{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:4RS5J4YTNQYGWCDO4FP6VOR2YG","short_pith_number":"pith:4RS5J4YT","canonical_record":{"source":{"id":"2103.06549","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-03-11T09:24:05Z","cross_cats_sorted":[],"title_canon_sha256":"c667f4c589866e841527c5cd1b499f4c42122a879ccb5bfb27d566a5ae1d2494","abstract_canon_sha256":"e051a8dfffdcdab927616db8d77605521e4c61a1a787942b619c61f84b68ed00"},"schema_version":"1.0"},"canonical_sha256":"e465d4f3136c306b086ee15feaba3ac1a45da4a77ee5476b1f4743d8892f69ab","source":{"kind":"arxiv","id":"2103.06549","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.06549","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"arxiv_version","alias_value":"2103.06549v1","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.06549","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"pith_short_12","alias_value":"4RS5J4YTNQYG","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"pith_short_16","alias_value":"4RS5J4YTNQYGWCDO","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"pith_short_8","alias_value":"4RS5J4YT","created_at":"2026-07-05T02:22:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:4RS5J4YTNQYGWCDO4FP6VOR2YG","target":"record","payload":{"canonical_record":{"source":{"id":"2103.06549","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-03-11T09:24:05Z","cross_cats_sorted":[],"title_canon_sha256":"c667f4c589866e841527c5cd1b499f4c42122a879ccb5bfb27d566a5ae1d2494","abstract_canon_sha256":"e051a8dfffdcdab927616db8d77605521e4c61a1a787942b619c61f84b68ed00"},"schema_version":"1.0"},"canonical_sha256":"e465d4f3136c306b086ee15feaba3ac1a45da4a77ee5476b1f4743d8892f69ab","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:22:10.404218Z","signature_b64":"Nf34rrS7L7eZQ6OZHzbnNsgNLgtmB0CVbz2jeVDaZvBx01Xm2rYxvCbKnOIyVbk5wn+0syA5eh3gsmD+Yvj6CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e465d4f3136c306b086ee15feaba3ac1a45da4a77ee5476b1f4743d8892f69ab","last_reissued_at":"2026-07-05T02:22:10.403801Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:22:10.403801Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.06549","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":"2026-07-05T02:22:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E5hPzGtXUn3DZUvIuQV1Wgkd5/X29P7T/baZDxXA69oZogbHqD2Y9m8xJCs4+iXc3LvCLoqUCi1VWr+B2MdQAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:40:02.403547Z"},"content_sha256":"0c9b283f1c602aa26752540d1339a17c47cb09def745d4d3a54c6c55741f3c82","schema_version":"1.0","event_id":"sha256:0c9b283f1c602aa26752540d1339a17c47cb09def745d4d3a54c6c55741f3c82"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:4RS5J4YTNQYGWCDO4FP6VOR2YG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Advanced Geometry Surface Coding for Dynamic Point Cloud Compression","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.IV","authors_text":"Hao Gao, Hongliang Li, Jian Xiong, King Ngi Ngan, Miaohui Wang, Weisi Lin","submitted_at":"2021-03-11T09:24:05Z","abstract_excerpt":"In video-based dynamic point cloud compression (V-PCC), 3D point clouds are projected onto 2D images for compressing with the existing video codecs. However, the existing video codecs are originally designed for natural visual signals, and it fails to account for the characteristics of point clouds. Thus, there are still problems in the compression of geometry information generated from the point clouds. Firstly, the distortion model in the existing rate-distortion optimization (RDO) is not consistent with the geometry quality assessment metrics. Secondly, the prediction methods in video codec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.06549","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2103.06549/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":"2026-07-05T02:22:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j12FcAqAyKlwGXLff86ks9bpGf8AJFQe3Pi7+i+e5S0AeK4zzYAM1HemFEKOqjDMbaCF6uFszdnQ6lqD+9d6Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:40:02.404076Z"},"content_sha256":"50511442792b482bc3b97864af314f511051abb12465ba890639a37d4659f51a","schema_version":"1.0","event_id":"sha256:50511442792b482bc3b97864af314f511051abb12465ba890639a37d4659f51a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4RS5J4YTNQYGWCDO4FP6VOR2YG/bundle.json","state_url":"https://