{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ID3JDOCSFFDDJV6PMP2557GJUY","short_pith_number":"pith:ID3JDOCS","canonical_record":{"source":{"id":"1904.00537","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-04-01T02:14:25Z","cross_cats_sorted":[],"title_canon_sha256":"81f9aeb95a650bcfbf8a54792fe52700f6a22586ff3fd2dc11c347810a41dc3a","abstract_canon_sha256":"1cb872f71c870ac3d1befd52b1b0c272d62c31880aab0f331da8cbd509407e04"},"schema_version":"1.0"},"canonical_sha256":"40f691b852294634d7cf63f5defcc9a6075f65466c53d0433a14417c460c30d3","source":{"kind":"arxiv","id":"1904.00537","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.00537","created_at":"2026-05-17T23:49:48Z"},{"alias_kind":"arxiv_version","alias_value":"1904.00537v1","created_at":"2026-05-17T23:49:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.00537","created_at":"2026-05-17T23:49:48Z"},{"alias_kind":"pith_short_12","alias_value":"ID3JDOCSFFDD","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"ID3JDOCSFFDDJV6P","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"ID3JDOCS","created_at":"2026-05-18T12:33:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ID3JDOCSFFDDJV6PMP2557GJUY","target":"record","payload":{"canonical_record":{"source":{"id":"1904.00537","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-04-01T02:14:25Z","cross_cats_sorted":[],"title_canon_sha256":"81f9aeb95a650bcfbf8a54792fe52700f6a22586ff3fd2dc11c347810a41dc3a","abstract_canon_sha256":"1cb872f71c870ac3d1befd52b1b0c272d62c31880aab0f331da8cbd509407e04"},"schema_version":"1.0"},"canonical_sha256":"40f691b852294634d7cf63f5defcc9a6075f65466c53d0433a14417c460c30d3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:48.167346Z","signature_b64":"fOk7tR6wgSyW0CVYRM0xTDJb9AaT4j6edj8BALlAA+drCFVWypn+D5WEyPqqPWXiI7Vq7URpGemIKhHoljM8Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"40f691b852294634d7cf63f5defcc9a6075f65466c53d0433a14417c460c30d3","last_reissued_at":"2026-05-17T23:49:48.166668Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:48.166668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.00537","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":"2026-05-17T23:49:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k4rBezHbfuqk9uuP2E48Jkh2Zk5N+EJgWNM1iMJV0oCXqBdFdAtJbKW27rsEX3HQs61gSdvVxcmGsSJLHPpADw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:21:18.176734Z"},"content_sha256":"7364a779a2ac5d8c646a5e59d13f59a90670408df5a78062efe0a36e9db912ff","schema_version":"1.0","event_id":"sha256:7364a779a2ac5d8c646a5e59d13f59a90670408df5a78062efe0a36e9db912ff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ID3JDOCSFFDDJV6PMP2557GJUY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Perceive Where to Focus: Learning Visibility-aware Part-level Features for Partial Person Re-identification","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Chi Zhang, Jian Sun, Qin Xu, Shengjin Wang, Yali Li, Yifan Sun, Yikang Li","submitted_at":"2019-04-01T02:14:25Z","abstract_excerpt":"This paper considers a realistic problem in person re-identification (re-ID) task, i.e., partial re-ID. Under partial re-ID scenario, the images may contain a partial observation of a pedestrian. If we directly compare a partial pedestrian image with a holistic one, the extreme spatial misalignment significantly compromises the discriminative ability of the learned representation. We propose a Visibility-aware Part Model (VPM), which learns to perceive the visibility of regions through self-supervision. The visibility awareness allows VPM to extract region-level features and compare two images"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.00537","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":"2026-05-17T23:49:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jr2NysaM0XY+xVRd0Cug3xMkrNYOvnDPpEJGiAPDBD/XcBC03gsur9AAjtIKjyF8zBwk1iciMvKF3FGjvt4vBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:21:18.177080Z"},"content_sha256":"49c5f6389b3975257891c50f5c0654c5d89cbba812b1570a1d670b355536133c","schema_version":"1.0","event_id":"sha256:49c5f6389b3975257891c50f5c0654c5d89cbba812b1570a1d670b355536133c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ID3JDOCSFFDDJV6PMP2557GJUY/bundle.json","state_url":"https://pith.science/pith/ID3JDOCSFFDDJV6PMP2557GJUY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ID3JDOCSFFDDJV6PMP2557GJUY/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":"2026-05-30T07:21:18Z","links":{"resolver":"https://pith.science/pith/ID3JDOCSFFDDJV6PMP2557GJUY","bundle":"https://pith.science/pith/ID3JDOCSFFDDJV6PMP2557GJUY/bundle.json","state":"https://pith.science/pith/ID3JDOCSFFDDJV6PMP2557GJUY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ID3JDOCSFFDDJV6PMP2557GJUY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ID3JDOCSFFDDJV6PMP2557GJUY","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":"1cb872f71c870ac3d1befd52b1b0c272d62c31880aab0f331da8cbd509407e04","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-04-01T02:14:25Z","title_canon_sha256":"81f9aeb95a650bcfbf8a54792fe52700f6a22586ff3fd2dc11c347810a41dc3a"},"schema_version":"1.0","source":{"id":"1904.00537","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.00537","created_at":"2026-05-17T23:49:48Z"},{"alias_kind":"arxiv_version","alias_value":"1904.00537v1","created_at":"2026-05-17T23:49:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.00537","created_at":"2026-05-17T23:49:48Z"},{"alias_kind":"pith_short_12","alias_value":"ID3JDOCSFFDD","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"ID3JDOCSFFDDJV6P","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"ID3JDOCS","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:49c5f6389b3975257891c50f5c0654c5d89cbba812b1570a1d670b355536133c","target":"graph","created_at":"2026-05-17T23:49:48Z","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":"This paper considers a realistic problem in person re-identification (re-ID) task, i.e., partial re-ID. Under partial re-ID scenario, the images may contain a partial observation of a pedestrian. If we directly compare a partial pedestrian image with a holistic one, the extreme spatial misalignment significantly compromises the discriminative ability of the learned representation. We propose a Visibility-aware Part Model (VPM), which learns to perceive the visibility of regions through self-supervision. The visibility awareness allows VPM to extract region-level features and compare two images","authors_text":"Chi Zhang, Jian Sun, Qin Xu, Shengjin Wang, Yali Li, Yifan Sun, Yikang Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-04-01T02:14:25Z","title":"Perceive Where to Focus: Learning Visibility-aware Part-level Features for Partial Person Re-identification"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.00537","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":"sha256:7364a779a2ac5d8c646a5e59d13f59a90670408df5a78062efe0a36e9db912ff","target":"record","created_at":"2026-05-17T23:49:48Z","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":"1cb872f71c870ac3d1befd52b1b0c272d62c31880aab0f331da8cbd509407e04","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-04-01T02:14:25Z","title_canon_sha256":"81f9aeb95a650bcfbf8a54792fe52700f6a22586ff3fd2dc11c347810a41dc3a"},"schema_version":"1.0","source":{"id":"1904.00537","kind":"arxiv","version":1}},"canonical_sha256":"40f691b852294634d7cf63f5defcc9a6075f65466c53d0433a14417c460c30d3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"40f691b852294634d7cf63f5defcc9a6075f65466c53d0433a14417c460c30d3","first_computed_at":"2026-05-17T23:49:48.166668Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:48.166668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fOk7tR6wgSyW0CVYRM0xTDJb9AaT4j6edj8BALlAA+drCFVWypn+D5WEyPqqPWXiI7Vq7URpGemIKhHoljM8Ag==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:48.167346Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.00537","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7364a779a2ac5d8c646a5e59d13f59a90670408df5a78062efe0a36e9db912ff","sha256:49c5f6389b3975257891c50f5c0654c5d89cbba812b1570a1d670b355536133c"],"state_sha256":"70dd52b26d69b8bca05d5374814025efe027c950d2141cffa5695e1b408fa543"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Swo0EatnxOTJ65uN5qq/Kn7oWJ0V+EfVkBVDE/7dEws1dzQxcv+2UBTFvwWs+d73MEj2hRL4BTwjr2omcYMEBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T07:21:18.179174Z","bundle_sha256":"24397d4403c27d5b3997c673d8a5e8335bc1a7615cacefb247a2169ea71b465f"}}