{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:647ILP57KQ36NAMNWUGNPHB322","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":"6d57110b7a8fc3bb3105f481425f476c342d0ebd299db2198d5b2e4af3041d84","cross_cats_sorted":["math.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-05-29T07:49:32Z","title_canon_sha256":"56b370721a4861dc7293f7955c8fec091e036e2e37840ce59e516fd5f2379e7b"},"schema_version":"1.0","source":{"id":"1705.10060","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.10060","created_at":"2026-05-18T00:43:32Z"},{"alias_kind":"arxiv_version","alias_value":"1705.10060v1","created_at":"2026-05-18T00:43:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.10060","created_at":"2026-05-18T00:43:32Z"},{"alias_kind":"pith_short_12","alias_value":"647ILP57KQ36","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"647ILP57KQ36NAMN","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"647ILP57","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:49c9ceda6c76f079a990842c2a5e5dcb10536f872340121abc267040f63ceedc","target":"graph","created_at":"2026-05-18T00:43:32Z","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":"A routine task for art historians is painting diagnostics, such as dating or attribution. Signal processing of the X-ray image of a canvas provides useful information about its fabric. However, previous methods may fail when very old and deteriorated artworks or simply canvases of small size are studied. We present a new framework to analyze and further characterize the paintings from their radiographs. First, we start from a general analysis of lattices and provide new unifying results about the theoretical spectra of weaves. Then, we use these results to infer the main structure of the fabri","authors_text":"Francisco J. Simois, Juan J. Murillo-Fuentes","cross_cats":["math.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-05-29T07:49:32Z","title":"On the Power Spectral Density Applied to the Analysis of Old Canvases"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.10060","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":"sha256:127433e678a0ec63c3815655f6b41afbd8c568e2b46b997d1694c04aaf81430d","target":"record","created_at":"2026-05-18T00:43:32Z","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":"6d57110b7a8fc3bb3105f481425f476c342d0ebd299db2198d5b2e4af3041d84","cross_cats_sorted":["math.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-05-29T07:49:32Z","title_canon_sha256":"56b370721a4861dc7293f7955c8fec091e036e2e37840ce59e516fd5f2379e7b"},"schema_version":"1.0","source":{"id":"1705.10060","kind":"arxiv","version":1}},"canonical_sha256":"f73e85bfbf5437e6818db50cd79c3bd68f6626c8c4b372c5a217b978ec674897","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f73e85bfbf5437e6818db50cd79c3bd68f6626c8c4b372c5a217b978ec674897","first_computed_at":"2026-05-18T00:43:32.051200Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:32.051200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+WcD1SkiVCGE006gsLlZQUclAtf0W7741jK2RQIFEg/RjJnkzJJkfTfppKqHW2k9kj4xY1oYgQOZQq5ViJe0Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:32.051817Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.10060","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:127433e678a0ec63c3815655f6b41afbd8c568e2b46b997d1694c04aaf81430d","sha256:49c9ceda6c76f079a990842c2a5e5dcb10536f872340121abc267040f63ceedc"],"state_sha256":"fb265e09bbe0da1c88622426c63b34662867d5688894c2becabe091b786f98de"}