{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:4ORLRZW4KEETDKO3E4X56YIHFP","short_pith_number":"pith:4ORLRZW4","schema_version":"1.0","canonical_sha256":"e3a2b8e6dc510931a9db272fdf61072bdd863065f23028cd97873b4ed1d047cf","source":{"kind":"arxiv","id":"2606.10350","version":1},"attestation_state":"computed","paper":{"title":"Multi-Angular Reflectance Anisotropy Observed from UAV Multispectral Imagery","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Chenguang Dai, Min Wang, Xian Li, Zhenqiang Qin","submitted_at":"2026-06-09T02:58:30Z","abstract_excerpt":"UAV multispectral imagery naturally contains multi-angular observations due to low flight altitude and wide field-of-view imaging, which may introduce geometry-driven radiometric variability. This study proposes a geometry-aware multi-angular observation extraction workflow to quantify observation-geometry effects from a BRDF perspective. Specifically, camera intrinsics and extrinsics are refined via structure-from-motion (SFM), and homogeneous regions annotated on an orthomosaic are reprojected onto multiple raw sub-images acquired from different viewpoints. This enables joint extraction of m"},"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":"2606.10350","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-06-09T02:58:30Z","cross_cats_sorted":[],"title_canon_sha256":"13b1f3806d2b0137cd31835cbf115f515f5a6478b7323a35199244c7aa02bc69","abstract_canon_sha256":"8556883c865dd4c7077002230352088a7af08da4170dae979ec1a3d652115a0e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-10T01:10:13.170540Z","signature_b64":"VzSvSa4+gAw1PhKTzNxLFUvzTlwVV4RBWVPXUXGhoJ3UJlk20gMzT6QfpKD9w03S3YG/KCVsJrbHI3t6YJTuAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e3a2b8e6dc510931a9db272fdf61072bdd863065f23028cd97873b4ed1d047cf","last_reissued_at":"2026-06-10T01:10:13.169877Z","signature_status":"signed_v1","first_computed_at":"2026-06-10T01:10:13.169877Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Multi-Angular Reflectance Anisotropy Observed from UAV Multispectral Imagery","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Chenguang Dai, Min Wang, Xian Li, Zhenqiang Qin","submitted_at":"2026-06-09T02:58:30Z","abstract_excerpt":"UAV multispectral imagery naturally contains multi-angular observations due to low flight altitude and wide field-of-view imaging, which may introduce geometry-driven radiometric variability. This study proposes a geometry-aware multi-angular observation extraction workflow to quantify observation-geometry effects from a BRDF perspective. Specifically, camera intrinsics and extrinsics are refined via structure-from-motion (SFM), and homogeneous regions annotated on an orthomosaic are reprojected onto multiple raw sub-images acquired from different viewpoints. This enables joint extraction of m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.10350","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.10350/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2606.10350","created_at":"2026-06-10T01:10:13.169997+00:00"},{"alias_kind":"arxiv_version","alias_value":"2606.10350v1","created_at":"2026-06-10T01:10:13.169997+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.10350","created_at":"2026-06-10T01:10:13.169997+00:00"},{"alias_kind":"pith_short_12","alias_value":"4ORLRZW4KEET","created_at":"2026-06-10T01:10:13.169997+00:00"},{"alias_kind":"pith_short_16","alias_value":"4ORLRZW4KEETDKO3","created_at":"2026-06-10T01:10:13.169997+00:00"},{"alias_kind":"pith_short_8","alias_value":"4ORLRZW4","created_at":"2026-06-10T01:10:13.169997+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/4ORLRZW4KEETDKO3E4X56YIHFP","json":"https://pith.science/pith/4ORLRZW4KEETDKO3E4X56YIHFP.json","graph_json":"https://pith.science/api/pith-number/4ORLRZW4KEETDKO3E4X56YIHFP/graph.json","events_json":"https://pith.science/api/pith-number/4ORLRZW4KEETDKO3E4X56YIHFP/events.json","paper":"https://pith.science/paper/4ORLRZW4"},"agent_actions":{"view_html":"https://pith.science/pith/4ORLRZW4KEETDKO3E4X56YIHFP","download_json":"https://pith.science/pith/4ORLRZW4KEETDKO3E4X56YIHFP.json","view_paper":"https://pith.science/paper/4ORLRZW4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2606.10350&json=true","fetch_graph":"https://pith.science/api/pith-number/4ORLRZW4KEETDKO3E4X56YIHFP/graph.json","fetch_events":"https://pith.science/api/pith-number/4ORLRZW4KEETDKO3E4X56YIHFP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4ORLRZW4KEETDKO3E4X56YIHFP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4ORLRZW4KEETDKO3E4X56YIHFP/action/storage_attestation","attest_author":"https://pith.science/pith/4ORLRZW4KEETDKO3E4X56YIHFP/action/author_attestation","sign_citation":"https://pith.science/pith/4ORLRZW4KEETDKO3E4X56YIHFP/action/citation_signature","submit_replication":"https://pith.science/pith/4ORLRZW4KEETDKO3E4X56YIHFP/action/replication_record"}},"created_at":"2026-06-10T01:10:13.169997+00:00","updated_at":"2026-06-10T01:10:13.169997+00:00"}