{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:DTTXTN53RX2YCOL3SDVBI4E63J","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":"02787e6c324e5f15e0681b9350f3e22d804697d3190691b191ffe24bddeb479e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"physics.optics","submitted_at":"2026-01-19T21:15:38Z","title_canon_sha256":"62b721c7850962cb45be9a0015c6f369afdc6a58db00054fc40c563d9e1beab5"},"schema_version":"1.0","source":{"id":"2601.13402","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2601.13402","created_at":"2026-05-20T00:03:02Z"},{"alias_kind":"arxiv_version","alias_value":"2601.13402v2","created_at":"2026-05-20T00:03:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2601.13402","created_at":"2026-05-20T00:03:02Z"},{"alias_kind":"pith_short_12","alias_value":"DTTXTN53RX2Y","created_at":"2026-05-20T00:03:02Z"},{"alias_kind":"pith_short_16","alias_value":"DTTXTN53RX2YCOL3","created_at":"2026-05-20T00:03:02Z"},{"alias_kind":"pith_short_8","alias_value":"DTTXTN53","created_at":"2026-05-20T00:03:02Z"}],"graph_snapshots":[{"event_id":"sha256:56ad26612385ca6212061c37fda9c8b44c940421fe0521d3248e88142ffa482d","target":"graph","created_at":"2026-05-20T00:03:02Z","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/2601.13402/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We made a detailed review of the difference measures which have been used to judge the differences between experimentally determined color differences and theoretically defined ones, so-called line elements, for the human visual system. To eliminate the statistical errors due to variable and usually arbitrary sampling of the directions in a color point, we integrate the measures over a complete ellipsoid/ellipse. It turns out that in the limit for small deviations from circularity all proposed measures ($V_{AB}$, $\\gamma-1$, $CV$ and $\\mathrm{STRESS}$) are equivalent. For greater deviations th","authors_text":"Patrick De Visschere","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"physics.optics","submitted_at":"2026-01-19T21:15:38Z","title":"Review of Measures Used for Evaluating Color Difference Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2601.13402","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":"sha256:8574cee224abe108020c86d9ec633cc62ab9f197353eb9f94ece64fed0ae929e","target":"record","created_at":"2026-05-20T00:03:02Z","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":"02787e6c324e5f15e0681b9350f3e22d804697d3190691b191ffe24bddeb479e","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"physics.optics","submitted_at":"2026-01-19T21:15:38Z","title_canon_sha256":"62b721c7850962cb45be9a0015c6f369afdc6a58db00054fc40c563d9e1beab5"},"schema_version":"1.0","source":{"id":"2601.13402","kind":"arxiv","version":2}},"canonical_sha256":"1ce779b7bb8df581397b90ea14709eda52de1b15ef014786163f5cb8043712e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1ce779b7bb8df581397b90ea14709eda52de1b15ef014786163f5cb8043712e2","first_computed_at":"2026-05-20T00:03:02.583405Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T00:03:02.583405Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B5r2s8pUPBgBpZ19uPU5xXQWwLGxP0NiWh+ISVbi1TaHvhO6tpxd02PtPDkSlG0rPwS0boSr+8/ibF9tS2BlBw==","signature_status":"signed_v1","signed_at":"2026-05-20T00:03:02.584232Z","signed_message":"canonical_sha256_bytes"},"source_id":"2601.13402","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8574cee224abe108020c86d9ec633cc62ab9f197353eb9f94ece64fed0ae929e","sha256:56ad26612385ca6212061c37fda9c8b44c940421fe0521d3248e88142ffa482d"],"state_sha256":"6a1fae929c1f3eb33281027de927276a8dd5317d80144011ef8a2fa88152a410"}