{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:CUPCFRHFCKGK26YRJYTAHSILCF","short_pith_number":"pith:CUPCFRHF","canonical_record":{"source":{"id":"1912.09390","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-12-19T17:06:20Z","cross_cats_sorted":[],"title_canon_sha256":"1d12d827085a502c6dd66a8620b1a7e2c7966d99cef908e5deef0ab2bd07f2cb","abstract_canon_sha256":"60bf30865f6aef45fecc7e75d3a8b0e2e377d0604db61d553ad0a30a8a1bd010"},"schema_version":"1.0"},"canonical_sha256":"151e22c4e5128cad7b114e2603c90b115231b2520cfe295ddcf7b7879b578c76","source":{"kind":"arxiv","id":"1912.09390","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.09390","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"arxiv_version","alias_value":"1912.09390v3","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.09390","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"pith_short_12","alias_value":"CUPCFRHFCKGK","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"pith_short_16","alias_value":"CUPCFRHFCKGK26YR","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"pith_short_8","alias_value":"CUPCFRHF","created_at":"2026-07-05T01:05:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:CUPCFRHFCKGK26YRJYTAHSILCF","target":"record","payload":{"canonical_record":{"source":{"id":"1912.09390","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-12-19T17:06:20Z","cross_cats_sorted":[],"title_canon_sha256":"1d12d827085a502c6dd66a8620b1a7e2c7966d99cef908e5deef0ab2bd07f2cb","abstract_canon_sha256":"60bf30865f6aef45fecc7e75d3a8b0e2e377d0604db61d553ad0a30a8a1bd010"},"schema_version":"1.0"},"canonical_sha256":"151e22c4e5128cad7b114e2603c90b115231b2520cfe295ddcf7b7879b578c76","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:05:00.703900Z","signature_b64":"U9ktjvbk6uJVj14VrDSmlzH1rylobNqxLKMKuBwSmd0Pcf8iRSCr27A5MERM1+rfoudPuBsjOA//MVSrbd7lAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"151e22c4e5128cad7b114e2603c90b115231b2520cfe295ddcf7b7879b578c76","last_reissued_at":"2026-07-05T01:05:00.703404Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:05:00.703404Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1912.09390","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:05:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JfoeL6PSREtes/ump0rurOvTJcXyZ0MtPLMkH0cEoRhAwHa7fGTuODiboEUWWizdjKsErwkopRT9SAE7TeyPCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T11:12:52.658651Z"},"content_sha256":"b1f3e8f2347a7769698a88cf6de80fe3ef5c98313efe9d4e1f7d4cd8d78d1057","schema_version":"1.0","event_id":"sha256:b1f3e8f2347a7769698a88cf6de80fe3ef5c98313efe9d4e1f7d4cd8d78d1057"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:CUPCFRHFCKGK26YRJYTAHSILCF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tangent Images for Mitigating Spherical Distortion","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Jan-Michael Frahm, John Lim, Marc Eder, Mykhailo Shvets","submitted_at":"2019-12-19T17:06:20Z","abstract_excerpt":"In this work, we propose \"tangent images,\" a spherical image representation that facilitates transferable and scalable $360^\\circ$ computer vision. Inspired by techniques in cartography and computer graphics, we render a spherical image to a set of distortion-mitigated, locally-planar image grids tangent to a subdivided icosahedron. By varying the resolution of these grids independently of the subdivision level, we can effectively represent high resolution spherical images while still benefiting from the low-distortion icosahedral spherical approximation. We show that training standard convolu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.09390","kind":"arxiv","version":3},"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/1912.09390/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:05:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5myHiuTz3LVnkgKyM01X1nh4GpXbDW1MjU8UfDgkmcBkJYnVy/oT62VtuS5Ke49VEls605ivaiMIiH6y1QI+Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T11:12:52.659022Z"},"content_sha256":"7ca3e969f5f7c16b1a4ddbe2c15e7d47c6eb2d9b1c06be6ad714f0280717a7ad","schema_version":"1.0","event_id":"sha256:7ca3e969f5f7c16b1a4ddbe2c15e7d47c6eb2d9b1c06be6ad714f0280717a7ad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CUPCFRHFCKGK26YRJYTAHSILCF/bundle.json","state_url":"https://pith.science/pith/CUPCFRHFCKGK26YRJYTAHSILCF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CUPCFRHFCKGK26YRJYTAHSILCF/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":"2026-07-10T11:12:52Z","links":{"resolver":"https://pith.science/pith/CUPCFRHFCKGK26YRJYTAHSILCF","bundle":"https://pith.science/pith/CUPCFRHFCKGK26YRJYTAHSILCF/bundle.json","state":"https://pith.science/pith/CUPCFRHFCKGK26YRJYTAHSILCF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CUPCFRHFCKGK26YRJYTAHSILCF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:CUPCFRHFCKGK26YRJYTAHSILCF","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":"60bf30865f6aef45fecc7e75d3a8b0e2e377d0604db61d553ad0a30a8a1bd010","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-12-19T17:06:20Z","title_canon_sha256":"1d12d827085a502c6dd66a8620b1a7e2c7966d99cef908e5deef0ab2bd07f2cb"},"schema_version":"1.0","source":{"id":"1912.09390","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.09390","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"arxiv_version","alias_value":"1912.09390v3","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.09390","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"pith_short_12","alias_value":"CUPCFRHFCKGK","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"pith_short_16","alias_value":"CUPCFRHFCKGK26YR","created_at":"2026-07-05T01:05:00Z"},{"alias_kind":"pith_short_8","alias_value":"CUPCFRHF","created_at":"2026-07-05T01:05:00Z"}],"graph_snapshots":[{"event_id":"sha256:7ca3e969f5f7c16b1a4ddbe2c15e7d47c6eb2d9b1c06be6ad714f0280717a7ad","target":"graph","created_at":"2026-07-05T01:05:00Z","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/1912.09390/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this work, we propose \"tangent images,\" a spherical image representation that facilitates transferable and scalable $360^\\circ$ computer vision. Inspired by techniques in cartography and computer graphics, we render a spherical image to a set of distortion-mitigated, locally-planar image grids tangent to a subdivided icosahedron. By varying the resolution of these grids independently of the subdivision level, we can effectively represent high resolution spherical images while still benefiting from the low-distortion icosahedral spherical approximation. We show that training standard convolu","authors_text":"Jan-Michael Frahm, John Lim, Marc Eder, Mykhailo Shvets","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-12-19T17:06:20Z","title":"Tangent Images for Mitigating Spherical Distortion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.09390","kind":"arxiv","version":3},"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:b1f3e8f2347a7769698a88cf6de80fe3ef5c98313efe9d4e1f7d4cd8d78d1057","target":"record","created_at":"2026-07-05T01:05:00Z","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":"60bf30865f6aef45fecc7e75d3a8b0e2e377d0604db61d553ad0a30a8a1bd010","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-12-19T17:06:20Z","title_canon_sha256":"1d12d827085a502c6dd66a8620b1a7e2c7966d99cef908e5deef0ab2bd07f2cb"},"schema_version":"1.0","source":{"id":"1912.09390","kind":"arxiv","version":3}},"canonical_sha256":"151e22c4e5128cad7b114e2603c90b115231b2520cfe295ddcf7b7879b578c76","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"151e22c4e5128cad7b114e2603c90b115231b2520cfe295ddcf7b7879b578c76","first_computed_at":"2026-07-05T01:05:00.703404Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:05:00.703404Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U9ktjvbk6uJVj14VrDSmlzH1rylobNqxLKMKuBwSmd0Pcf8iRSCr27A5MERM1+rfoudPuBsjOA//MVSrbd7lAg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:05:00.703900Z","signed_message":"canonical_sha256_bytes"},"source_id":"1912.09390","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b1f3e8f2347a7769698a88cf6de80fe3ef5c98313efe9d4e1f7d4cd8d78d1057","sha256:7ca3e969f5f7c16b1a4ddbe2c15e7d47c6eb2d9b1c06be6ad714f0280717a7ad"],"state_sha256":"806de9f63e7da53888cc490e4fefb83df5fdd2352f51deb0095ef901333e07b9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l9KwS4gyKhTBr0UYhTdyEyo2LsmRkGcrOAiZ/rTByVhc8ShAq2ntiyXdKetLsH6m21PmhSaJTZRee0JuZXGBAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-10T11:12:52.660951Z","bundle_sha256":"592fd9aed7106f5720bf761b9365ebc960f7daa87f9647ab3880e6da621167ad"}}