{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GZGMWYMBTDWWEAYSBB57IHEMOP","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":"58daf60c19eb487c2fce0ada18f72b5e9eb9eaf3d109bc47c7b2074aa9130812","cross_cats_sorted":["cs.CV","cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2018-09-29T03:17:15Z","title_canon_sha256":"20df4bdf778d3cf6b1fc7e060c2c1093842cf2b6742340c8784b400bdfa9a220"},"schema_version":"1.0","source":{"id":"1810.00138","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.00138","created_at":"2026-05-18T00:02:48Z"},{"alias_kind":"arxiv_version","alias_value":"1810.00138v2","created_at":"2026-05-18T00:02:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.00138","created_at":"2026-05-18T00:02:48Z"},{"alias_kind":"pith_short_12","alias_value":"GZGMWYMBTDWW","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GZGMWYMBTDWWEAYS","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GZGMWYMB","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:3d3a39ba3a6b170ab7e5835e5f6fa3e2f55b3233841b634365cd99d413a13027","target":"graph","created_at":"2026-05-18T00:02:48Z","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":"X-ray imaging is a fundamental tool of routine clinical diagnosis. Fluoroscopic imaging can further acquire X-ray images at video frame rates, thus enabling non-invasive in-vivo motion studies of joints, gastrointestinal tract, etc. For both the qualitative and quantitative analysis of static and dynamic X-ray images, the data should be free of systematic biases. Besides precise fabrication of hardware, software-based calibration solutions are commonly used for modelling the distortions. In this primary research study, a robust photogrammetric bundle adjustment was used to model the projective","authors_text":"Derek Lichti, Gregor Kuntze, Gulshan Sharma, Jacky C.K. Chow, Janet Ronsky, Kathleen Ang","cross_cats":["cs.CV","cs.LG"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2018-09-29T03:17:15Z","title":"Modelling Errors in X-ray Fluoroscopic Imaging Systems Using Photogrammetric Bundle Adjustment With a Data-Driven Self-Calibration Approach"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.00138","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":"sha256:5bf9238e450272d978878ca97f944e551aefe998707066742c0ebf8971a9feb8","target":"record","created_at":"2026-05-18T00:02:48Z","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":"58daf60c19eb487c2fce0ada18f72b5e9eb9eaf3d109bc47c7b2074aa9130812","cross_cats_sorted":["cs.CV","cs.LG"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2018-09-29T03:17:15Z","title_canon_sha256":"20df4bdf778d3cf6b1fc7e060c2c1093842cf2b6742340c8784b400bdfa9a220"},"schema_version":"1.0","source":{"id":"1810.00138","kind":"arxiv","version":2}},"canonical_sha256":"364ccb618198ed620312087bf41c8c73f9a99120d1cf894cb1b37e825f5d384f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"364ccb618198ed620312087bf41c8c73f9a99120d1cf894cb1b37e825f5d384f","first_computed_at":"2026-05-18T00:02:48.998055Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:02:48.998055Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e7cx2oM5qVBdOqkpiWLC3RI4V0gqvLZrm2SbP4sGat7IicFP0ydQjCnQVcAjv37VUHiY/37EY2ZjUHy6Lcu0Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:02:48.998693Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.00138","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bf9238e450272d978878ca97f944e551aefe998707066742c0ebf8971a9feb8","sha256:3d3a39ba3a6b170ab7e5835e5f6fa3e2f55b3233841b634365cd99d413a13027"],"state_sha256":"ef051de269a4cef7aa073f23c629acb68db95fb8aa4f0327b6635dc9b21ae6f4"}