{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:LQJNH6RC6C3GPWCBV3HYLPRCRE","short_pith_number":"pith:LQJNH6RC","canonical_record":{"source":{"id":"1906.12075","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-06-28T07:45:19Z","cross_cats_sorted":[],"title_canon_sha256":"b6030e79c3f1fa01f308616c14c841c64485f26b841b3490216b168103cdcb78","abstract_canon_sha256":"5e43461f25d68b7b2c6b7c197a85fe8cec36ede9d71cfd965d8689e99aabb786"},"schema_version":"1.0"},"canonical_sha256":"5c12d3fa22f0b667d841aecf85be22893c09810c25020bdc4dfb19309f33c14a","source":{"kind":"arxiv","id":"1906.12075","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.12075","created_at":"2026-05-17T23:41:59Z"},{"alias_kind":"arxiv_version","alias_value":"1906.12075v1","created_at":"2026-05-17T23:41:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.12075","created_at":"2026-05-17T23:41:59Z"},{"alias_kind":"pith_short_12","alias_value":"LQJNH6RC6C3G","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LQJNH6RC6C3GPWCB","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LQJNH6RC","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:LQJNH6RC6C3GPWCBV3HYLPRCRE","target":"record","payload":{"canonical_record":{"source":{"id":"1906.12075","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-06-28T07:45:19Z","cross_cats_sorted":[],"title_canon_sha256":"b6030e79c3f1fa01f308616c14c841c64485f26b841b3490216b168103cdcb78","abstract_canon_sha256":"5e43461f25d68b7b2c6b7c197a85fe8cec36ede9d71cfd965d8689e99aabb786"},"schema_version":"1.0"},"canonical_sha256":"5c12d3fa22f0b667d841aecf85be22893c09810c25020bdc4dfb19309f33c14a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:41:59.336198Z","signature_b64":"8aWaUZDb7w763eRu7Yyawm0NwL0o78nT0MTxcsGH5fRKGcWOXk6J9FjY4Ab6ZBEsBnKzRidE/+i6aW6VMatRBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5c12d3fa22f0b667d841aecf85be22893c09810c25020bdc4dfb19309f33c14a","last_reissued_at":"2026-05-17T23:41:59.335626Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:41:59.335626Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.12075","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":"2026-05-17T23:41:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qL+wowDd9n82h40ITet6I/o3wmS4XrE3ASqdwsBrJHTkm7yBDTsNPI4Tx2rU5QhqkH8OTjoFdi9tG+FD1dFeBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T09:59:22.124225Z"},"content_sha256":"3d57294ec55a4a7e24f619c46467ed3b4c8e7588395256afd0ec11e40cad8aea","schema_version":"1.0","event_id":"sha256:3d57294ec55a4a7e24f619c46467ed3b4c8e7588395256afd0ec11e40cad8aea"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:LQJNH6RC6C3GPWCBV3HYLPRCRE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A linear method for camera pair self-calibration and multi-view reconstruction with geometrically verified correspondences","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Nikos Melanitis, Petros Maragos","submitted_at":"2019-06-28T07:45:19Z","abstract_excerpt":"We examine 3D reconstruction of architectural scenes in unordered sets of uncalibrated images. We introduce a linear method to self-calibrate and find the metric reconstruction of a camera pair. We assume unknown and different focal lengths but otherwise known internal camera parameters and a known projective reconstruction of the camera pair. We recover two possible camera configurations in space and use the Cheirality condition, that all 3D scene points are in front of both cameras, to disambiguate the solution. We show in two Theorems, first that the two solutions are in mirror positions an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.12075","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":"2026-05-17T23:41:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IZFyCkgjgnR1pfrEorNVzS6zMFKA1uztSM/DsGLx5Rrn59fbGvqv80X955OI8QFapS5IOLJVjGdOk2XQjXfkDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T09:59:22.124600Z"},"content_sha256":"be75367b308da2984884b989f9062aac7f5de404788276330d71e05d76539478","schema_version":"1.0","event_id":"sha256:be75367b308da2984884b989f9062aac7f5de404788276330d71e05d76539478"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LQJNH6RC6C3GPWCBV3HYLPRCRE/bundle.json","state_url":"https://pith.science