{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:VGXJ7MUHKYI3LPYTGO5ETEOGVS","short_pith_number":"pith:VGXJ7MUH","canonical_record":{"source":{"id":"2012.11895","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-12-22T09:29:10Z","cross_cats_sorted":[],"title_canon_sha256":"07b3a455ba8184996f193c8c4a82ac8a68317f8bc4d60cc2a58c010f17b55d96","abstract_canon_sha256":"e2a93b53fc586d0de1d2d25783fcd40b3d9359f8186667ee080ecabf0a7848b7"},"schema_version":"1.0"},"canonical_sha256":"a9ae9fb2875611b5bf1333ba4991c6ac919a10e2fe94b2be1e87f1657b730c1c","source":{"kind":"arxiv","id":"2012.11895","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.11895","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"arxiv_version","alias_value":"2012.11895v4","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.11895","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"pith_short_12","alias_value":"VGXJ7MUHKYI3","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"pith_short_16","alias_value":"VGXJ7MUHKYI3LPYT","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"pith_short_8","alias_value":"VGXJ7MUH","created_at":"2026-07-05T04:42:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:VGXJ7MUHKYI3LPYTGO5ETEOGVS","target":"record","payload":{"canonical_record":{"source":{"id":"2012.11895","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-12-22T09:29:10Z","cross_cats_sorted":[],"title_canon_sha256":"07b3a455ba8184996f193c8c4a82ac8a68317f8bc4d60cc2a58c010f17b55d96","abstract_canon_sha256":"e2a93b53fc586d0de1d2d25783fcd40b3d9359f8186667ee080ecabf0a7848b7"},"schema_version":"1.0"},"canonical_sha256":"a9ae9fb2875611b5bf1333ba4991c6ac919a10e2fe94b2be1e87f1657b730c1c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:42:30.097381Z","signature_b64":"fpsEYd2kiKrKR8H1EkwNs6z6s/vEjpnIceoZ4P7vMsFrWUw+V6aOd6fH7Gl0P4PE74DqxsIC0hfwQcjdyoXYDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a9ae9fb2875611b5bf1333ba4991c6ac919a10e2fe94b2be1e87f1657b730c1c","last_reissued_at":"2026-07-05T04:42:30.096959Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:42:30.096959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.11895","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:42:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lK5jLEtLL1KVi3d4UhFkWkMOFZseiZNbqHZirquo8EwBjziu16YZYK0QinlbP7o3twxI3C+mxa533aJiI1HtAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T07:16:50.624328Z"},"content_sha256":"57b71a746f63e5ed7986c4d941cfc78fb48d82e7475b5614b492769a43a4e791","schema_version":"1.0","event_id":"sha256:57b71a746f63e5ed7986c4d941cfc78fb48d82e7475b5614b492769a43a4e791"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:VGXJ7MUHKYI3LPYTGO5ETEOGVS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Point Cloud Quality Assessment: Dataset Construction and Learning-based No-Reference Metric","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.IV","authors_text":"Le Yang, Qi Yang, Yiling Xu, Yipeng Liu","submitted_at":"2020-12-22T09:29:10Z","abstract_excerpt":"Full-reference (FR) point cloud quality assessment (PCQA) has achieved impressive progress in recent years. However, in many cases, obtaining the reference point clouds is difficult, so no-reference (NR) metrics have become a research hotspot. Few researches about NR-PCQA are carried out due to the lack of a large-scale PCQA dataset. In this paper, we first build a large-scale PCQA dataset named LS-PCQA, which includes 104 reference point clouds and more than 22,000 distorted samples. In the dataset, each reference point cloud is augmented with 31 types of impairments (e.g., Gaussian noise, co"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.11895","kind":"arxiv","version":4},"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/2012.11895/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":"2026-07-05T04:42:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D/SQje1cgDJ1ejxgHYjNKENvsjEhFGcb/3jxrH+xnsvWnK0UGsQ96KSmCrdIv0VNzIiU0ZPeDtT9kjneZ3gJAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T07:16:50.624817Z"},"content_sha256":"dd8c13a1e201348f4fafad52e1b4be02f95ef84978b700e1c2753ebbf0d3203d","schema_version":"1.0","event_id":"sha256:dd8c13a1e201348f4fafad52e1b4be02f95ef84978b700e1c2753ebbf0d3203d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VGXJ7MUHKYI3LPYTGO5ETEOGVS/bundle.json","state_url":"https