{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:I5ETVR7ZB6WVMQEDX5NUTWK2VH","short_pith_number":"pith:I5ETVR7Z","canonical_record":{"source":{"id":"2105.13084","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-05-27T12:12:34Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"f9288c8d1d293fd6838e8097f7b9bd7acad9afb4fb2985e47873d5e114e64fd2","abstract_canon_sha256":"c187f943952597d169bd5a7309f7e3c74cd48c9666181dd51a3c6f679914db06"},"schema_version":"1.0"},"canonical_sha256":"47493ac7f90fad564083bf5b49d95aa9cabe98c786ffdc38fa0ab0c7ce6e4306","source":{"kind":"arxiv","id":"2105.13084","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.13084","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"arxiv_version","alias_value":"2105.13084v2","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.13084","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"pith_short_12","alias_value":"I5ETVR7ZB6WV","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"pith_short_16","alias_value":"I5ETVR7ZB6WVMQED","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"pith_short_8","alias_value":"I5ETVR7Z","created_at":"2026-07-05T02:50:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:I5ETVR7ZB6WVMQEDX5NUTWK2VH","target":"record","payload":{"canonical_record":{"source":{"id":"2105.13084","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-05-27T12:12:34Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"f9288c8d1d293fd6838e8097f7b9bd7acad9afb4fb2985e47873d5e114e64fd2","abstract_canon_sha256":"c187f943952597d169bd5a7309f7e3c74cd48c9666181dd51a3c6f679914db06"},"schema_version":"1.0"},"canonical_sha256":"47493ac7f90fad564083bf5b49d95aa9cabe98c786ffdc38fa0ab0c7ce6e4306","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:50:46.694945Z","signature_b64":"QZApYencTM7b5CWtiV5CwFg10AoGSzscpG+ogv7taRr3gXmfjmts5slLDSvxZeKA+Z8La7xeXcciKv0BzU57Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"47493ac7f90fad564083bf5b49d95aa9cabe98c786ffdc38fa0ab0c7ce6e4306","last_reissued_at":"2026-07-05T02:50:46.694577Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:50:46.694577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.13084","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":"2026-07-05T02:50:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B0+UHIpBguteML0Cs7rEuzP4YAYnm5mTK9PI9QVZ2tOSHiTSkU7ubKoaDFFFMAYrpRkwewid0FjOGCsg4DCmAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T12:02:23.458921Z"},"content_sha256":"89ebf7378ceda0341854eecf3938f8323e9c012a9e760c5a13af356284333662","schema_version":"1.0","event_id":"sha256:89ebf7378ceda0341854eecf3938f8323e9c012a9e760c5a13af356284333662"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:I5ETVR7ZB6WVMQEDX5NUTWK2VH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"HDRUNet: Single Image HDR Reconstruction with Denoising and Dequantization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"eess.IV","authors_text":"Chao Dong, Xiangyu Chen, Yihao Liu, Yu Qiao, Zhengwen Zhang","submitted_at":"2021-05-27T12:12:34Z","abstract_excerpt":"Most consumer-grade digital cameras can only capture a limited range of luminance in real-world scenes due to sensor constraints. Besides, noise and quantization errors are often introduced in the imaging process. In order to obtain high dynamic range (HDR) images with excellent visual quality, the most common solution is to combine multiple images with different exposures. However, it is not always feasible to obtain multiple images of the same scene and most HDR reconstruction methods ignore the noise and quantization loss. In this work, we propose a novel learning-based approach using a spa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.13084","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2105.13084/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":"2026-07-05T02:50:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wOI9JpoV4xpZnE/m6NAo3KiyfTtoxU4sS6O/eI+Ee5LJPgNn8JMtrGOqVXcBQ7iJxdlKANyjWKOWNYxSHv7JAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T12:02:23.459754Z"},"content_sha256":"7d1fc9120e84e735045483aa3e8342ba237b451a498b06681ea8718e1677a077","schema_version":"1.0","event_id":"sha256:7d1fc9120e84e735045483aa3e8342ba237b451a498b06681ea8718e1677a077"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I5ETVR7ZB6WVMQEDX5NUTWK2VH/bundle.json","state_url":"