{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:YXDY2WUMEQSDFTXHJOPCPMLM2P","short_pith_number":"pith:YXDY2WUM","canonical_record":{"source":{"id":"2109.10187","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-09-21T14:13:36Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"ebd046d9d924452dd6ffebec5ecbe34d56bee753fc3533ff570d351c2c54a9c4","abstract_canon_sha256":"223e942cfd41cf43fb2128098daaf3a58fe293c9878a7082ac678ba74423cc05"},"schema_version":"1.0"},"canonical_sha256":"c5c78d5a8c242432cee74b9e27b16cd3e2ecf47a6e4ead8f06938d5981a7badb","source":{"kind":"arxiv","id":"2109.10187","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.10187","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"arxiv_version","alias_value":"2109.10187v5","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.10187","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"pith_short_12","alias_value":"YXDY2WUMEQSD","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"YXDY2WUMEQSDFTXH","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"YXDY2WUM","created_at":"2026-07-05T03:29:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:YXDY2WUMEQSDFTXHJOPCPMLM2P","target":"record","payload":{"canonical_record":{"source":{"id":"2109.10187","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-09-21T14:13:36Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"ebd046d9d924452dd6ffebec5ecbe34d56bee753fc3533ff570d351c2c54a9c4","abstract_canon_sha256":"223e942cfd41cf43fb2128098daaf3a58fe293c9878a7082ac678ba74423cc05"},"schema_version":"1.0"},"canonical_sha256":"c5c78d5a8c242432cee74b9e27b16cd3e2ecf47a6e4ead8f06938d5981a7badb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:29:52.284416Z","signature_b64":"Hse1lMsrq7y/bHEDGhxmvRjLiCaD6o8gGuO+SuANR6yr1MSadTw1S4Ou8KNoq31+lXE+m47LxKyc0qfCgLpeAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c5c78d5a8c242432cee74b9e27b16cd3e2ecf47a6e4ead8f06938d5981a7badb","last_reissued_at":"2026-07-05T03:29:52.284012Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:29:52.284012Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.10187","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:29:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/0x9NaJruapFY5eGomPz9C1c3LAhT5WjTwmxyzu4H4jkHrqLiv09DFBm5bvFoX27LE4mB/xmJhlHGdoDc32sBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T14:10:10.755852Z"},"content_sha256":"f2a1f0c6a00be61cade39499c480693277c5e1518a5b8ea62819b52e8b766b4e","schema_version":"1.0","event_id":"sha256:f2a1f0c6a00be61cade39499c480693277c5e1518a5b8ea62819b52e8b766b4e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:YXDY2WUMEQSDFTXHJOPCPMLM2P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Oriented Object Detection in Aerial Images Based on Area Ratio of Parallelogram","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.CV","authors_text":"Jiangping Lu, Linlin Ou, Mi Lin, Xinyi Yu","submitted_at":"2021-09-21T14:13:36Z","abstract_excerpt":"Oriented object detection is a challenging task in aerial images since the objects in aerial images are displayed in arbitrary directions and are frequently densely packed. The mainstream detectors describe rotating objects using a five-parament or eight-parament representations, which suffer from representation ambiguity for orientated object definition. In this paper, we propose a novel representation method based on area ratio of parallelogram, called ARP. Specifically, ARP regresses the minimum bounding rectangle of the oriented object and three area ratios. Three area ratios include the a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.10187","kind":"arxiv","version":5},"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/2109.10187/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":"2026-07-05T03:29:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R6lzSBZdetszQfnfLwrJd3QS0NF29vZ/c2uKmXLvZp5VPHRFr6Qn8dJCQJ11QaHLGuuUtVmp0bKxU5OCHDhuAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T14:10:10.756636Z"},"content_sha256":"6731469ce3ad19644dd6baaf18e11bf91ee4ffe0207484afcb65c943350c38c8","schema_version":"1.0","event_id":"sha256:6731469ce3ad19644dd6baaf18e11bf91ee4ffe0207484afcb65c943350c38c8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YXDY2WUMEQSDFTXHJOPCPMLM2P/bundle.json","state_url":"https://pith.science/pith/YXDY2