{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:P3WBJRNRH5ZPSNAJEPMYJ4SK62","short_pith_number":"pith:P3WBJRNR","canonical_record":{"source":{"id":"1907.10471","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-07-22T16:20:44Z","cross_cats_sorted":[],"title_canon_sha256":"9ae8657aff66c855ab652419c1c04b325adfbbf90dc0f2dd19f2af39563075fa","abstract_canon_sha256":"8455f426b5af42acf95e68323b83763bfdde1ffc3d1e7b72a7564ef381ba6f4c"},"schema_version":"1.0"},"canonical_sha256":"7eec14c5b13f72f9340923d984f24af6b6a55ce805c3a0eb1c3f96ff8e9452f5","source":{"kind":"arxiv","id":"1907.10471","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.10471","created_at":"2026-05-17T23:39:37Z"},{"alias_kind":"arxiv_version","alias_value":"1907.10471v1","created_at":"2026-05-17T23:39:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.10471","created_at":"2026-05-17T23:39:37Z"},{"alias_kind":"pith_short_12","alias_value":"P3WBJRNRH5ZP","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"P3WBJRNRH5ZPSNAJ","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"P3WBJRNR","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:P3WBJRNRH5ZPSNAJEPMYJ4SK62","target":"record","payload":{"canonical_record":{"source":{"id":"1907.10471","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-07-22T16:20:44Z","cross_cats_sorted":[],"title_canon_sha256":"9ae8657aff66c855ab652419c1c04b325adfbbf90dc0f2dd19f2af39563075fa","abstract_canon_sha256":"8455f426b5af42acf95e68323b83763bfdde1ffc3d1e7b72a7564ef381ba6f4c"},"schema_version":"1.0"},"canonical_sha256":"7eec14c5b13f72f9340923d984f24af6b6a55ce805c3a0eb1c3f96ff8e9452f5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:39:37.835498Z","signature_b64":"+lrtc6wng4olU8WNT6izuHzFqypJjGGGrndHGDpQ4Qo7GSyD8Jc9+FW/vr1WJCUsDCJkf9s7qNHfz5Cmf1v/DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7eec14c5b13f72f9340923d984f24af6b6a55ce805c3a0eb1c3f96ff8e9452f5","last_reissued_at":"2026-05-17T23:39:37.835065Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:39:37.835065Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.10471","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":"2026-05-17T23:39:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M0SILr2OuYFkArCJYOOasb7cjsMqpuMn3gtLIKg9bOKyX0F7OehfH6bDN0Z4KMum/inxa/vUfqFrgqaiT9rNDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T07:24:23.429071Z"},"content_sha256":"fc49904ad9dcf55b85e17f6aefe84452660a351488eb6bc1754393b2705d3ae8","schema_version":"1.0","event_id":"sha256:fc49904ad9dcf55b85e17f6aefe84452660a351488eb6bc1754393b2705d3ae8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:P3WBJRNRH5ZPSNAJEPMYJ4SK62","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"STD: Sparse-to-Dense 3D Object Detector for Point Cloud","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Jiaya Jia, Shu Liu, Xiaoyong Shen, Yanan Sun, Zetong Yang","submitted_at":"2019-07-22T16:20:44Z","abstract_excerpt":"We present a new two-stage 3D object detection framework, named sparse-to-dense 3D Object Detector (STD). The first stage is a bottom-up proposal generation network that uses raw point cloud as input to generate accurate proposals by seeding each point with a new spherical anchor. It achieves a high recall with less computation compared with prior works. Then, PointsPool is applied for generating proposal features by transforming their interior point features from sparse expression to compact representation, which saves even more computation time. In box prediction, which is the second stage, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.10471","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":"2026-05-17T23:39:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HFLMuSSSLHG+j/+xorHBhhHhBmCiJak6xthAgE1nYe8Jpgxc/MTwS6Ir7gmNDnvQXhHCuR+U96Nkd83yWPiTCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T07:24:23.429477Z"},"content_sha256":"ca332cc24e7627056a59b9c34537a3e63f27c5c0d0f30f9d5c635de417d8ddf4","schema_version":"1.0","event_id":"sha256:ca332cc24e7627056a59b9c34537a3e63f27c5c0d0f30f9d5c635de417d8ddf4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P3WBJRNRH5ZPSNAJEPMYJ4SK62/bundle.json","state_url":"https://