{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:VLLGDCXZ4MEUKMIDFBQ4WRQRPQ","short_pith_number":"pith:VLLGDCXZ","canonical_record":{"source":{"id":"1702.03600","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-02-13T00:40:59Z","cross_cats_sorted":[],"title_canon_sha256":"4eb5887d94af6de2b0b3441d5d93e27450fbcc05fafbeafdee872a7cc09b17a7","abstract_canon_sha256":"5027d3262a2d9bfe2b14811b3c35d3f4ee7fbf6cf092e5c5998cbb2e24bc054a"},"schema_version":"1.0"},"canonical_sha256":"aad6618af9e3094531032861cb46117c0e0605c03620694c8fe5df7a41bfb866","source":{"kind":"arxiv","id":"1702.03600","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.03600","created_at":"2026-05-18T00:50:53Z"},{"alias_kind":"arxiv_version","alias_value":"1702.03600v1","created_at":"2026-05-18T00:50:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.03600","created_at":"2026-05-18T00:50:53Z"},{"alias_kind":"pith_short_12","alias_value":"VLLGDCXZ4MEU","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VLLGDCXZ4MEUKMID","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VLLGDCXZ","created_at":"2026-05-18T12:31:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:VLLGDCXZ4MEUKMIDFBQ4WRQRPQ","target":"record","payload":{"canonical_record":{"source":{"id":"1702.03600","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-02-13T00:40:59Z","cross_cats_sorted":[],"title_canon_sha256":"4eb5887d94af6de2b0b3441d5d93e27450fbcc05fafbeafdee872a7cc09b17a7","abstract_canon_sha256":"5027d3262a2d9bfe2b14811b3c35d3f4ee7fbf6cf092e5c5998cbb2e24bc054a"},"schema_version":"1.0"},"canonical_sha256":"aad6618af9e3094531032861cb46117c0e0605c03620694c8fe5df7a41bfb866","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:53.418599Z","signature_b64":"5TwGHQe86VDv/Sa4xMRHjI2yDQI4epWPAc2X4sltY80LW03Jmp1kb+EQeiCQkUZUacEwgaDC74djhOzcuC1sAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aad6618af9e3094531032861cb46117c0e0605c03620694c8fe5df7a41bfb866","last_reissued_at":"2026-05-18T00:50:53.418076Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:53.418076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.03600","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":"2026-05-18T00:50:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fjlKpUVaWyMphav+VMXQ7l7n38UgkdOwK4NjlhLspJgYrD7RmmB+/IagXPP0ewzO2ltFabtTuCK18Lkj0oJXDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:08:15.675648Z"},"content_sha256":"05f273188156d8bc5cf4d7d4663fe576ef8b7651107ed178991beb66bb12c848","schema_version":"1.0","event_id":"sha256:05f273188156d8bc5cf4d7d4663fe576ef8b7651107ed178991beb66bb12c848"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:VLLGDCXZ4MEUKMIDFBQ4WRQRPQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Underwater Optical Image Processing: A Comprehensive Review","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Huimin Lu, Hyoungseop Kim, Min Chen, Seiichi Serikawa, Yudong Zhang, Yujie Li","submitted_at":"2017-02-13T00:40:59Z","abstract_excerpt":"Underwater cameras are widely used to observe the sea floor. They are usually included in autonomous underwater vehicles, unmanned underwater vehicles, and in situ ocean sensor networks. Despite being an important sensor for monitoring underwater scenes, there exist many issues with recent underwater camera sensors. Because of lights transportation characteristics in water and the biological activity at the sea floor, the acquired underwater images often suffer from scatters and large amounts of noise. Over the last five years, many methods have been proposed to overcome traditional underwater"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.03600","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":"2026-05-18T00:50:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PQAMKHv9NZ35jrt3HiGCNoMgLPdEF7fnLS7/xVEOvsCOpfNnefY/LKqpBhY5ma4d/dLsqD40F56za0BuwNoOAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:08:15.676377Z"},"content_sha256":"4fdea6c817069e39fdcdd5760eba6ee9fb94b8dd5dab8b6fa26675eb96a1f868","schema_version":"1.0","event_id":"sha256:4fdea6c817069e39fdcdd5760eba6ee9fb94b8dd5dab8b6fa26675eb96a1f868"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VLLGDCXZ4MEUKMIDFBQ4WRQRPQ/bundle.json","state_url":"https