{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:NMUQ3JYP7GNYAMIKGXUOJQOC66","short_pith_number":"pith:NMUQ3JYP","canonical_record":{"source":{"id":"1406.6425","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2014-06-25T00:46:10Z","cross_cats_sorted":[],"title_canon_sha256":"985e7a9eb2725512af1e2330732459021109e7e9f7e64e8940d6d8914e583126","abstract_canon_sha256":"37aa384dcec70a9b6e9579219d7b2a54d210315915908faf5737840d63fd0e26"},"schema_version":"1.0"},"canonical_sha256":"6b290da70ff99b80310a35e8e4c1c2f7bf4a5f8f1aad92368b912867650efc63","source":{"kind":"arxiv","id":"1406.6425","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.6425","created_at":"2026-05-18T01:36:56Z"},{"alias_kind":"arxiv_version","alias_value":"1406.6425v2","created_at":"2026-05-18T01:36:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.6425","created_at":"2026-05-18T01:36:56Z"},{"alias_kind":"pith_short_12","alias_value":"NMUQ3JYP7GNY","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"NMUQ3JYP7GNYAMIK","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"NMUQ3JYP","created_at":"2026-05-18T12:28:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:NMUQ3JYP7GNYAMIKGXUOJQOC66","target":"record","payload":{"canonical_record":{"source":{"id":"1406.6425","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2014-06-25T00:46:10Z","cross_cats_sorted":[],"title_canon_sha256":"985e7a9eb2725512af1e2330732459021109e7e9f7e64e8940d6d8914e583126","abstract_canon_sha256":"37aa384dcec70a9b6e9579219d7b2a54d210315915908faf5737840d63fd0e26"},"schema_version":"1.0"},"canonical_sha256":"6b290da70ff99b80310a35e8e4c1c2f7bf4a5f8f1aad92368b912867650efc63","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:36:56.968017Z","signature_b64":"tUNwpZdvoY0JPPbu1baZBaG0QL+Uj+QORsOjubfuOCZ4Q9tCMll83+Q3UzS/HTObassyTzAdOteDX7YBYRCiCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6b290da70ff99b80310a35e8e4c1c2f7bf4a5f8f1aad92368b912867650efc63","last_reissued_at":"2026-05-18T01:36:56.967470Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:36:56.967470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1406.6425","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:36:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N0cdFZDfFE0erxkKNpmJSypoYVXu6UEoHMnJpOC2dOZlDoow8H9TFxTZhCY2aEGM1gzM7xabqGut+2KomOmSDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:50:40.974353Z"},"content_sha256":"190d744e8152288513e3dd1488d65ea73b7efe8d2e63030f24c9e82a51db3628","schema_version":"1.0","event_id":"sha256:190d744e8152288513e3dd1488d65ea73b7efe8d2e63030f24c9e82a51db3628"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:NMUQ3JYP7GNYAMIKGXUOJQOC66","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Compressive Imaging and Characterization of Sparse Light Deflection Maps","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Laurent Jacques, Luc Joannes, Philippe Antoine, Prasad Sudhakar, Xavier Dubois","submitted_at":"2014-06-25T00:46:10Z","abstract_excerpt":"Light rays incident on a transparent object of uniform refractive index undergo deflections, which uniquely characterize the surface geometry of the object. Associated with each point on the surface is a deflection map (or spectrum) which describes the pattern of deflections in various directions. This article presents a novel method to efficiently acquire and reconstruct sparse deflection spectra induced by smooth object surfaces. To this end, we leverage the framework of Compressed Sensing (CS) in a particular implementation of a schlieren deflectometer, i.e., an optical system providing lin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.6425","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:36:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qpSVcc91pdmEctQ74SZqkoRXMHzwG6bVrCotvYagNaNiWqxS/xxbxlODKxURQfi2NgdGQ6jrJF/NQLRtfyxhBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-08T19:50:40.975043Z"},"content_sha256":"88997597bfc9492a5977c9b2b592e77cae9e0f0f4cb0650df657ac7a706993ba","schema_version":"1.0","event_id":"sha256:88997597bfc9492a5977c9b2b592e77cae9e0f0f4cb0650df657ac7a706993ba"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NMUQ3JYP7GNYAMIKGXUOJQOC66/bundle.json","state_url":"https://pith.science/pith/NMUQ3JYP7GNYAMIKGXUOJQOC66/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NMUQ3JYP7GNYAMIKGXUOJQOC66/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-08T19:50:40Z","links":{"resolver":"https://pith.science/pith/NMUQ3JYP7GNYAMIKGXUOJQOC66","bundle":"https://pith.science/pith/NMUQ3JYP7GNYAMIKGXUOJQOC66/bundle.json","state":"https://pith.science/pith/NMUQ3JYP7GNYAMIKGXUOJQOC66/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NMUQ3JYP7GNYAMIKGXUOJQOC66/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:NMUQ3JYP7GNYAMIKGXUOJQOC66","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":"37aa384dcec70a9b6e9579219d7b2a54d210315915908faf5737840d63fd0e26","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2014-06-25T00:46:10Z","title_canon_sha256":"985e7a9eb2725512af1e2330732459021109e7e9f7e64e8940d6d8914e583126"},"schema_version":"1.0","source":{"id":"1406.6425","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1406.6425","created_at":"2026-05-18T01:36:56Z"},{"alias_kind":"arxiv_version","alias_value":"1406.6425v2","created_at":"2026-05-18T01:36:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.6425","created_at":"2026-05-18T01:36:56Z"},{"alias_kind":"pith_short_12","alias_value":"NMUQ3JYP7GNY","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"NMUQ3JYP7GNYAMIK","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"NMUQ3JYP","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:88997597bfc9492a5977c9b2b592e77cae9e0f0f4cb0650df657ac7a706993ba","target":"graph","created_at":"2026-05-18T01:36:56Z","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":"Light rays incident on a transparent object of uniform refractive index undergo deflections, which uniquely characterize the surface geometry of the object. Associated with each point on the surface is a deflection map (or spectrum) which describes the pattern of deflections in various directions. This article presents a novel method to efficiently acquire and reconstruct sparse deflection spectra induced by smooth object surfaces. To this end, we leverage the framework of Compressed Sensing (CS) in a particular implementation of a schlieren deflectometer, i.e., an optical system providing lin","authors_text":"Laurent Jacques, Luc Joannes, Philippe Antoine, Prasad Sudhakar, Xavier Dubois","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2014-06-25T00:46:10Z","title":"Compressive Imaging and Characterization of Sparse Light Deflection Maps"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.6425","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":"sha256:190d744e8152288513e3dd1488d65ea73b7efe8d2e63030f24c9e82a51db3628","target":"record","created_at":"2026-05-18T01:36:56Z","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":"37aa384dcec70a9b6e9579219d7b2a54d210315915908faf5737840d63fd0e26","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2014-06-25T00:46:10Z","title_canon_sha256":"985e7a9eb2725512af1e2330732459021109e7e9f7e64e8940d6d8914e583126"},"schema_version":"1.0","source":{"id":"1406.6425","kind":"arxiv","version":2}},"canonical_sha256":"6b290da70ff99b80310a35e8e4c1c2f7bf4a5f8f1aad92368b912867650efc63","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6b290da70ff99b80310a35e8e4c1c2f7bf4a5f8f1aad92368b912867650efc63","first_computed_at":"2026-05-18T01:36:56.967470Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:36:56.967470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tUNwpZdvoY0JPPbu1baZBaG0QL+Uj+QORsOjubfuOCZ4Q9tCMll83+Q3UzS/HTObassyTzAdOteDX7YBYRCiCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:36:56.968017Z","signed_message":"canonical_sha256_bytes"},"source_id":"1406.6425","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:190d744e8152288513e3dd1488d65ea73b7efe8d2e63030f24c9e82a51db3628","sha256:88997597bfc9492a5977c9b2b592e77cae9e0f0f4cb0650df657ac7a706993ba"],"state_sha256":"35b93365ea25317286a3dddfa7962465cc7ab5d42b207d5959bb6c175c0ab302"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GPf0gHJwMbwWB1bLxaA42FGFu4teVKHzLn6smGAllaBeEmBcsUJ4PIxFB8TcMD19q5Vm+5WZnaNON7CpN2ShBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-08T19:50:40.978339Z","bundle_sha256":"472220ea54476b7509b7c9aba8f343cfeb87f0f4b74d6e31fb294711b2c4d714"}}