{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:YUUFOW3WVGPB6YR77ZYCWJDSV7","short_pith_number":"pith:YUUFOW3W","canonical_record":{"source":{"id":"1812.11163","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2018-12-28T18:50:40Z","cross_cats_sorted":[],"title_canon_sha256":"7c74b788bf93d6d53f17c187eaeade866fdc21c78f3d308d72f2b3cb3cd0c23c","abstract_canon_sha256":"91461828115b0b84b42e5c4703842d13ad25bce7f88c036bdf53006b61c8f8d3"},"schema_version":"1.0"},"canonical_sha256":"c528575b76a99e1f623ffe702b2472afe715c9987b9a2431e8bda3d46a20d4df","source":{"kind":"arxiv","id":"1812.11163","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.11163","created_at":"2026-05-17T23:52:38Z"},{"alias_kind":"arxiv_version","alias_value":"1812.11163v3","created_at":"2026-05-17T23:52:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.11163","created_at":"2026-05-17T23:52:38Z"},{"alias_kind":"pith_short_12","alias_value":"YUUFOW3WVGPB","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YUUFOW3WVGPB6YR7","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YUUFOW3W","created_at":"2026-05-18T12:33:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:YUUFOW3WVGPB6YR77ZYCWJDSV7","target":"record","payload":{"canonical_record":{"source":{"id":"1812.11163","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2018-12-28T18:50:40Z","cross_cats_sorted":[],"title_canon_sha256":"7c74b788bf93d6d53f17c187eaeade866fdc21c78f3d308d72f2b3cb3cd0c23c","abstract_canon_sha256":"91461828115b0b84b42e5c4703842d13ad25bce7f88c036bdf53006b61c8f8d3"},"schema_version":"1.0"},"canonical_sha256":"c528575b76a99e1f623ffe702b2472afe715c9987b9a2431e8bda3d46a20d4df","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:38.889738Z","signature_b64":"/a2yreZz6fJ2EzR/ac33el52vN61Vsj5frFSALf5zHFr9uAaJQfuDnL14EZ3SlBfwoC1TU31FUtEGL966V86BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c528575b76a99e1f623ffe702b2472afe715c9987b9a2431e8bda3d46a20d4df","last_reissued_at":"2026-05-17T23:52:38.889015Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:38.889015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.11163","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":"2026-05-17T23:52:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A6OeDgpNmSsgAr7CEnCq0XTQ9a/mbXneAvRnrp08nF94Y1aC0VsKfl4nOEqjeHmu7lS4OnktC2bCgI+Yvsa2DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T12:16:34.402065Z"},"content_sha256":"672cdf740e9336ae2bc3dd494ae74b80542704d0738f7304b0d58be0cad13f62","schema_version":"1.0","event_id":"sha256:672cdf740e9336ae2bc3dd494ae74b80542704d0738f7304b0d58be0cad13f62"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:YUUFOW3WVGPB6YR77ZYCWJDSV7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Center Emphasized Visual Saliency and a Contrast-based Full Reference Image Quality Index","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Eui-Nam Huh, Md Abu Layek, Sanjida Afroz, TaeChoong Chung","submitted_at":"2018-12-28T18:50:40Z","abstract_excerpt":"Objective image quality assessment (IQA) is imperative in the current multimedia-intensive world, in order to assess the visual quality of an image at close to a human level of ability. Many~parameters such as color intensity, structure, sharpness, contrast, presence of an object, etc., draw human attention to an image. Psychological vision research suggests that human vision is biased to the center area of an image and display screen. As a result, if the center part contains any visually salient information, it draws human attention even more and any distortion in that part will be better per"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.11163","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":""},"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":"2026-05-17T23:52:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Sh8FJ5nH1RDKLdAad8m/Nb+Ti41m3LwuLtun79Kdz9oyL0V4GIIQkaHoUdk6FXn5eWMAbI7zpc+21rvbZ88sDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T12:16:34.402638Z"},"content_sha256":"58effe0506b61a84c021140d62b1a5b40d416b897545336395478639d28c783e","schema_version":"1.0","event_id":"sha256:58effe0506b61a84c021140d62b1a5b40d416b897545336395478639d28c783e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YUUFOW3WVGPB6YR77ZYCWJDSV7/bundle.json","state_url":"https://pith.science/pith/YUUFOW3WVGPB6YR77ZYCWJDSV7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YUUFOW3WVGPB6YR77ZYCWJDSV7/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":"2026-05-23T12:16:34Z","links":{"resolver":"https://pith.science/pith/YUUFOW3WVGPB6YR77ZYCWJDSV7","bundle":"https://pith.science/pith/YUUFOW3WVGPB6YR77ZYCWJDSV7/bundle.json","state":"https://pith.science/pith/YUUFOW3WVGPB6YR77ZYCWJDSV7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YUUFOW3WVGPB6YR77ZYCWJDSV7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:YUUFOW3WVGPB6YR77ZYCWJDSV7","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":"91461828115b0b84b42e5c4703842d13ad25bce7f88c036bdf53006b61c8f8d3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2018-12-28T18:50:40Z","title_canon_sha256":"7c74b788bf93d6d53f17c187eaeade866fdc21c78f3d308d72f2b3cb3cd0c23c"},"schema_version":"1.0","source":{"id":"1812.11163","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.11163","created_at":"2026-05-17T23:52:38Z"},{"alias_kind":"arxiv_version","alias_value":"1812.11163v3","created_at":"2026-05-17T23:52:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.11163","created_at":"2026-05-17T23:52:38Z"},{"alias_kind":"pith_short_12","alias_value":"YUUFOW3WVGPB","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"YUUFOW3WVGPB6YR7","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"YUUFOW3W","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:58effe0506b61a84c021140d62b1a5b40d416b897545336395478639d28c783e","target":"graph","created_at":"2026-05-17T23:52:38Z","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":"Objective image quality assessment (IQA) is imperative in the current multimedia-intensive world, in order to assess the visual quality of an image at close to a human level of ability. Many~parameters such as color intensity, structure, sharpness, contrast, presence of an object, etc., draw human attention to an image. Psychological vision research suggests that human vision is biased to the center area of an image and display screen. As a result, if the center part contains any visually salient information, it draws human attention even more and any distortion in that part will be better per","authors_text":"Eui-Nam Huh, Md Abu Layek, Sanjida Afroz, TaeChoong Chung","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2018-12-28T18:50:40Z","title":"Center Emphasized Visual Saliency and a Contrast-based Full Reference Image Quality Index"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.11163","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":"sha256:672cdf740e9336ae2bc3dd494ae74b80542704d0738f7304b0d58be0cad13f62","target":"record","created_at":"2026-05-17T23:52:38Z","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":"91461828115b0b84b42e5c4703842d13ad25bce7f88c036bdf53006b61c8f8d3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2018-12-28T18:50:40Z","title_canon_sha256":"7c74b788bf93d6d53f17c187eaeade866fdc21c78f3d308d72f2b3cb3cd0c23c"},"schema_version":"1.0","source":{"id":"1812.11163","kind":"arxiv","version":3}},"canonical_sha256":"c528575b76a99e1f623ffe702b2472afe715c9987b9a2431e8bda3d46a20d4df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c528575b76a99e1f623ffe702b2472afe715c9987b9a2431e8bda3d46a20d4df","first_computed_at":"2026-05-17T23:52:38.889015Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:38.889015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/a2yreZz6fJ2EzR/ac33el52vN61Vsj5frFSALf5zHFr9uAaJQfuDnL14EZ3SlBfwoC1TU31FUtEGL966V86BQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:38.889738Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.11163","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:672cdf740e9336ae2bc3dd494ae74b80542704d0738f7304b0d58be0cad13f62","sha256:58effe0506b61a84c021140d62b1a5b40d416b897545336395478639d28c783e"],"state_sha256":"2d903c7a5bbd9acac7f7707d535ab307af83a383e9549f1476470fa72dac9b61"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KYu7kbZLqhRL013h/3hdaeq7o8BAC/ssnCJXPkxqy9M+SVkNmQGjbvopXHWvvcPupVsG+0N9H5ER7sVOryxIDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T12:16:34.407120Z","bundle_sha256":"31d5c7e478c49da7f5de0b58741396282e6fd862a7a186e204c790bc43ac7811"}}