{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:3TNYKOCAJ6NDSHCDKVQZYZBHVG","short_pith_number":"pith:3TNYKOCA","canonical_record":{"source":{"id":"1905.09588","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-05-23T11:12:12Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"f8c1ea3340f76647425d9d468b331e52b6971d330e711537b91b2ed2834e6622","abstract_canon_sha256":"896963492c7b8a114119c8ee5270a25fb92c47db41185411cdbb2816745d33a5"},"schema_version":"1.0"},"canonical_sha256":"dcdb8538404f9a391c4355619c6427a99498d8edcb391d564fe8da8c9ecb571d","source":{"kind":"arxiv","id":"1905.09588","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.09588","created_at":"2026-05-17T23:45:16Z"},{"alias_kind":"arxiv_version","alias_value":"1905.09588v1","created_at":"2026-05-17T23:45:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.09588","created_at":"2026-05-17T23:45:16Z"},{"alias_kind":"pith_short_12","alias_value":"3TNYKOCAJ6ND","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"3TNYKOCAJ6NDSHCD","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"3TNYKOCA","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:3TNYKOCAJ6NDSHCDKVQZYZBHVG","target":"record","payload":{"canonical_record":{"source":{"id":"1905.09588","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-05-23T11:12:12Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"f8c1ea3340f76647425d9d468b331e52b6971d330e711537b91b2ed2834e6622","abstract_canon_sha256":"896963492c7b8a114119c8ee5270a25fb92c47db41185411cdbb2816745d33a5"},"schema_version":"1.0"},"canonical_sha256":"dcdb8538404f9a391c4355619c6427a99498d8edcb391d564fe8da8c9ecb571d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:45:16.628262Z","signature_b64":"SCK+aGYVGMbilJw36tpT1DP2AZA+l5lx+sRki8p9/0zMT2NK+/PlRoMK16p2SpqyKwm6PrJu5hResYtrQLwbBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dcdb8538404f9a391c4355619c6427a99498d8edcb391d564fe8da8c9ecb571d","last_reissued_at":"2026-05-17T23:45:16.627696Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:45:16.627696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.09588","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":"2026-05-17T23:45:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LzwHFwAKdCS/OzC71E+ZetDa+kbr9NeV2mn+6tNYJ6WEKgvNvLZd//8tMYzj9iBDO2NfeiOdM5+/gF8tTwFYAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T03:02:12.272281Z"},"content_sha256":"f1cfc4f5cf6a616f62ba730b544997da52c90fe0f148a43c530285f52b14e667","schema_version":"1.0","event_id":"sha256:f1cfc4f5cf6a616f62ba730b544997da52c90fe0f148a43c530285f52b14e667"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:3TNYKOCAJ6NDSHCDKVQZYZBHVG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Underwater Stereo using Refraction-free Image Synthesized from Light Field Camera","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"eess.IV","authors_text":"Hiroshi Kawasaki, Kazuto Ichimaru","submitted_at":"2019-05-23T11:12:12Z","abstract_excerpt":"There is a strong demand on capturing underwater scenes without distortions caused by refraction. Since a light field camera can capture several light rays at each point of an image plane from various directions, if geometrically correct rays are chosen, it is possible to synthesize a refraction-free image. In this paper, we propose a novel technique to efficiently select such rays to synthesize a refraction-free image from an underwater image captured by a light field camera. In addition, we propose a stereo technique to reconstruct 3D shapes using a pair of our refraction-free images, which "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.09588","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":"2026-05-17T23:45:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RWumph+RpI51IQ8vnRmmTzOGkEQGCaUtaT38voHSc2i31eZI9++GWYlCirXAIsNf98O7y5BGYbAECupjNBRZDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T03:02:12.272659Z"},"content_sha256":"884f3259c63f737db3ddce4b2eb53ffb0bc511a7e4a8b1ad17c7988fdfdd460f","schema_version":"1.0","event_id":"sha256:884f3259c63f737db3ddce4b2eb53ffb0bc511a7e4a8b1ad17c7988fdfdd460f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3TNYKOCAJ6NDSHCDKVQZYZBHVG/bundle.json","state_