pith.science/pith/P3WBJRNRH5ZPSNAJEPMYJ4SK62/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P3WBJRNRH5ZPSNAJEPMYJ4SK62/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":"2026-07-04T07:24:23Z","links":{"resolver":"https://pith.science/pith/P3WBJRNRH5ZPSNAJEPMYJ4SK62","bundle":"https://pith.science/pith/P3WBJRNRH5ZPSNAJEPMYJ4SK62/bundle.json","state":"https://pith.science/pith/P3WBJRNRH5ZPSNAJEPMYJ4SK62/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P3WBJRNRH5ZPSNAJEPMYJ4SK62/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:P3WBJRNRH5ZPSNAJEPMYJ4SK62","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":"8455f426b5af42acf95e68323b83763bfdde1ffc3d1e7b72a7564ef381ba6f4c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-07-22T16:20:44Z","title_canon_sha256":"9ae8657aff66c855ab652419c1c04b325adfbbf90dc0f2dd19f2af39563075fa"},"schema_version":"1.0","source":{"id":"1907.10471","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.10471","created_at":"2026-05-17T23:39:37Z"},{"alias_kind":"arxiv_version","alias_value":"1907.10471v1","created_at":"2026-05-17T23:39:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.10471","created_at":"2026-05-17T23:39:37Z"},{"alias_kind":"pith_short_12","alias_value":"P3WBJRNRH5ZP","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"P3WBJRNRH5ZPSNAJ","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"P3WBJRNR","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:ca332cc24e7627056a59b9c34537a3e63f27c5c0d0f30f9d5c635de417d8ddf4","target":"graph","created_at":"2026-05-17T23:39:37Z","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":"We present a new two-stage 3D object detection framework, named sparse-to-dense 3D Object Detector (STD). The first stage is a bottom-up proposal generation network that uses raw point cloud as input to generate accurate proposals by seeding each point with a new spherical anchor. It achieves a high recall with less computation compared with prior works. Then, PointsPool is applied for generating proposal features by transforming their interior point features from sparse expression to compact representation, which saves even more computation time. In box prediction, which is the second stage, ","authors_text":"Jiaya Jia, Shu Liu, Xiaoyong Shen, Yanan Sun, Zetong Yang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-07-22T16:20:44Z","title":"STD: Sparse-to-Dense 3D Object Detector for Point Cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.10471","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:fc49904ad9dcf55b85e17f6aefe84452660a351488eb6bc1754393b2705d3ae8","target":"record","created_at":"2026-05-17T23:39:37Z","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":"8455f426b5af42acf95e68323b83763bfdde1ffc3d1e7b72a7564ef381ba6f4c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-07-22T16:20:44Z","title_canon_sha256":"9ae8657aff66c855ab652419c1c04b325adfbbf90dc0f2dd19f2af39563075fa"},"schema_version":"1.0","source":{"id":"1907.10471","kind":"arxiv","version":1}},"canonical_sha256":"7eec14c5b13f72f9340923d984f24af6b6a55ce805c3a0eb1c3f96ff8e9452f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7eec14c5b13f72f9340923d984f24af6b6a55ce805c3a0eb1c3f96ff8e9452f5","first_computed_at":"2026-05-17T23:39:37.835065Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:37.835065Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+lrtc6wng4olU8WNT6izuHzFqypJjGGGrndHGDpQ4Qo7GSyD8Jc9+FW/vr1WJCUsDCJkf9s7qNHfz5Cmf1v/DQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:37.835498Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.10471","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc49904ad9dcf55b85e17f6aefe84452660a351488eb6bc1754393b2705d3ae8","sha256:ca332cc24e7627056a59b9c34537a3e63f27c5c0d0f30f9d5c635de417d8ddf4"],"state_sha256":"2c1c0e3a818a13c7a625f99b74145829a5adee99411826456e994d706c33a6e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+og0kS9k60YoPv8anAz+g8HeJmwud9a7ahBbPV2kb3yRrpLpxUUUECzDQerqTQD4wfhd4WldrJ2BxLMiUQNPAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T07:24:23.431477Z","bundle_sha256":"c83adff30cd4abcb1a7a1b52b8e2d2071721623d49089a154c18cf972653740b"}}