{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:LCL2I7M32CN7X2TDTO6L2RUCS2","short_pith_number":"pith:LCL2I7M3","canonical_record":{"source":{"id":"1906.04155","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-07T13:03:01Z","cross_cats_sorted":["astro-ph.IM","eess.IV","physics.optics"],"title_canon_sha256":"f41e8101f1061f9e72ec2baa4bc39612583630e4773c2481452d7c2aa88aeb1e","abstract_canon_sha256":"2e0805136a08be8a1ef01d2349784138531a7e29d98d8b9274ff0f55790cd773"},"schema_version":"1.0"},"canonical_sha256":"5897a47d9bd09bfbea639bbcbd468296abda114e2e937bbea5004c3ffecba48a","source":{"kind":"arxiv","id":"1906.04155","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.04155","created_at":"2026-05-17T23:42:41Z"},{"alias_kind":"arxiv_version","alias_value":"1906.04155v1","created_at":"2026-05-17T23:42:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.04155","created_at":"2026-05-17T23:42:41Z"},{"alias_kind":"pith_short_12","alias_value":"LCL2I7M32CN7","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LCL2I7M32CN7X2TD","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LCL2I7M3","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:LCL2I7M32CN7X2TDTO6L2RUCS2","target":"record","payload":{"canonical_record":{"source":{"id":"1906.04155","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-07T13:03:01Z","cross_cats_sorted":["astro-ph.IM","eess.IV","physics.optics"],"title_canon_sha256":"f41e8101f1061f9e72ec2baa4bc39612583630e4773c2481452d7c2aa88aeb1e","abstract_canon_sha256":"2e0805136a08be8a1ef01d2349784138531a7e29d98d8b9274ff0f55790cd773"},"schema_version":"1.0"},"canonical_sha256":"5897a47d9bd09bfbea639bbcbd468296abda114e2e937bbea5004c3ffecba48a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:41.427757Z","signature_b64":"Ed9Dvz8MYK2maWUoVnWay/JsEMRz0slckMLdSmCbi8KyYGqa/f9BrF4YQzXY3tWV007F/ID6WA7aDPQRw3M+BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5897a47d9bd09bfbea639bbcbd468296abda114e2e937bbea5004c3ffecba48a","last_reissued_at":"2026-05-17T23:42:41.427118Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:41.427118Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.04155","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:42:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Db1cPbNA1YO1Dabge2yMvUuw38A5pmLUOmhS3+CMP+MVMWAc2JVVOo/3ecE0ctb8NB3GwUFpHV9RqEQM6E/pDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T20:41:15.401033Z"},"content_sha256":"daf36071bb2b21c65925da0e9d6cd718d6e03fc86a67e58356a6d22caaed3dd3","schema_version":"1.0","event_id":"sha256:daf36071bb2b21c65925da0e9d6cd718d6e03fc86a67e58356a6d22caaed3dd3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:LCL2I7M32CN7X2TDTO6L2RUCS2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Standardized spectral and radiometric calibration of consumer cameras","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","eess.IV","physics.optics"],"primary_cat":"physics.ins-det","authors_text":"Carlos Tapia, Evangelos Spyrakos, Frans Snik, Jaime Zamorano, Klaas Pauly, Norbert Schmidt, Olivier Burggraaff, Sergio Pascual","submitted_at":"2019-06-07T13:03:01Z","abstract_excerpt":"Consumer cameras, particularly onboard smartphones and UAVs, are now commonly used as scientific instruments. However, their data processing pipelines are not optimized for quantitative radiometry and their calibration is more complex than that of scientific cameras. The lack of a standardized calibration methodology limits the interoperability between devices and, in the ever-changing market, ultimately the lifespan of projects using them. We present a standardized methodology and database (SPECTACLE) for spectral and radiometric calibrations of consumer cameras, including linearity, bias