tomography, image reconstruction is often performed with incomplete or noisy data, leading to reconstruction errors. Significant improvement in reconstruction accuracy may be achieved in such cases by using nonlinear regularization schemes, such as total-variation minimization and $L_1$-based sparsity-preserving schemes. In this paper, we introduce a new framework for optoacoustic image reconstruction based on adaptive anisotropic total-variation regularization, which is more capable of preserving complex boundaries than conventional total-variation regularization. The new sche","authors_text":"Amir Rosenthal, Gilad Drozdov, Guy Gilboa, Nadav Arbel, Shai Biton","cross_cats":["eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-07T20:30:21Z","title":"Optoacoustic Model-Based Inversion Using Anisotropic Adaptive Total-Variation Regularization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02825","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":"sha256:64e97828425ea85bf374db6ab0b90cc174a81f17640a7ef04d17e880672c2def","target":"record","created_at":"2026-07-04T23:52:23Z","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":"22399a4da206f29bcf42297aef6b840bf81e4c99581aab75de23be0a9480e09b","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-07T20:30:21Z","title_canon_sha256":"82d81f6fe2346abaa63bb80f32363012ab3f34fc3dd93259e6e62e16abfdc50c"},"schema_version":"1.0","source":{"id":"1908.02825","kind":"arxiv","version":1}},"canonical_sha256":"c5d944c5d6e283f9ede161ba62f619232d1c06df3f8e2e3dce9ce2987f13b912","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c5d944c5d6e283f9ede161ba62f619232d1c06df3f8e2e3dce9ce2987f13b912","first_computed_at":"2026-07-04T23:52:23.751437Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:52:23.751437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C88kBJhMTCFIPStdaPCYkhJgEI4fuTIWx24W1H4I4qgWW0IdQANP81wD/deeXfBJSlhSqhQuML2dHflcDst2CQ==","signature_status":"signed_v1","signed_at":"2026-07-04T23:52:23.751847Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.02825","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:64e97828425ea85bf374db6ab0b90cc174a81f17640a7ef04d17e880672c2def","sha256:d45abf64fe6671ac32be7ae110975f8bf11b0c3b3484ee76543d186c02984a8e"],"state_sha256":"8eaae484e23c0175a86fd4ca96644814d81729e8bd181ed22dfba6e44d296ebf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JTZhmsCK2rp72vHzENd02w9zFkPZ1SiXHU0Ycgl4yid+197ojvXP2p1UqqF5mAAUpE6fSlxshZIo1l08AzrXCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T03:26:59.222455Z","bundle_sha256":"1a2a40f23514f55a151bc4d22291969fa186321246ba4441b60493f31d2faf1f"}}