url":"https://pith.science/pith/3TNYKOCAJ6NDSHCDKVQZYZBHVG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3TNYKOCAJ6NDSHCDKVQZYZBHVG/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":"2026-06-26T03:02:12Z","links":{"resolver":"https://pith.science/pith/3TNYKOCAJ6NDSHCDKVQZYZBHVG","bundle":"https://pith.science/pith/3TNYKOCAJ6NDSHCDKVQZYZBHVG/bundle.json","state":"https://pith.science/pith/3TNYKOCAJ6NDSHCDKVQZYZBHVG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3TNYKOCAJ6NDSHCDKVQZYZBHVG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:3TNYKOCAJ6NDSHCDKVQZYZBHVG","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":"896963492c7b8a114119c8ee5270a25fb92c47db41185411cdbb2816745d33a5","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-05-23T11:12:12Z","title_canon_sha256":"f8c1ea3340f76647425d9d468b331e52b6971d330e711537b91b2ed2834e6622"},"schema_version":"1.0","source":{"id":"1905.09588","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.09588","created_at":"2026-05-17T23:45:16Z"},{"alias_kind":"arxiv_version","alias_value":"1905.09588v1","created_at":"2026-05-17T23:45:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.09588","created_at":"2026-05-17T23:45:16Z"},{"alias_kind":"pith_short_12","alias_value":"3TNYKOCAJ6ND","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"3TNYKOCAJ6NDSHCD","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"3TNYKOCA","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:884f3259c63f737db3ddce4b2eb53ffb0bc511a7e4a8b1ad17c7988fdfdd460f","target":"graph","created_at":"2026-05-17T23:45:16Z","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":"There is a strong demand on capturing underwater scenes without distortions caused by refraction. Since a light field camera can capture several light rays at each point of an image plane from various directions, if geometrically correct rays are chosen, it is possible to synthesize a refraction-free image. In this paper, we propose a novel technique to efficiently select such rays to synthesize a refraction-free image from an underwater image captured by a light field camera. In addition, we propose a stereo technique to reconstruct 3D shapes using a pair of our refraction-free images, which ","authors_text":"Hiroshi Kawasaki, Kazuto Ichimaru","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-05-23T11:12:12Z","title":"Underwater Stereo using Refraction-free Image Synthesized from Light Field Camera"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.09588","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:f1cfc4f5cf6a616f62ba730b544997da52c90fe0f148a43c530285f52b14e667","target":"record","created_at":"2026-05-17T23:45:16Z","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":"896963492c7b8a114119c8ee5270a25fb92c47db41185411cdbb2816745d33a5","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-05-23T11:12:12Z","title_canon_sha256":"f8c1ea3340f76647425d9d468b331e52b6971d330e711537b91b2ed2834e6622"},"schema_version":"1.0","source":{"id":"1905.09588","kind":"arxiv","version":1}},"canonical_sha256":"dcdb8538404f9a391c4355619c6427a99498d8edcb391d564fe8da8c9ecb571d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dcdb8538404f9a391c4355619c6427a99498d8edcb391d564fe8da8c9ecb571d","first_computed_at":"2026-05-17T23:45:16.627696Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:16.627696Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SCK+aGYVGMbilJw36tpT1DP2AZA+l5lx+sRki8p9/0zMT2NK+/PlRoMK16p2SpqyKwm6PrJu5hResYtrQLwbBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:16.628262Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.09588","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f1cfc4f5cf6a616f62ba730b544997da52c90fe0f148a43c530285f52b14e667","sha256:884f3259c63f737db3ddce4b2eb53ffb0bc511a7e4a8b1ad17c7988fdfdd460f"],"state_sha256":"62b239bf8a26a6b1b229d1593ccefb06f41dd3580b699352bc2667ef6ccfe1fa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nbiRjAVOFtFERw0FFOw5+0qoYNlFGCM55WrHOWDdyXHKzs+awbydXzpFq3gYfRmBSXoJ+nMe0I7S7b8KhqjpAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T03:02:12.274776Z","bundle_sha256":"de4e2bb70910b6fa8b141d07789a42ed8630eadd7a58c7ef092bcaa1b18bc48a"}}