{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:IMQEO4JT22V4QTZAORXFJYSOCD","short_pith_number":"pith:IMQEO4JT","canonical_record":{"source":{"id":"2303.04027","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2023-03-07T16:39:09Z","cross_cats_sorted":["cs.RO"],"title_canon_sha256":"d4c9095618f50df5cfe8a5d3d9470a712b59e55d6ea1c107024e207ad4152e8e","abstract_canon_sha256":"82688c4a1af47f97489745bc0e2f5e839a1590fad3cf0ea08a652a13df42728a"},"schema_version":"1.0"},"canonical_sha256":"4320477133d6abc84f20746e54e24e10ce8d99dc8858f2f9b1d17797f8249c82","source":{"kind":"arxiv","id":"2303.04027","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.04027","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"2303.04027v2","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.04027","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"IMQEO4JT22V4","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"pith_short_16","alias_value":"IMQEO4JT22V4QTZA","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"pith_short_8","alias_value":"IMQEO4JT","created_at":"2026-07-05T05:49:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:IMQEO4JT22V4QTZAORXFJYSOCD","target":"record","payload":{"canonical_record":{"source":{"id":"2303.04027","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2023-03-07T16:39:09Z","cross_cats_sorted":["cs.RO"],"title_canon_sha256":"d4c9095618f50df5cfe8a5d3d9470a712b59e55d6ea1c107024e207ad4152e8e","abstract_canon_sha256":"82688c4a1af47f97489745bc0e2f5e839a1590fad3cf0ea08a652a13df42728a"},"schema_version":"1.0"},"canonical_sha256":"4320477133d6abc84f20746e54e24e10ce8d99dc8858f2f9b1d17797f8249c82","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:49:33.954338Z","signature_b64":"PeLg9h+Qfkg1f5kCbalHIxBmmubvOIQsWkfs+Jc+NUu5GFAi9DevXpEPj+mMPpWpr/EHbdUfaBMKJnHSBHAqCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4320477133d6abc84f20746e54e24e10ce8d99dc8858f2f9b1d17797f8249c82","last_reissued_at":"2026-07-05T05:49:33.953972Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:49:33.953972Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.04027","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:49:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Tl64Ucr+D0btq8EwEORPASxu79m7Yx9hKsLMpLgm1jUnzOuGh2U8fFxzmLJvQ9yT4MKl3i9iV8SlXoetJRkLDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T10:36:11.824152Z"},"content_sha256":"3b00e4ad0f32226f3c407c6a73a3a3a1e914633ff6159d284b65d51808648f11","schema_version":"1.0","event_id":"sha256:3b00e4ad0f32226f3c407c6a73a3a3a1e914633ff6159d284b65d51808648f11"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:IMQEO4JT22V4QTZAORXFJYSOCD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"BIRD-PCC: Bi-directional Range Image-based Deep LiDAR Point Cloud Compression","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.RO"],"primary_cat":"cs.MM","authors_text":"Chia-Sheng Liu, Hao Hsu, Hung-Ting Su, Jia-Fong Yeh, Ming-Sui Lee, Winston H. Hsu","submitted_at":"2023-03-07T16:39:09Z","abstract_excerpt":"The large amount of data collected by LiDAR sensors brings the issue of LiDAR point cloud compression (PCC). Previous works on LiDAR PCC have used range image representations and followed the predictive coding paradigm to create a basic prototype of a coding framework. However, their prediction methods give an inaccurate result due to the negligence of invalid pixels in range images and the omission of future frames in the time step. Moreover, their handcrafted design of residual coding methods could not fully exploit spatial redundancy. To remedy this, we propose a coding framework BIRD-PCC. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.04027","kind":"arxiv","version":2},"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/2303.04027/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":"2026-07-05T05:49:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uR2SwRB/lixfaAjmUi88Dru1Dn2kNeLLCKyGNLQTRG/46nYIXMdrz9IDA9N5+qqvfjhqYmkNAEk4EqCznoH5AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T10:36:11.824645Z"},"content_sha256":"25b81994e308c8597f26eaf2dc6eca3a8648659706992fca1167b1ab593aee10","schema_version":"1.0","event_id":"sha256:25b81994e308c8597f26eaf2dc6eca3a8648659706992fca1167b1ab593aee10"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IMQEO4JT22V4QTZAORXFJYSOCD/bundle.json","state_url":"https://pith.science/pith/IMQEO4JT22V4QTZAORXFJYSOCD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IMQEO4JT22V4QTZAORXFJYSOCD/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":"2026-08-05T10:36:11Z","links":{"resolver":"https://pith.science/pith/IMQEO4JT22V4QTZAORXFJYSOCD","bundle":"https://pith.science/pith/IMQEO4JT22V4QTZAORXFJYSOCD/bundle.json","state":"https://pith.science/pith/IMQEO4JT22V4QTZAORXFJYSOCD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IMQEO4JT22V4QTZAORXFJYSOCD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:IMQEO4JT22V4QTZAORXFJYSOCD","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":"82688c4a1af47f97489745bc0e2f5e839a1590fad3cf0ea08a652a13df42728a","cross_cats_sorted":["cs.RO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2023-03-07T16:39:09Z","title_canon_sha256":"d4c9095618f50df5cfe8a5d3d9470a712b59e55d6ea1c107024e207ad4152e8e"},"schema_version":"1.0","source":{"id":"2303.04027","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.04027","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"2303.04027v2","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.04027","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"IMQEO4JT22V4","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"pith_short_16","alias_value":"IMQEO4JT22V4QTZA","created_at":"2026-07-05T05:49:33Z"},{"alias_kind":"pith_short_8","alias_value":"IMQEO4JT","created_at":"2026-07-05T05:49:33Z"}],"graph_snapshots":[{"event_id":"sha256:25b81994e308c8597f26eaf2dc6eca3a8648659706992fca1167b1ab593aee10","target":"graph","created_at":"2026-07-05T05:49:33Z","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/2303.04027/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The large amount of data collected by LiDAR sensors brings the issue of LiDAR point cloud compression (PCC). Previous works on LiDAR PCC have used range image representations and followed the predictive coding paradigm to create a basic prototype of a coding framework. However, their prediction methods give an inaccurate result due to the negligence of invalid pixels in range images and the omission of future frames in the time step. Moreover, their handcrafted design of residual coding methods could not fully exploit spatial redundancy. To remedy this, we propose a coding framework BIRD-PCC. ","authors_text":"Chia-Sheng Liu, Hao Hsu, Hung-Ting Su, Jia-Fong Yeh, Ming-Sui Lee, Winston H. Hsu","cross_cats":["cs.RO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2023-03-07T16:39:09Z","title":"BIRD-PCC: Bi-directional Range Image-based Deep LiDAR Point Cloud Compression"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.04027","kind":"arxiv","version":2},"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":"sha256:3b00e4ad0f32226f3c407c6a73a3a3a1e914633ff6159d284b65d51808648f11","target":"record","created_at":"2026-07-05T05:49:33Z","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":"82688c4a1af47f97489745bc0e2f5e839a1590fad3cf0ea08a652a13df42728a","cross_cats_sorted":["cs.RO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2023-03-07T16:39:09Z","title_canon_sha256":"d4c9095618f50df5cfe8a5d3d9470a712b59e55d6ea1c107024e207ad4152e8e"},"schema_version":"1.0","source":{"id":"2303.04027","kind":"arxiv","version":2}},"canonical_sha256":"4320477133d6abc84f20746e54e24e10ce8d99dc8858f2f9b1d17797f8249c82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4320477133d6abc84f20746e54e24e10ce8d99dc8858f2f9b1d17797f8249c82","first_computed_at":"2026-07-05T05:49:33.953972Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:49:33.953972Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PeLg9h+Qfkg1f5kCbalHIxBmmubvOIQsWkfs+Jc+NUu5GFAi9DevXpEPj+mMPpWpr/EHbdUfaBMKJnHSBHAqCg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:49:33.954338Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.04027","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3b00e4ad0f32226f3c407c6a73a3a3a1e914633ff6159d284b65d51808648f11","sha256:25b81994e308c8597f26eaf2dc6eca3a8648659706992fca1167b1ab593aee10"],"state_sha256":"a3bd42d11e8bedbdf93c54f20a94f6286165cfc08c1e7d98cc757dc31cd3e1a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HNS7hvV3eU2plCWuCNLxU/qRhExoifpqqUbKnpyWzd9uq16YuNXbsSUak16gM2bDpPE0ji/UhvQ5dv9wT+G5BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T10:36:11.828965Z","bundle_sha256":"78ee27c2a4a5656b01af492400446712c487bf5c6201e1feb1b5c9aed98761c0"}}