var"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.04155","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:42:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u+CUmg7glYi/n0b5jhLpp+PU1WbasOQdXsYCK5wKYJiQizT2kpAa9OD8Eviyul5sbHcO6VWLKu3KUNFnDMVWAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T20:41:15.401711Z"},"content_sha256":"11b881ab83d832a2ede96bd547d563411feb02388f1b2094c0d2633709c74a6f","schema_version":"1.0","event_id":"sha256:11b881ab83d832a2ede96bd547d563411feb02388f1b2094c0d2633709c74a6f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LCL2I7M32CN7X2TDTO6L2RUCS2/bundle.json","state_url":"https://pith.science/pith/LCL2I7M32CN7X2TDTO6L2RUCS2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LCL2I7M32CN7X2TDTO6L2RUCS2/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":"2026-05-23T20:41:15Z","links":{"resolver":"https://pith.science/pith/LCL2I7M32CN7X2TDTO6L2RUCS2","bundle":"https://pith.science/pith/LCL2I7M32CN7X2TDTO6L2RUCS2/bundle.json","state":"https://pith.science/pith/LCL2I7M32CN7X2TDTO6L2RUCS2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LCL2I7M32CN7X2TDTO6L2RUCS2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:LCL2I7M32CN7X2TDTO6L2RUCS2","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":"2e0805136a08be8a1ef01d2349784138531a7e29d98d8b9274ff0f55790cd773","cross_cats_sorted":["astro-ph.IM","eess.IV","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-07T13:03:01Z","title_canon_sha256":"f41e8101f1061f9e72ec2baa4bc39612583630e4773c2481452d7c2aa88aeb1e"},"schema_version":"1.0","source":{"id":"1906.04155","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.04155","created_at":"2026-05-17T23:42:41Z"},{"alias_kind":"arxiv_version","alias_value":"1906.04155v1","created_at":"2026-05-17T23:42:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.04155","created_at":"2026-05-17T23:42:41Z"},{"alias_kind":"pith_short_12","alias_value":"LCL2I7M32CN7","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"LCL2I7M32CN7X2TD","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"LCL2I7M3","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:11b881ab83d832a2ede96bd547d563411feb02388f1b2094c0d2633709c74a6f","target":"graph","created_at":"2026-05-17T23:42:41Z","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":"Consumer cameras, particularly onboard smartphones and UAVs, are now commonly used as scientific instruments. However, their data processing pipelines are not optimized for quantitative radiometry and their calibration is more complex than that of scientific cameras. The lack of a standardized calibration methodology limits the interoperability between devices and, in the ever-changing market, ultimately the lifespan of projects using them. We present a standardized methodology and database (SPECTACLE) for spectral and radiometric calibrations of consumer cameras, including linearity, bias var","authors_text":"Carlos Tapia, Evangelos Spyrakos, Frans Snik, Jaime Zamorano, Klaas Pauly, Norbert Schmidt, Olivier Burggraaff, Sergio Pascual","cross_cats":["astro-ph.IM","eess.IV","physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-07T13:03:01Z","title":"Standardized spectral and radiometric calibration of consumer cameras"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.04155","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:daf36071bb2b21c65925da0e9d6cd718d6e03fc86a67e58356a6d22caaed3dd3","target":"record","created_at":"2026-05-17T23:42:41Z","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":"2e0805136a08be8a1ef01d2349784138531a7e29d98d8b9274ff0f55790cd773","cross_cats_sorted":["astro-ph.IM","eess.IV","physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2019-06-07T13:03:01Z","title_canon_sha256":"f41e8101f1061f9e72ec2baa4bc39612583630e4773c2481452d7c2aa88aeb1e"},"schema_version":"1.0","source":{"id":"1906.04155","kind":"arxiv","version":1}},"canonical_sha256":"5897a47d9bd09bfbea639bbcbd468296abda114e2e937bbea5004c3ffecba48a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5897a47d9bd09bfbea639bbcbd468296abda114e2e937bbea5004c3ffecba48a","first_computed_at":"2026-05-17T23:42:41.427118Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:41.427118Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ed9Dvz8MYK2maWUoVnWay/JsEMRz0slckMLdSmCbi8KyYGqa/f9BrF4YQzXY3tWV007F/ID6WA7aDPQRw3M+BA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:41.427757Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.04155","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:daf36071bb2b21c65925da0e9d6cd718d6e03fc86a67e58356a6d22caaed3dd3","sha256:11b881ab83d832a2ede96bd547d563411feb02388f1b2094c0d2633709c74a6f"],"state_sha256":"fe993cf286293f3d13cc09997766ebf87fd33557737e14268f85468e171f2c92"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aESxY/SCEZYWuC2pKi4UzXXuV/hg7GfwM6sYcFjks72/G5+ElaVqS/AJgpkW82pKASMXyEKVbZhBynIs4dYrCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T20:41:15.405744Z","bundle_sha256":"6e17a7d08e9ee6b68f7531ee23c352aa5b299b4277ceea45a6ef8c4e0cb1e14b"}}