https://pith.science/pith/I5ETVR7ZB6WVMQEDX5NUTWK2VH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I5ETVR7ZB6WVMQEDX5NUTWK2VH/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":"2026-08-04T12:02:23Z","links":{"resolver":"https://pith.science/pith/I5ETVR7ZB6WVMQEDX5NUTWK2VH","bundle":"https://pith.science/pith/I5ETVR7ZB6WVMQEDX5NUTWK2VH/bundle.json","state":"https://pith.science/pith/I5ETVR7ZB6WVMQEDX5NUTWK2VH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I5ETVR7ZB6WVMQEDX5NUTWK2VH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:I5ETVR7ZB6WVMQEDX5NUTWK2VH","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":"c187f943952597d169bd5a7309f7e3c74cd48c9666181dd51a3c6f679914db06","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-05-27T12:12:34Z","title_canon_sha256":"f9288c8d1d293fd6838e8097f7b9bd7acad9afb4fb2985e47873d5e114e64fd2"},"schema_version":"1.0","source":{"id":"2105.13084","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.13084","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"arxiv_version","alias_value":"2105.13084v2","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.13084","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"pith_short_12","alias_value":"I5ETVR7ZB6WV","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"pith_short_16","alias_value":"I5ETVR7ZB6WVMQED","created_at":"2026-07-05T02:50:46Z"},{"alias_kind":"pith_short_8","alias_value":"I5ETVR7Z","created_at":"2026-07-05T02:50:46Z"}],"graph_snapshots":[{"event_id":"sha256:7d1fc9120e84e735045483aa3e8342ba237b451a498b06681ea8718e1677a077","target":"graph","created_at":"2026-07-05T02:50:46Z","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/2105.13084/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Most consumer-grade digital cameras can only capture a limited range of luminance in real-world scenes due to sensor constraints. Besides, noise and quantization errors are often introduced in the imaging process. In order to obtain high dynamic range (HDR) images with excellent visual quality, the most common solution is to combine multiple images with different exposures. However, it is not always feasible to obtain multiple images of the same scene and most HDR reconstruction methods ignore the noise and quantization loss. In this work, we propose a novel learning-based approach using a spa","authors_text":"Chao Dong, Xiangyu Chen, Yihao Liu, Yu Qiao, Zhengwen Zhang","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-05-27T12:12:34Z","title":"HDRUNet: Single Image HDR Reconstruction with Denoising and Dequantization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.13084","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":"sha256:89ebf7378ceda0341854eecf3938f8323e9c012a9e760c5a13af356284333662","target":"record","created_at":"2026-07-05T02:50:46Z","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":"c187f943952597d169bd5a7309f7e3c74cd48c9666181dd51a3c6f679914db06","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2021-05-27T12:12:34Z","title_canon_sha256":"f9288c8d1d293fd6838e8097f7b9bd7acad9afb4fb2985e47873d5e114e64fd2"},"schema_version":"1.0","source":{"id":"2105.13084","kind":"arxiv","version":2}},"canonical_sha256":"47493ac7f90fad564083bf5b49d95aa9cabe98c786ffdc38fa0ab0c7ce6e4306","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"47493ac7f90fad564083bf5b49d95aa9cabe98c786ffdc38fa0ab0c7ce6e4306","first_computed_at":"2026-07-05T02:50:46.694577Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:50:46.694577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QZApYencTM7b5CWtiV5CwFg10AoGSzscpG+ogv7taRr3gXmfjmts5slLDSvxZeKA+Z8La7xeXcciKv0BzU57Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T02:50:46.694945Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.13084","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:89ebf7378ceda0341854eecf3938f8323e9c012a9e760c5a13af356284333662","sha256:7d1fc9120e84e735045483aa3e8342ba237b451a498b06681ea8718e1677a077"],"state_sha256":"f2e266d508cd36b29defa1a7d435d89e6fadb966264321791bb9c1b7fc22f15b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G+8/Cwgyur9lUUWv8/7NfFj35eQWKzOOR4SLOH0BPTiLnhyjx4iGwXqvt3Jo5p8N/sqaX5Sw5QjRjr27C0dGAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T12:02:23.465894Z","bundle_sha256":"0545c39b265d5ab9a87b5b1649aa57e0e9f6877ecc5f06040c82bd0885d5ee23"}}