{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:7KZBCWJM2PMRXYSGOKQY3X562Z","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":"799114f33b03ac0f2b5cfd5b1790b5146957daf87e25c0ee932b7f330f2fcb73","cross_cats_sorted":["eess.IV","physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-07-12T14:16:35Z","title_canon_sha256":"29ccfeda9f157227ccb3bebfdd9140e38941aa595eaa92fcee10e9e7a968accf"},"schema_version":"1.0","source":{"id":"2007.05996","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.05996","created_at":"2026-07-05T01:18:08Z"},{"alias_kind":"arxiv_version","alias_value":"2007.05996v1","created_at":"2026-07-05T01:18:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.05996","created_at":"2026-07-05T01:18:08Z"},{"alias_kind":"pith_short_12","alias_value":"7KZBCWJM2PMR","created_at":"2026-07-05T01:18:08Z"},{"alias_kind":"pith_short_16","alias_value":"7KZBCWJM2PMRXYSG","created_at":"2026-07-05T01:18:08Z"},{"alias_kind":"pith_short_8","alias_value":"7KZBCWJM","created_at":"2026-07-05T01:18:08Z"}],"graph_snapshots":[{"event_id":"sha256:5768621e946699bcc60648d3494feb139602d97e9fd53f9876907e4b89cd2ffe","target":"graph","created_at":"2026-07-05T01:18:08Z","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/2007.05996/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Hyperspectral unmixing is an important remote sensing task with applications including material identification and analysis. Characteristic spectral features make many pure materials identifiable from their visible-to-infrared spectra, but quantifying their presence within a mixture is a challenging task due to nonlinearities and factors of variation. In this paper, spectral variation is considered from a physics-based approach and incorporated into an end-to-end spectral unmixing algorithm via differentiable programming. The dispersion model is introduced to simulate realistic spectral variat","authors_text":"Christopher S. Edwards, Gautam Dasarathy, John Janiczek, Parth Thaker, Philip Christensen, Suren Jayasuriya","cross_cats":["eess.IV","physics.ao-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-07-12T14:16:35Z","title":"Differentiable Programming for Hyperspectral Unmixing using a Physics-based Dispersion Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.05996","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":"sha256:3701f7462e5adb284cf9a1dd046a4c286241f240cbdef7a7f385c6b576a4467a","target":"record","created_at":"2026-07-05T01:18:08Z","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":"799114f33b03ac0f2b5cfd5b1790b5146957daf87e25c0ee932b7f330f2fcb73","cross_cats_sorted":["eess.IV","physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-07-12T14:16:35Z","title_canon_sha256":"29ccfeda9f157227ccb3bebfdd9140e38941aa595eaa92fcee10e9e7a968accf"},"schema_version":"1.0","source":{"id":"2007.05996","kind":"arxiv","version":1}},"canonical_sha256":"fab211592cd3d91be24672a18ddfbed67ea489fd01cd9ecdcf507df0894d9dae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fab211592cd3d91be24672a18ddfbed67ea489fd01cd9ecdcf507df0894d9dae","first_computed_at":"2026-07-05T01:18:08.984610Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:18:08.984610Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gW298yRmWY33wQ4Sb0g4qvMIFkC5aAPp9szkdo9ChyA1Qd4kRuYmbKigr+lZCTy/oktWZnkoP4edXBjmLLKQCg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:18:08.985006Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.05996","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3701f7462e5adb284cf9a1dd046a4c286241f240cbdef7a7f385c6b576a4467a","sha256:5768621e946699bcc60648d3494feb139602d97e9fd53f9876907e4b89cd2ffe"],"state_sha256":"1c0da329d57c4824be32d3493f67b137e8389fb275aedd44bbcd471131a5a8a1"}