{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:CIIAUUADRG7JXRWYT564NCHMCW","short_pith_number":"pith:CIIAUUAD","schema_version":"1.0","canonical_sha256":"12100a500389be9bc6d89f7dc688ec1580c93a773c3d4a9f8ef9b93d9c0e0115","source":{"kind":"arxiv","id":"1901.03916","version":1},"attestation_state":"computed","paper":{"title":"LiFF: Light Field Features in Scale and Depth","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Bernd Girod, Donald G. Dansereau, Gordon Wetzstein","submitted_at":"2019-01-13T00:03:56Z","abstract_excerpt":"Feature detectors and descriptors are key low-level vision tools that many higher-level tasks build on. Unfortunately these fail in the presence of challenging light transport effects including partial occlusion, low contrast, and reflective or refractive surfaces. Building on spatio-angular imaging modalities offered by emerging light field cameras, we introduce a new and computationally efficient 4D light field feature detector and descriptor: LiFF. LiFF is scale invariant and utilizes the full 4D light field to detect features that are robust to changes in perspective. This is particularly "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1901.03916","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-01-13T00:03:56Z","cross_cats_sorted":[],"title_canon_sha256":"1b40a4cd7a8ae6c14a64b84dea644b475f52848fd0131dc8f03d96a60e00e80b","abstract_canon_sha256":"bdf0d69727853a5cb52367aa70c07e77371a0368b028cc2701d37845c663caf1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:26.732282Z","signature_b64":"YsGXq9REKYqz2cHYZHxhYhYRNQO2g5xGrcMycDj0V4T8YWzKheF0TJ/4QPMHDs7g6ZG2HIHgX6EsONmA1D3XAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12100a500389be9bc6d89f7dc688ec1580c93a773c3d4a9f8ef9b93d9c0e0115","last_reissued_at":"2026-05-17T23:56:26.731801Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:26.731801Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"LiFF: Light Field Features in Scale and Depth","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Bernd Girod, Donald G. Dansereau, Gordon Wetzstein","submitted_at":"2019-01-13T00:03:56Z","abstract_excerpt":"Feature detectors and descriptors are key low-level vision tools that many higher-level tasks build on. Unfortunately these fail in the presence of challenging light transport effects including partial occlusion, low contrast, and reflective or refractive surfaces. Building on spatio-angular imaging modalities offered by emerging light field cameras, we introduce a new and computationally efficient 4D light field feature detector and descriptor: LiFF. LiFF is scale invariant and utilizes the full 4D light field to detect features that are robust to changes in perspective. This is particularly "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03916","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1901.03916","created_at":"2026-05-17T23:56:26.731868+00:00"},{"alias_kind":"arxiv_version","alias_value":"1901.03916v1","created_at":"2026-05-17T23:56:26.731868+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03916","created_at":"2026-05-17T23:56:26.731868+00:00"},{"alias_kind":"pith_short_12","alias_value":"CIIAUUADRG7J","created_at":"2026-05-18T12:33:12.712433+00:00"},{"alias_kind":"pith_short_16","alias_value":"CIIAUUADRG7JXRWY","created_at":"2026-05-18T12:33:12.712433+00:00"},{"alias_kind":"pith_short_8","alias_value":"CIIAUUAD","created_at":"2026-05-18T12:33:12.712433+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/CIIAUUADRG7JXRWYT564NCHMCW","json":"https://pith.science/pith/CIIAUUADRG7JXRWYT564NCHMCW.json","graph_json":"https://pith.science/api/pith-number/CIIAUUADRG7JXRWYT564NCHMCW/graph.json","events_json":"https://pith.science/api/pith-number/CIIAUUADRG7JXRWYT564NCHMCW/events.json","paper":"https://pith.science/paper/CIIAUUAD"},"agent_actions":{"view_html":"https://pith.science/pith/CIIAUUADRG7JXRWYT564NCHMCW","download_json":"https://pith.science/pith/CIIAUUADRG7JXRWYT564NCHMCW.json","view_paper":"https://pith.science/paper/CIIAUUAD","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1901.03916&json=true","fetch_graph":"https://pith.science/api/pith-number/CIIAUUADRG7JXRWYT564NCHMCW/graph.json","fetch_events":"https://pith.science/api/pith-number/CIIAUUADRG7JXRWYT564NCHMCW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/CIIAUUADRG7JXRWYT564NCHMCW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/CIIAUUADRG7JXRWYT564NCHMCW/action/storage_attestation","attest_author":"https://pith.science/pith/CIIAUUADRG7JXRWYT564NCHMCW/action/author_attestation","sign_citation":"https://pith.science/pith/CIIAUUADRG7JXRWYT564NCHMCW/action/citation_signature","submit_replication":"https://pith.science/pith/CIIAUUADRG7JXRWYT564NCHMCW/action/replication_record"}},"created_at":"2026-05-17T23:56:26.731868+00:00","updated_at":"2026-05-17T23:56:26.731868+00:00"}