://pith.science/pith/VLLGDCXZ4MEUKMIDFBQ4WRQRPQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VLLGDCXZ4MEUKMIDFBQ4WRQRPQ/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":"2026-06-08T19:08:15Z","links":{"resolver":"https://pith.science/pith/VLLGDCXZ4MEUKMIDFBQ4WRQRPQ","bundle":"https://pith.science/pith/VLLGDCXZ4MEUKMIDFBQ4WRQRPQ/bundle.json","state":"https://pith.science/pith/VLLGDCXZ4MEUKMIDFBQ4WRQRPQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VLLGDCXZ4MEUKMIDFBQ4WRQRPQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:VLLGDCXZ4MEUKMIDFBQ4WRQRPQ","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":"5027d3262a2d9bfe2b14811b3c35d3f4ee7fbf6cf092e5c5998cbb2e24bc054a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-02-13T00:40:59Z","title_canon_sha256":"4eb5887d94af6de2b0b3441d5d93e27450fbcc05fafbeafdee872a7cc09b17a7"},"schema_version":"1.0","source":{"id":"1702.03600","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.03600","created_at":"2026-05-18T00:50:53Z"},{"alias_kind":"arxiv_version","alias_value":"1702.03600v1","created_at":"2026-05-18T00:50:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.03600","created_at":"2026-05-18T00:50:53Z"},{"alias_kind":"pith_short_12","alias_value":"VLLGDCXZ4MEU","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"VLLGDCXZ4MEUKMID","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"VLLGDCXZ","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:4fdea6c817069e39fdcdd5760eba6ee9fb94b8dd5dab8b6fa26675eb96a1f868","target":"graph","created_at":"2026-05-18T00:50:53Z","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":"Underwater cameras are widely used to observe the sea floor. They are usually included in autonomous underwater vehicles, unmanned underwater vehicles, and in situ ocean sensor networks. Despite being an important sensor for monitoring underwater scenes, there exist many issues with recent underwater camera sensors. Because of lights transportation characteristics in water and the biological activity at the sea floor, the acquired underwater images often suffer from scatters and large amounts of noise. Over the last five years, many methods have been proposed to overcome traditional underwater","authors_text":"Huimin Lu, Hyoungseop Kim, Min Chen, Seiichi Serikawa, Yudong Zhang, Yujie Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-02-13T00:40:59Z","title":"Underwater Optical Image Processing: A Comprehensive Review"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.03600","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":"sha256:05f273188156d8bc5cf4d7d4663fe576ef8b7651107ed178991beb66bb12c848","target":"record","created_at":"2026-05-18T00:50:53Z","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":"5027d3262a2d9bfe2b14811b3c35d3f4ee7fbf6cf092e5c5998cbb2e24bc054a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-02-13T00:40:59Z","title_canon_sha256":"4eb5887d94af6de2b0b3441d5d93e27450fbcc05fafbeafdee872a7cc09b17a7"},"schema_version":"1.0","source":{"id":"1702.03600","kind":"arxiv","version":1}},"canonical_sha256":"aad6618af9e3094531032861cb46117c0e0605c03620694c8fe5df7a41bfb866","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aad6618af9e3094531032861cb46117c0e0605c03620694c8fe5df7a41bfb866","first_computed_at":"2026-05-18T00:50:53.418076Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:53.418076Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5TwGHQe86VDv/Sa4xMRHjI2yDQI4epWPAc2X4sltY80LW03Jmp1kb+EQeiCQkUZUacEwgaDC74djhOzcuC1sAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:53.418599Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.03600","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:05f273188156d8bc5cf4d7d4663fe576ef8b7651107ed178991beb66bb12c848","sha256:4fdea6c817069e39fdcdd5760eba6ee9fb94b8dd5dab8b6fa26675eb96a1f868"],"state_sha256":"84665698a848b8f8aa1f4f0d1bc68cdcb4c335142190eadbb939f0f976003301"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xbgiMZIP8QN6pzU5LHu0aMRIZvcnUxLXA+asEinqo7CGnoixxgbvSPBjj7cT+6ICf6/ZWksRPVNqffEWN3oSBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T19:08:15.679697Z","bundle_sha256":"162296b83c7d349504f16b2b30d8af78a9730195080f0a0392d1ea2556e844b5"}}