{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:Z5BARCBXIRXSUFNXCXQ5AWR273","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":"3c3a4777992f2075d37c894b044eb9ebb0a263ba7098eac626f5cb6d58d64774","cross_cats_sorted":["cs.CG","cs.CV","cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-17T09:56:54Z","title_canon_sha256":"ac5df1dcb2cea61009ff60dc546001bc8ce6e0b1a508a42d7aeafb5c97135edf"},"schema_version":"1.0","source":{"id":"1908.06280","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.06280","created_at":"2026-07-05T03:57:59Z"},{"alias_kind":"arxiv_version","alias_value":"1908.06280v2","created_at":"2026-07-05T03:57:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.06280","created_at":"2026-07-05T03:57:59Z"},{"alias_kind":"pith_short_12","alias_value":"Z5BARCBXIRXS","created_at":"2026-07-05T03:57:59Z"},{"alias_kind":"pith_short_16","alias_value":"Z5BARCBXIRXSUFNX","created_at":"2026-07-05T03:57:59Z"},{"alias_kind":"pith_short_8","alias_value":"Z5BARCBX","created_at":"2026-07-05T03:57:59Z"}],"graph_snapshots":[{"event_id":"sha256:55351a31b5125049e51a326877ee6daa24a86b2ffdb0b4408201d5a8df524575","target":"graph","created_at":"2026-07-05T03:57:59Z","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/1908.06280/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Light field image quality assessment (LFI-QA) is a significant and challenging research problem. It helps to better guide light field acquisition, processing and applications. However, only a few objective models have been proposed and none of them completely consider intrinsic factors affecting the LFI quality. In this paper, we propose a No-Reference Light Field image Quality Assessment (NR-LFQA) scheme, where the main idea is to quantify the LFI quality degradation through evaluating the spatial quality and angular consistency. We first measure the spatial quality deterioration by capturing","authors_text":"Jinglin Zhang, Likun Shi, Wei Zhou, Zhibo Chen","cross_cats":["cs.CG","cs.CV","cs.MM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-17T09:56:54Z","title":"No-Reference Light Field Image Quality Assessment Based on Spatial-Angular Measurement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.06280","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":"sha256:8483439a507a6c2b07059eef1ee978b0ff1eafebc3807e37ba5da8df1fbde304","target":"record","created_at":"2026-07-05T03:57:59Z","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":"3c3a4777992f2075d37c894b044eb9ebb0a263ba7098eac626f5cb6d58d64774","cross_cats_sorted":["cs.CG","cs.CV","cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-17T09:56:54Z","title_canon_sha256":"ac5df1dcb2cea61009ff60dc546001bc8ce6e0b1a508a42d7aeafb5c97135edf"},"schema_version":"1.0","source":{"id":"1908.06280","kind":"arxiv","version":2}},"canonical_sha256":"cf42088837446f2a15b715e1d05a3afeea3592d161f97f9d6a227a832c16db4a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf42088837446f2a15b715e1d05a3afeea3592d161f97f9d6a227a832c16db4a","first_computed_at":"2026-07-05T03:57:59.375129Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:57:59.375129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G8fTaughLZbJUJdGnKYoG+Xi3iZFJpeANaGgA59tH9FrxyLqBnylabWQ8+7ZCD+o0poiJcUL1dDuXk0l74slAA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:57:59.375533Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.06280","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8483439a507a6c2b07059eef1ee978b0ff1eafebc3807e37ba5da8df1fbde304","sha256:55351a31b5125049e51a326877ee6daa24a86b2ffdb0b4408201d5a8df524575"],"state_sha256":"5ceb29885bf02566e5dee4cfd488b3d074792c34814ad25148dac7539c7e55fc"}