{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:TBTJGOGXTXWNN2A3AQ5QWULHTU","short_pith_number":"pith:TBTJGOGX","canonical_record":{"source":{"id":"2503.11883","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-03-14T21:15:14Z","cross_cats_sorted":[],"title_canon_sha256":"1bac78c862831a1e0d1d72c39192dc2118b1571daff6d796f86e86e3a409ac68","abstract_canon_sha256":"fc678e3944561eb4dab4504b9e2a604a0336b72806d3a48a51c2bcfe61a641ab"},"schema_version":"1.0"},"canonical_sha256":"98669338d79decd6e81b043b0b51679d130d0ff4ab79210063cad3fa3e48eaa3","source":{"kind":"arxiv","id":"2503.11883","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.11883","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"arxiv_version","alias_value":"2503.11883v1","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.11883","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"pith_short_12","alias_value":"TBTJGOGXTXWN","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"pith_short_16","alias_value":"TBTJGOGXTXWNN2A3","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"pith_short_8","alias_value":"TBTJGOGX","created_at":"2026-07-05T10:32:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:TBTJGOGXTXWNN2A3AQ5QWULHTU","target":"record","payload":{"canonical_record":{"source":{"id":"2503.11883","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-03-14T21:15:14Z","cross_cats_sorted":[],"title_canon_sha256":"1bac78c862831a1e0d1d72c39192dc2118b1571daff6d796f86e86e3a409ac68","abstract_canon_sha256":"fc678e3944561eb4dab4504b9e2a604a0336b72806d3a48a51c2bcfe61a641ab"},"schema_version":"1.0"},"canonical_sha256":"98669338d79decd6e81b043b0b51679d130d0ff4ab79210063cad3fa3e48eaa3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:32:01.508676Z","signature_b64":"CjG4wzHNk54iRPSvL/XHjCBziHXYlwU27bnJeOMRhZN5LWquBL9OjiIHRPdaPc9QZry7PjrC/f3PXqLeo8R9DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"98669338d79decd6e81b043b0b51679d130d0ff4ab79210063cad3fa3e48eaa3","last_reissued_at":"2026-07-05T10:32:01.508181Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:32:01.508181Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2503.11883","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":"2026-07-05T10:32:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YbbyHDgQmJatah7N0NLyvfyjim9LxdFvZbFOC1G0NnOuyhlAKh664QBANLYyO2lk7RctWGrP4FdH3qBkDvTtDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T14:45:16.235163Z"},"content_sha256":"1a6c275b67436c03ec84909e77106a349c0ce1b6e6bd4380dfa285d74bd78881","schema_version":"1.0","event_id":"sha256:1a6c275b67436c03ec84909e77106a349c0ce1b6e6bd4380dfa285d74bd78881"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:TBTJGOGXTXWNN2A3AQ5QWULHTU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gain-MLP: Improving HDR Gain Map Encoding via a Lightweight MLP","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.IV","authors_text":"Michael J. Murdoch, Michael S. Brown, SaiKiran Tedla, Trevor D. Canham","submitted_at":"2025-03-14T21:15:14Z","abstract_excerpt":"While most images shared on the web and social media platforms are encoded in standard dynamic range (SDR), many displays now can accommodate high dynamic range (HDR) content. Additionally, modern cameras can capture images in an HDR format but convert them to SDR to ensure maximum compatibility with existing workflows and legacy displays. To support both SDR and HDR, new encoding formats are emerging that store additional metadata in SDR images in the form of a gain map. When applied to the SDR image, the gain map recovers the HDR version of the image as needed. These gain maps, however, are "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.11883","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/2503.11883/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":"2026-07-05T10:32:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yxpKZPGAqKccDvkyqg3Z9qDFxjsQIxe5ztjTKPlRUL+zasq355a+AEdT/jJoYbxYalj4m+EgfF8PHMMTxc0ZAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T14:45:16.235758Z"},"content_sha256":"e32031b22ff422323920fb5d57dd67094b36d4bd9cb8be50a9569c87aebcaf3c","schema_version":"1.0","event_id":"sha256:e32031b22ff422323920fb5d57dd67094b36d4bd9cb8be50a9569c87aebcaf3c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TBTJGOGXTXWNN2A3AQ5QWULHTU/bundle.json","state_url":"https://