{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:WGULPWBIASZBYITLTLHYQJSRYQ","short_pith_number":"pith:WGULPWBI","canonical_record":{"source":{"id":"2104.02230","kind":"arxiv","version":6},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-04-06T01:45:07Z","cross_cats_sorted":[],"title_canon_sha256":"674158540ad7adfed558dc0ec864ad6f8ebeecd63fb0cfdb29647353cdb24adc","abstract_canon_sha256":"2064a957ffdf4ee71ce83ea835899fd562b4afb242bf38c2ddf8ce33f8f1198f"},"schema_version":"1.0"},"canonical_sha256":"b1a8b7d82804b21c226b9acf882651c436c476dec70388d81038b1a9828b5010","source":{"kind":"arxiv","id":"2104.02230","version":6},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.02230","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"arxiv_version","alias_value":"2104.02230v6","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.02230","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"pith_short_12","alias_value":"WGULPWBIASZB","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"pith_short_16","alias_value":"WGULPWBIASZBYITL","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"pith_short_8","alias_value":"WGULPWBI","created_at":"2026-07-05T05:33:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:WGULPWBIASZBYITLTLHYQJSRYQ","target":"record","payload":{"canonical_record":{"source":{"id":"2104.02230","kind":"arxiv","version":6},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-04-06T01:45:07Z","cross_cats_sorted":[],"title_canon_sha256":"674158540ad7adfed558dc0ec864ad6f8ebeecd63fb0cfdb29647353cdb24adc","abstract_canon_sha256":"2064a957ffdf4ee71ce83ea835899fd562b4afb242bf38c2ddf8ce33f8f1198f"},"schema_version":"1.0"},"canonical_sha256":"b1a8b7d82804b21c226b9acf882651c436c476dec70388d81038b1a9828b5010","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:33:58.333402Z","signature_b64":"qoa4d1adoCKTaka6hzJcGpyCHy5Br/joW15mM5pcUPMnmyRHueifl1ErQEDoRg5eoPAoG1r56C8tsgIXpuLoCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b1a8b7d82804b21c226b9acf882651c436c476dec70388d81038b1a9828b5010","last_reissued_at":"2026-07-05T05:33:58.332949Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:33:58.332949Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.02230","source_version":6,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:33:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ky5I1IufkVNjCNspVL4sUkUDgVYp3v7FitJXEjineS1KtkI/ilQEeZK443qjbdcxH6RxbmqpJ1+Z8PJ5BytRDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T03:55:35.977542Z"},"content_sha256":"531659ba18eedffef7899e661705fa5aa9cd5510a7db24ccf88443503d2f63a2","schema_version":"1.0","event_id":"sha256:531659ba18eedffef7899e661705fa5aa9cd5510a7db24ccf88443503d2f63a2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:WGULPWBIASZBYITLTLHYQJSRYQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Achieving Domain Generalization in Underwater Object Detection by Domain Mixup and Contrastive Learning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Hong Liu, Linhui Dai, Pinhao Song, Runwei Ding, Shengquan Li, Xiaochuan Zhang, Yang Chen","submitted_at":"2021-04-06T01:45:07Z","abstract_excerpt":"The performance of existing underwater object detection methods degrades seriously when facing domain shift caused by complicated underwater environments. Due to the limitation of the number of domains in the dataset, deep detectors easily memorize a few seen domains, which leads to low generalization ability. There are two common ideas to improve the domain generalization performance. First, it can be inferred that the detector trained on as many domains as possible is domain-invariant. Second, for the images with the same semantic content in different domains, their hidden features should be"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.02230","kind":"arxiv","version":6},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2104.02230/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T05:33:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0etwFS3SOs3AdStVvFVQiSQIveXn612OvHNxGfqMvn8bgJavpM0omLLRIG587W2CXDhcRv+BtNSS8+jpTnYnCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T03:55:35.977922Z"},"content_sha256":"f0e6f4650cfe61902a53613695f3b88119010d27dc830ce77e8d9fee18970667","schema_version":"1.0","event_id":"sha256:f0e6f4650cfe61902a53613695f3b88119010d27dc830ce77e8d9fee18970667"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WGULPWBIASZBYITLTLHYQJSRYQ/bundle.json","state_url":"https://pith.