pith.science/pith/4RS5J4YTNQYGWCDO4FP6VOR2YG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4RS5J4YTNQYGWCDO4FP6VOR2YG/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":"2026-08-04T22:40:02Z","links":{"resolver":"https://pith.science/pith/4RS5J4YTNQYGWCDO4FP6VOR2YG","bundle":"https://pith.science/pith/4RS5J4YTNQYGWCDO4FP6VOR2YG/bundle.json","state":"https://pith.science/pith/4RS5J4YTNQYGWCDO4FP6VOR2YG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4RS5J4YTNQYGWCDO4FP6VOR2YG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:4RS5J4YTNQYGWCDO4FP6VOR2YG","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":"e051a8dfffdcdab927616db8d77605521e4c61a1a787942b619c61f84b68ed00","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-03-11T09:24:05Z","title_canon_sha256":"c667f4c589866e841527c5cd1b499f4c42122a879ccb5bfb27d566a5ae1d2494"},"schema_version":"1.0","source":{"id":"2103.06549","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.06549","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"arxiv_version","alias_value":"2103.06549v1","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.06549","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"pith_short_12","alias_value":"4RS5J4YTNQYG","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"pith_short_16","alias_value":"4RS5J4YTNQYGWCDO","created_at":"2026-07-05T02:22:10Z"},{"alias_kind":"pith_short_8","alias_value":"4RS5J4YT","created_at":"2026-07-05T02:22:10Z"}],"graph_snapshots":[{"event_id":"sha256:50511442792b482bc3b97864af314f511051abb12465ba890639a37d4659f51a","target":"graph","created_at":"2026-07-05T02:22:10Z","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/2103.06549/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In video-based dynamic point cloud compression (V-PCC), 3D point clouds are projected onto 2D images for compressing with the existing video codecs. However, the existing video codecs are originally designed for natural visual signals, and it fails to account for the characteristics of point clouds. Thus, there are still problems in the compression of geometry information generated from the point clouds. Firstly, the distortion model in the existing rate-distortion optimization (RDO) is not consistent with the geometry quality assessment metrics. Secondly, the prediction methods in video codec","authors_text":"Hao Gao, Hongliang Li, Jian Xiong, King Ngi Ngan, Miaohui Wang, Weisi Lin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-03-11T09:24:05Z","title":"Advanced Geometry Surface Coding for Dynamic Point Cloud Compression"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.06549","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":"sha256:0c9b283f1c602aa26752540d1339a17c47cb09def745d4d3a54c6c55741f3c82","target":"record","created_at":"2026-07-05T02:22:10Z","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":"e051a8dfffdcdab927616db8d77605521e4c61a1a787942b619c61f84b68ed00","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-03-11T09:24:05Z","title_canon_sha256":"c667f4c589866e841527c5cd1b499f4c42122a879ccb5bfb27d566a5ae1d2494"},"schema_version":"1.0","source":{"id":"2103.06549","kind":"arxiv","version":1}},"canonical_sha256":"e465d4f3136c306b086ee15feaba3ac1a45da4a77ee5476b1f4743d8892f69ab","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e465d4f3136c306b086ee15feaba3ac1a45da4a77ee5476b1f4743d8892f69ab","first_computed_at":"2026-07-05T02:22:10.403801Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:22:10.403801Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nf34rrS7L7eZQ6OZHzbnNsgNLgtmB0CVbz2jeVDaZvBx01Xm2rYxvCbKnOIyVbk5wn+0syA5eh3gsmD+Yvj6CQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:22:10.404218Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.06549","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c9b283f1c602aa26752540d1339a17c47cb09def745d4d3a54c6c55741f3c82","sha256:50511442792b482bc3b97864af314f511051abb12465ba890639a37d4659f51a"],"state_sha256":"b2529dded2d4a2ae122e08cf8dfd6ba3009835c8286d8402fc9f43212222c0a2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y+4YrfR9KjDj0+VOK3R+lxjwWTkr63P6JErb13p2H7FdI+RKHTC62Ia1fmPqfr47KskP72oneOhPEo9OsQMPCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T22:40:02.407953Z","bundle_sha256":"d7567707967d3043f07d7c043575229994f6e0682a383aa5037542d7676cac57"}}