/pith/LQJNH6RC6C3GPWCBV3HYLPRCRE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LQJNH6RC6C3GPWCBV3HYLPRCRE/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":"2026-06-08T09:59:22Z","links":{"resolver":"https://pith.science/pith/LQJNH6RC6C3GPWCBV3HYLPRCRE","bundle":"https://pith.science/pith/LQJNH6RC6C3GPWCBV3HYLPRCRE/bundle.json","state":"https://pith.science/pith/LQJNH6RC6C3GPWCBV3HYLPRCRE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LQJNH6RC6C3GPWCBV3HYLPRCRE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:LQJNH6RC6C3GPWCBV3HYLPRCRE","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":"5e43461f25d68b7b2c6b7c197a85fe8cec36ede9d71cfd965d8689e99aabb786","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-06-28T07:45:19Z","title_canon_sha256":"b6030e79c3f1fa01f308616c14c841c64485f26b841b3490216b168103cdcb78"},"schema_version":"1.0","source":{"id":"1906.12075","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.12075","created_at":"2026-05-17T23:41:59Z"},{"alias_kind":"arxiv_version","alias_value":"1906.12075v1","created_at":"2026-05-17T23:41:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.12075","created_at":"2026-05-17T23:41:59Z"},{"alias_kind":"pith_short_12","alias_value":"LQJNH6RC6C3G","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LQJNH6RC6C3GPWCB","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LQJNH6RC","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:be75367b308da2984884b989f9062aac7f5de404788276330d71e05d76539478","target":"graph","created_at":"2026-05-17T23:41:59Z","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 examine 3D reconstruction of architectural scenes in unordered sets of uncalibrated images. We introduce a linear method to self-calibrate and find the metric reconstruction of a camera pair. We assume unknown and different focal lengths but otherwise known internal camera parameters and a known projective reconstruction of the camera pair. We recover two possible camera configurations in space and use the Cheirality condition, that all 3D scene points are in front of both cameras, to disambiguate the solution. We show in two Theorems, first that the two solutions are in mirror positions an","authors_text":"Nikos Melanitis, Petros Maragos","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-06-28T07:45:19Z","title":"A linear method for camera pair self-calibration and multi-view reconstruction with geometrically verified correspondences"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.12075","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":"sha256:3d57294ec55a4a7e24f619c46467ed3b4c8e7588395256afd0ec11e40cad8aea","target":"record","created_at":"2026-05-17T23:41:59Z","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":"5e43461f25d68b7b2c6b7c197a85fe8cec36ede9d71cfd965d8689e99aabb786","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-06-28T07:45:19Z","title_canon_sha256":"b6030e79c3f1fa01f308616c14c841c64485f26b841b3490216b168103cdcb78"},"schema_version":"1.0","source":{"id":"1906.12075","kind":"arxiv","version":1}},"canonical_sha256":"5c12d3fa22f0b667d841aecf85be22893c09810c25020bdc4dfb19309f33c14a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5c12d3fa22f0b667d841aecf85be22893c09810c25020bdc4dfb19309f33c14a","first_computed_at":"2026-05-17T23:41:59.335626Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:41:59.335626Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8aWaUZDb7w763eRu7Yyawm0NwL0o78nT0MTxcsGH5fRKGcWOXk6J9FjY4Ab6ZBEsBnKzRidE/+i6aW6VMatRBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:41:59.336198Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.12075","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d57294ec55a4a7e24f619c46467ed3b4c8e7588395256afd0ec11e40cad8aea","sha256:be75367b308da2984884b989f9062aac7f5de404788276330d71e05d76539478"],"state_sha256":"debb5b103b6549a88b5db35506c3b5037e6a38bb2c64dbcea27f8fcc5a490f67"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Yp1t6J6lfFwmMJAUe5K/75d8oOLQoAz5Cgl2ITar/0k+admoeZ7MGhV12fc4Tw/Ag+B9b9sJsCuOr/CUnquGDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T09:59:22.126699Z","bundle_sha256":"c76dffc44ccc8eadb03707bfa8819fc0d13daa977ff52cab7934dbb0d75436ca"}}