science/pith/WGULPWBIASZBYITLTLHYQJSRYQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WGULPWBIASZBYITLTLHYQJSRYQ/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":"2026-07-07T03:55:35Z","links":{"resolver":"https://pith.science/pith/WGULPWBIASZBYITLTLHYQJSRYQ","bundle":"https://pith.science/pith/WGULPWBIASZBYITLTLHYQJSRYQ/bundle.json","state":"https://pith.science/pith/WGULPWBIASZBYITLTLHYQJSRYQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WGULPWBIASZBYITLTLHYQJSRYQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:WGULPWBIASZBYITLTLHYQJSRYQ","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":"2064a957ffdf4ee71ce83ea835899fd562b4afb242bf38c2ddf8ce33f8f1198f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-04-06T01:45:07Z","title_canon_sha256":"674158540ad7adfed558dc0ec864ad6f8ebeecd63fb0cfdb29647353cdb24adc"},"schema_version":"1.0","source":{"id":"2104.02230","kind":"arxiv","version":6}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.02230","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"arxiv_version","alias_value":"2104.02230v6","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.02230","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"pith_short_12","alias_value":"WGULPWBIASZB","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"pith_short_16","alias_value":"WGULPWBIASZBYITL","created_at":"2026-07-05T05:33:58Z"},{"alias_kind":"pith_short_8","alias_value":"WGULPWBI","created_at":"2026-07-05T05:33:58Z"}],"graph_snapshots":[{"event_id":"sha256:f0e6f4650cfe61902a53613695f3b88119010d27dc830ce77e8d9fee18970667","target":"graph","created_at":"2026-07-05T05:33:58Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2104.02230/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The performance of existing underwater object detection methods degrades seriously when facing domain shift caused by complicated underwater environments. Due to the limitation of the number of domains in the dataset, deep detectors easily memorize a few seen domains, which leads to low generalization ability. There are two common ideas to improve the domain generalization performance. First, it can be inferred that the detector trained on as many domains as possible is domain-invariant. Second, for the images with the same semantic content in different domains, their hidden features should be","authors_text":"Hong Liu, Linhui Dai, Pinhao Song, Runwei Ding, Shengquan Li, Xiaochuan Zhang, Yang Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-04-06T01:45:07Z","title":"Achieving Domain Generalization in Underwater Object Detection by Domain Mixup and Contrastive Learning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.02230","kind":"arxiv","version":6},"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":"sha256:531659ba18eedffef7899e661705fa5aa9cd5510a7db24ccf88443503d2f63a2","target":"record","created_at":"2026-07-05T05:33:58Z","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":"2064a957ffdf4ee71ce83ea835899fd562b4afb242bf38c2ddf8ce33f8f1198f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-04-06T01:45:07Z","title_canon_sha256":"674158540ad7adfed558dc0ec864ad6f8ebeecd63fb0cfdb29647353cdb24adc"},"schema_version":"1.0","source":{"id":"2104.02230","kind":"arxiv","version":6}},"canonical_sha256":"b1a8b7d82804b21c226b9acf882651c436c476dec70388d81038b1a9828b5010","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b1a8b7d82804b21c226b9acf882651c436c476dec70388d81038b1a9828b5010","first_computed_at":"2026-07-05T05:33:58.332949Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:33:58.332949Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qoa4d1adoCKTaka6hzJcGpyCHy5Br/joW15mM5pcUPMnmyRHueifl1ErQEDoRg5eoPAoG1r56C8tsgIXpuLoCg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:33:58.333402Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.02230","source_kind":"arxiv","source_version":6}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:531659ba18eedffef7899e661705fa5aa9cd5510a7db24ccf88443503d2f63a2","sha256:f0e6f4650cfe61902a53613695f3b88119010d27dc830ce77e8d9fee18970667"],"state_sha256":"d6204f063c2ade26b5b54287623a53b53c18c50ba6583329b09ddfa45e7379fc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oaYSPSel2kOp7xrjpDhlcQxhzC2uHVbVk26PElbqjfBjcu5yHsctX64umE5GUa/tiUj6nziTgxrTc8zsa/XvDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T03:55:35.979851Z","bundle_sha256":"17cc2ce9570e9f85e1b4935641407ca42a50bdbf4b9531f401ef892dd9da4828"}}