WUMEQSDFTXHJOPCPMLM2P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YXDY2WUMEQSDFTXHJOPCPMLM2P/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":"2026-08-18T14:10:10Z","links":{"resolver":"https://pith.science/pith/YXDY2WUMEQSDFTXHJOPCPMLM2P","bundle":"https://pith.science/pith/YXDY2WUMEQSDFTXHJOPCPMLM2P/bundle.json","state":"https://pith.science/pith/YXDY2WUMEQSDFTXHJOPCPMLM2P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YXDY2WUMEQSDFTXHJOPCPMLM2P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:YXDY2WUMEQSDFTXHJOPCPMLM2P","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":"223e942cfd41cf43fb2128098daaf3a58fe293c9878a7082ac678ba74423cc05","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-09-21T14:13:36Z","title_canon_sha256":"ebd046d9d924452dd6ffebec5ecbe34d56bee753fc3533ff570d351c2c54a9c4"},"schema_version":"1.0","source":{"id":"2109.10187","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.10187","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"arxiv_version","alias_value":"2109.10187v5","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.10187","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"pith_short_12","alias_value":"YXDY2WUMEQSD","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"YXDY2WUMEQSDFTXH","created_at":"2026-07-05T03:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"YXDY2WUM","created_at":"2026-07-05T03:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:6731469ce3ad19644dd6baaf18e11bf91ee4ffe0207484afcb65c943350c38c8","target":"graph","created_at":"2026-07-05T03:29:52Z","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/2109.10187/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Oriented object detection is a challenging task in aerial images since the objects in aerial images are displayed in arbitrary directions and are frequently densely packed. The mainstream detectors describe rotating objects using a five-parament or eight-parament representations, which suffer from representation ambiguity for orientated object definition. In this paper, we propose a novel representation method based on area ratio of parallelogram, called ARP. Specifically, ARP regresses the minimum bounding rectangle of the oriented object and three area ratios. Three area ratios include the a","authors_text":"Jiangping Lu, Linlin Ou, Mi Lin, Xinyi Yu","cross_cats":["cs.AI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-09-21T14:13:36Z","title":"Oriented Object Detection in Aerial Images Based on Area Ratio of Parallelogram"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.10187","kind":"arxiv","version":5},"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:f2a1f0c6a00be61cade39499c480693277c5e1518a5b8ea62819b52e8b766b4e","target":"record","created_at":"2026-07-05T03:29:52Z","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":"223e942cfd41cf43fb2128098daaf3a58fe293c9878a7082ac678ba74423cc05","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2021-09-21T14:13:36Z","title_canon_sha256":"ebd046d9d924452dd6ffebec5ecbe34d56bee753fc3533ff570d351c2c54a9c4"},"schema_version":"1.0","source":{"id":"2109.10187","kind":"arxiv","version":5}},"canonical_sha256":"c5c78d5a8c242432cee74b9e27b16cd3e2ecf47a6e4ead8f06938d5981a7badb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c5c78d5a8c242432cee74b9e27b16cd3e2ecf47a6e4ead8f06938d5981a7badb","first_computed_at":"2026-07-05T03:29:52.284012Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:29:52.284012Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hse1lMsrq7y/bHEDGhxmvRjLiCaD6o8gGuO+SuANR6yr1MSadTw1S4Ou8KNoq31+lXE+m47LxKyc0qfCgLpeAw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:29:52.284416Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.10187","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f2a1f0c6a00be61cade39499c480693277c5e1518a5b8ea62819b52e8b766b4e","sha256:6731469ce3ad19644dd6baaf18e11bf91ee4ffe0207484afcb65c943350c38c8"],"state_sha256":"909b08dd191e04dbf0e33fd86f02be6d64809ea5a694195beb0a1bb10d7445c2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xdZRlAwY05v7Z+OZbFSKv4oP63SDYxqznrqgfQPemRlklnlIn93QHMdE1fzx+1BdeKu7KhIwhu6jwM8z7QYUAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T14:10:10.772784Z","bundle_sha256":"ae1fd6e0f35e3b2fc0d42f65c0b95e27e11553d249f863c2a01896494afe572b"}}