{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:CAXT3DJ4VZKYZ4JAFASCD2MRUE","short_pith_number":"pith:CAXT3DJ4","canonical_record":{"source":{"id":"1905.06330","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-05-15T03:19:29Z","cross_cats_sorted":["cs.CV","cs.LG","stat.ML"],"title_canon_sha256":"b8aea287dec36a54e45b7c31e16a3b7b3d28ad765f22124c8717884493b9e5ef","abstract_canon_sha256":"e225fbc6e716ed983b84876679d050fbce762cb361324c161dcd691d882c7817"},"schema_version":"1.0"},"canonical_sha256":"102f3d8d3cae558cf120282421e991a1305bd5797988dadb89dbe14525ba3c88","source":{"kind":"arxiv","id":"1905.06330","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.06330","created_at":"2026-05-17T23:46:02Z"},{"alias_kind":"arxiv_version","alias_value":"1905.06330v1","created_at":"2026-05-17T23:46:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.06330","created_at":"2026-05-17T23:46:02Z"},{"alias_kind":"pith_short_12","alias_value":"CAXT3DJ4VZKY","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"CAXT3DJ4VZKYZ4JA","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"CAXT3DJ4","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:CAXT3DJ4VZKYZ4JAFASCD2MRUE","target":"record","payload":{"canonical_record":{"source":{"id":"1905.06330","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-05-15T03:19:29Z","cross_cats_sorted":["cs.CV","cs.LG","stat.ML"],"title_canon_sha256":"b8aea287dec36a54e45b7c31e16a3b7b3d28ad765f22124c8717884493b9e5ef","abstract_canon_sha256":"e225fbc6e716ed983b84876679d050fbce762cb361324c161dcd691d882c7817"},"schema_version":"1.0"},"canonical_sha256":"102f3d8d3cae558cf120282421e991a1305bd5797988dadb89dbe14525ba3c88","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:02.732286Z","signature_b64":"jR8INwDkj/xbo6a7+OMLqcmdJwls8ZsLeZaztqgGr4JearEwT396Kjlsbt/qdkVZUNvPQdxqkpoyNDgLfIewAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"102f3d8d3cae558cf120282421e991a1305bd5797988dadb89dbe14525ba3c88","last_reissued_at":"2026-05-17T23:46:02.731657Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:02.731657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.06330","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":"2026-05-17T23:46:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZmV4QU4UIa4g29YEtR4/h2vA/elC30D3BskR9d/KFYAwBX2nXSuQOxGVi/XvuNW/a38m4iQJGlAdSc/OlbxXDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T18:57:18.840494Z"},"content_sha256":"824dfa6d467f0f127a985e61498397ab66ab401f496d61590d602746aad427d5","schema_version":"1.0","event_id":"sha256:824dfa6d467f0f127a985e61498397ab66ab401f496d61590d602746aad427d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:CAXT3DJ4VZKYZ4JAFASCD2MRUE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Approximating the Ideal Observer and Hotelling Observer for binary signal detection tasks by use of supervised learning methods","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV","cs.LG","stat.ML"],"primary_cat":"eess.SP","authors_text":"Hua Li, Mark A. Anastasio, Weimin Zhou","submitted_at":"2019-05-15T03:19:29Z","abstract_excerpt":"It is widely accepted that optimization of medical imaging system performance should be guided by task-based measures of image quality (IQ). Task-based measures of IQ quantify the ability of an observer to perform a specific task such as detection or estimation of a signal (e.g., a tumor). For binary signal detection tasks, the Bayesian Ideal Observer (IO) sets an upper limit of observer performance and has been advocated for use in optimizing medical imaging systems and data-acquisition designs. Except in special cases, determination of the IO test statistic is analytically intractable. Marko"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.06330","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":"2026-05-17T23:46:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y2tVR0CTY4M6PvNm29YFT3HhwyRBXwwERPkSu3Bnh6Gum0OhHfU5RJg3PxbrSODVb/A7G41c5PsEYreKmPxuAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T18:57:18.840855Z"},"content_sha256":"b15d203037e4904c819317204e9fa6311e67319a33dabe40bc3f549b879c2cd6","schema_version":"1.0","event_id":"sha256:b15d203037e4904c819317204e9fa6311e67319a33dabe40bc3f549b879c2cd6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CAXT3DJ4VZKYZ4JAFASCD2MRUE/bundle.json","state_url":"https://pith.science/pith/CAXT3DJ4VZKYZ4JAFASCD2MRUE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CAXT3DJ4VZKYZ4JAFASCD2MRUE/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":"2026-06-03T18:57:18Z","links":{"resolver":"https://pith.science/pith/CAXT3DJ4VZKYZ4JAFASCD2MRUE","bundle":"https://pith.science/pith/CAXT3DJ4VZKYZ4JAFASCD2MRUE/bundle.json","state":"https://pith.science/pith/CAXT3DJ4VZKYZ4JAFASCD2MRUE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CAXT3DJ4VZKYZ4JAFASCD2MRUE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:CAXT3DJ4VZKYZ4JAFASCD2MRUE","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":"e225fbc6e716ed983b84876679d050fbce762cb361324c161dcd691d882c7817","cross_cats_sorted":["cs.CV","cs.LG","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-05-15T03:19:29Z","title_canon_sha256":"b8aea287dec36a54e45b7c31e16a3b7b3d28ad765f22124c8717884493b9e5ef"},"schema_version":"1.0","source":{"id":"1905.06330","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.06330","created_at":"2026-05-17T23:46:02Z"},{"alias_kind":"arxiv_version","alias_value":"1905.06330v1","created_at":"2026-05-17T23:46:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.06330","created_at":"2026-05-17T23:46:02Z"},{"alias_kind":"pith_short_12","alias_value":"CAXT3DJ4VZKY","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"CAXT3DJ4VZKYZ4JA","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"CAXT3DJ4","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:b15d203037e4904c819317204e9fa6311e67319a33dabe40bc3f549b879c2cd6","target":"graph","created_at":"2026-05-17T23:46:02Z","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":"It is widely accepted that optimization of medical imaging system performance should be guided by task-based measures of image quality (IQ). Task-based measures of IQ quantify the ability of an observer to perform a specific task such as detection or estimation of a signal (e.g., a tumor). For binary signal detection tasks, the Bayesian Ideal Observer (IO) sets an upper limit of observer performance and has been advocated for use in optimizing medical imaging systems and data-acquisition designs. Except in special cases, determination of the IO test statistic is analytically intractable. Marko","authors_text":"Hua Li, Mark A. Anastasio, Weimin Zhou","cross_cats":["cs.CV","cs.LG","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-05-15T03:19:29Z","title":"Approximating the Ideal Observer and Hotelling Observer for binary signal detection tasks by use of supervised learning methods"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.06330","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":"sha256:824dfa6d467f0f127a985e61498397ab66ab401f496d61590d602746aad427d5","target":"record","created_at":"2026-05-17T23:46:02Z","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":"e225fbc6e716ed983b84876679d050fbce762cb361324c161dcd691d882c7817","cross_cats_sorted":["cs.CV","cs.LG","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-05-15T03:19:29Z","title_canon_sha256":"b8aea287dec36a54e45b7c31e16a3b7b3d28ad765f22124c8717884493b9e5ef"},"schema_version":"1.0","source":{"id":"1905.06330","kind":"arxiv","version":1}},"canonical_sha256":"102f3d8d3cae558cf120282421e991a1305bd5797988dadb89dbe14525ba3c88","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"102f3d8d3cae558cf120282421e991a1305bd5797988dadb89dbe14525ba3c88","first_computed_at":"2026-05-17T23:46:02.731657Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:02.731657Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jR8INwDkj/xbo6a7+OMLqcmdJwls8ZsLeZaztqgGr4JearEwT396Kjlsbt/qdkVZUNvPQdxqkpoyNDgLfIewAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:02.732286Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.06330","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:824dfa6d467f0f127a985e61498397ab66ab401f496d61590d602746aad427d5","sha256:b15d203037e4904c819317204e9fa6311e67319a33dabe40bc3f549b879c2cd6"],"state_sha256":"84537f9eeb2fc479f4304b57c13ab3d9b930807bed5d5f4c558b32b67e2e9690"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A9HxGV0r7HNVF0jLIoVrwUB1SGWoDrMMW64ct//fzH2k5SjgNjRpVzbmRMIsbTSDPzJr0uD24fN1SQvnnbtPCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T18:57:18.842860Z","bundle_sha256":"b58eb0cb47363175e12722718ddb68e5f7ac306e7ccff17a5608f4e1645eeffa"}}