pith.science/pith/TBTJGOGXTXWNN2A3AQ5QWULHTU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TBTJGOGXTXWNN2A3AQ5QWULHTU/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":"2026-08-20T14:45:16Z","links":{"resolver":"https://pith.science/pith/TBTJGOGXTXWNN2A3AQ5QWULHTU","bundle":"https://pith.science/pith/TBTJGOGXTXWNN2A3AQ5QWULHTU/bundle.json","state":"https://pith.science/pith/TBTJGOGXTXWNN2A3AQ5QWULHTU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TBTJGOGXTXWNN2A3AQ5QWULHTU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:TBTJGOGXTXWNN2A3AQ5QWULHTU","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":"fc678e3944561eb4dab4504b9e2a604a0336b72806d3a48a51c2bcfe61a641ab","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-03-14T21:15:14Z","title_canon_sha256":"1bac78c862831a1e0d1d72c39192dc2118b1571daff6d796f86e86e3a409ac68"},"schema_version":"1.0","source":{"id":"2503.11883","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.11883","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"arxiv_version","alias_value":"2503.11883v1","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.11883","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"pith_short_12","alias_value":"TBTJGOGXTXWN","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"pith_short_16","alias_value":"TBTJGOGXTXWNN2A3","created_at":"2026-07-05T10:32:01Z"},{"alias_kind":"pith_short_8","alias_value":"TBTJGOGX","created_at":"2026-07-05T10:32:01Z"}],"graph_snapshots":[{"event_id":"sha256:e32031b22ff422323920fb5d57dd67094b36d4bd9cb8be50a9569c87aebcaf3c","target":"graph","created_at":"2026-07-05T10:32:01Z","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/2503.11883/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"While most images shared on the web and social media platforms are encoded in standard dynamic range (SDR), many displays now can accommodate high dynamic range (HDR) content. Additionally, modern cameras can capture images in an HDR format but convert them to SDR to ensure maximum compatibility with existing workflows and legacy displays. To support both SDR and HDR, new encoding formats are emerging that store additional metadata in SDR images in the form of a gain map. When applied to the SDR image, the gain map recovers the HDR version of the image as needed. These gain maps, however, are ","authors_text":"Michael J. Murdoch, Michael S. Brown, SaiKiran Tedla, Trevor D. Canham","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-03-14T21:15:14Z","title":"Gain-MLP: Improving HDR Gain Map Encoding via a Lightweight MLP"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.11883","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":"sha256:1a6c275b67436c03ec84909e77106a349c0ce1b6e6bd4380dfa285d74bd78881","target":"record","created_at":"2026-07-05T10:32:01Z","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":"fc678e3944561eb4dab4504b9e2a604a0336b72806d3a48a51c2bcfe61a641ab","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-03-14T21:15:14Z","title_canon_sha256":"1bac78c862831a1e0d1d72c39192dc2118b1571daff6d796f86e86e3a409ac68"},"schema_version":"1.0","source":{"id":"2503.11883","kind":"arxiv","version":1}},"canonical_sha256":"98669338d79decd6e81b043b0b51679d130d0ff4ab79210063cad3fa3e48eaa3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"98669338d79decd6e81b043b0b51679d130d0ff4ab79210063cad3fa3e48eaa3","first_computed_at":"2026-07-05T10:32:01.508181Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:32:01.508181Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CjG4wzHNk54iRPSvL/XHjCBziHXYlwU27bnJeOMRhZN5LWquBL9OjiIHRPdaPc9QZry7PjrC/f3PXqLeo8R9DQ==","signature_status":"signed_v1","signed_at":"2026-07-05T10:32:01.508676Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.11883","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a6c275b67436c03ec84909e77106a349c0ce1b6e6bd4380dfa285d74bd78881","sha256:e32031b22ff422323920fb5d57dd67094b36d4bd9cb8be50a9569c87aebcaf3c"],"state_sha256":"8326cf3086fef20873e3367e5ee599eb1a51209a47311eecd1e51f28e914a2c4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eIOg56OYDQ7a6HaUrXKoKKRxjhQAiXzyMgIoB4r5qOHMDzEpezWc8coeZ71oa9YdS6YEDDe6oExs5oPfHjkADA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T14:45:16.245540Z","bundle_sha256":"456182014e038b3fa750fa8e55c7fdda2fdfcb4bdeda86e7360094300ee60185"}}