://pith.science/pith/VGXJ7MUHKYI3LPYTGO5ETEOGVS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VGXJ7MUHKYI3LPYTGO5ETEOGVS/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":"2026-08-01T07:16:50Z","links":{"resolver":"https://pith.science/pith/VGXJ7MUHKYI3LPYTGO5ETEOGVS","bundle":"https://pith.science/pith/VGXJ7MUHKYI3LPYTGO5ETEOGVS/bundle.json","state":"https://pith.science/pith/VGXJ7MUHKYI3LPYTGO5ETEOGVS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VGXJ7MUHKYI3LPYTGO5ETEOGVS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:VGXJ7MUHKYI3LPYTGO5ETEOGVS","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":"e2a93b53fc586d0de1d2d25783fcd40b3d9359f8186667ee080ecabf0a7848b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-12-22T09:29:10Z","title_canon_sha256":"07b3a455ba8184996f193c8c4a82ac8a68317f8bc4d60cc2a58c010f17b55d96"},"schema_version":"1.0","source":{"id":"2012.11895","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.11895","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"arxiv_version","alias_value":"2012.11895v4","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.11895","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"pith_short_12","alias_value":"VGXJ7MUHKYI3","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"pith_short_16","alias_value":"VGXJ7MUHKYI3LPYT","created_at":"2026-07-05T04:42:30Z"},{"alias_kind":"pith_short_8","alias_value":"VGXJ7MUH","created_at":"2026-07-05T04:42:30Z"}],"graph_snapshots":[{"event_id":"sha256:dd8c13a1e201348f4fafad52e1b4be02f95ef84978b700e1c2753ebbf0d3203d","target":"graph","created_at":"2026-07-05T04:42:30Z","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/2012.11895/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Full-reference (FR) point cloud quality assessment (PCQA) has achieved impressive progress in recent years. However, in many cases, obtaining the reference point clouds is difficult, so no-reference (NR) metrics have become a research hotspot. Few researches about NR-PCQA are carried out due to the lack of a large-scale PCQA dataset. In this paper, we first build a large-scale PCQA dataset named LS-PCQA, which includes 104 reference point clouds and more than 22,000 distorted samples. In the dataset, each reference point cloud is augmented with 31 types of impairments (e.g., Gaussian noise, co","authors_text":"Le Yang, Qi Yang, Yiling Xu, Yipeng Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-12-22T09:29:10Z","title":"Point Cloud Quality Assessment: Dataset Construction and Learning-based No-Reference Metric"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.11895","kind":"arxiv","version":4},"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":"sha256:57b71a746f63e5ed7986c4d941cfc78fb48d82e7475b5614b492769a43a4e791","target":"record","created_at":"2026-07-05T04:42:30Z","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":"e2a93b53fc586d0de1d2d25783fcd40b3d9359f8186667ee080ecabf0a7848b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-12-22T09:29:10Z","title_canon_sha256":"07b3a455ba8184996f193c8c4a82ac8a68317f8bc4d60cc2a58c010f17b55d96"},"schema_version":"1.0","source":{"id":"2012.11895","kind":"arxiv","version":4}},"canonical_sha256":"a9ae9fb2875611b5bf1333ba4991c6ac919a10e2fe94b2be1e87f1657b730c1c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a9ae9fb2875611b5bf1333ba4991c6ac919a10e2fe94b2be1e87f1657b730c1c","first_computed_at":"2026-07-05T04:42:30.096959Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:42:30.096959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fpsEYd2kiKrKR8H1EkwNs6z6s/vEjpnIceoZ4P7vMsFrWUw+V6aOd6fH7Gl0P4PE74DqxsIC0hfwQcjdyoXYDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:42:30.097381Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.11895","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:57b71a746f63e5ed7986c4d941cfc78fb48d82e7475b5614b492769a43a4e791","sha256:dd8c13a1e201348f4fafad52e1b4be02f95ef84978b700e1c2753ebbf0d3203d"],"state_sha256":"013a67098be85ceab2502fdae86dd31edc0599f4d9b1406bfd7ffbbf15e227f8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lnIVvXL9dE8Dx+jcApu6fS9orljK9LLhrhT/7x+YpOFpUThez5q6MqZ+Gg/VfZ5CaHhv+eE7RDrIV/OPmvIBCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T07:16:50.627939Z","bundle_sha256":"a949c55dc9228ccabcd951b064cff5fe2a3f1501114897c68e1b8aa5e3f893c0"}}