{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:V2DZVOPHMUS75QMYPMAIL2UK2L","short_pith_number":"pith:V2DZVOPH","canonical_record":{"source":{"id":"1908.06911","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-08-19T16:15:22Z","cross_cats_sorted":[],"title_canon_sha256":"e12f62bece95cec3a7ea1db705f6ce31cfcc29b422b55419f1c2854136fa53ca","abstract_canon_sha256":"7875d14a7020968ea05262fcd38bf2ef4e7a10e30bc0febfc29dbca76553750f"},"schema_version":"1.0"},"canonical_sha256":"ae879ab9e76525fec1987b0085ea8ad2db7c5b44fe019fd7207030648959c37a","source":{"kind":"arxiv","id":"1908.06911","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.06911","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"arxiv_version","alias_value":"1908.06911v1","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.06911","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"pith_short_12","alias_value":"V2DZVOPHMUS7","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"pith_short_16","alias_value":"V2DZVOPHMUS75QMY","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"pith_short_8","alias_value":"V2DZVOPH","created_at":"2026-07-04T23:58:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:V2DZVOPHMUS75QMYPMAIL2UK2L","target":"record","payload":{"canonical_record":{"source":{"id":"1908.06911","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-08-19T16:15:22Z","cross_cats_sorted":[],"title_canon_sha256":"e12f62bece95cec3a7ea1db705f6ce31cfcc29b422b55419f1c2854136fa53ca","abstract_canon_sha256":"7875d14a7020968ea05262fcd38bf2ef4e7a10e30bc0febfc29dbca76553750f"},"schema_version":"1.0"},"canonical_sha256":"ae879ab9e76525fec1987b0085ea8ad2db7c5b44fe019fd7207030648959c37a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:58:20.856863Z","signature_b64":"Nms/7mXuRx2pu8eNywCxKFuLPekvkx5sxaKqWieFXbCz1b9TDc43XSdDkYJa5GdoVDnASugn1x7lTeEA2mDxDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ae879ab9e76525fec1987b0085ea8ad2db7c5b44fe019fd7207030648959c37a","last_reissued_at":"2026-07-04T23:58:20.856511Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:58:20.856511Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.06911","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":"2026-07-04T23:58:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DOEMejtDKVpgZ0jmtwr/uhSmiahwrhU8PwVw0IXg4/4DGUPcafzYVOwn0SdCYuVsPbnS4oH/zkL8+PY2mdWtBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T09:54:06.700892Z"},"content_sha256":"ecd177e18752bdecd27d8be4711e0489b375c4129b48e4a0114e8edcc4715d2a","schema_version":"1.0","event_id":"sha256:ecd177e18752bdecd27d8be4711e0489b375c4129b48e4a0114e8edcc4715d2a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:V2DZVOPHMUS75QMYPMAIL2UK2L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Algorithm Selection for Image Quality Assessment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Dietmar Saupe, Hanhe Lin, Markus Wagner, Shujun Li","submitted_at":"2019-08-19T16:15:22Z","abstract_excerpt":"Subjective perceptual image quality can be assessed in lab studies by human observers. Objective image quality assessment (IQA) refers to algorithms for estimation of the mean subjective quality ratings. Many such methods have been proposed, both for blind IQA in which no original reference image is available as well as for the full-reference case. We compared 8 state-of-the-art algorithms for blind IQA and showed that an oracle, able to predict the best performing method for any given input image, yields a hybrid method that could outperform even the best single existing method by a large mar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.06911","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/1908.06911/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":"2026-07-04T23:58:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fDsiztjmmogxzzIV5LvDZsA0L2cflPOcmF9dOV8EjGXSmfWwuZV9Ew6xKV4FiVjs0UOzjA62a2lFnJYXWlUIAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T09:54:06.701462Z"},"content_sha256":"426ee178464b056c83a73a8d9b33630ab1969e9f9d99c008ec5ef2d01dfcaa34","schema_version":"1.0","event_id":"sha256:426ee178464b056c83a73a8d9b33630ab1969e9f9d99c008ec5ef2d01dfcaa34"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V2DZVOPHMUS75QMYPMAIL2UK2L/bundle.json","state_url":"https://pith.science/pith/V2DZVOPHMUS75QMYPMAIL2UK2L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V2DZVOPHMUS75QMYPMAIL2UK2L/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":"2026-08-16T09:54:06Z","links":{"resolver":"https://pith.science/pith/V2DZVOPHMUS75QMYPMAIL2UK2L","bundle":"https://pith.science/pith/V2DZVOPHMUS75QMYPMAIL2UK2L/bundle.json","state":"https://pith.science/pith/V2DZVOPHMUS75QMYPMAIL2UK2L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V2DZVOPHMUS75QMYPMAIL2UK2L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:V2DZVOPHMUS75QMYPMAIL2UK2L","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":"7875d14a7020968ea05262fcd38bf2ef4e7a10e30bc0febfc29dbca76553750f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-08-19T16:15:22Z","title_canon_sha256":"e12f62bece95cec3a7ea1db705f6ce31cfcc29b422b55419f1c2854136fa53ca"},"schema_version":"1.0","source":{"id":"1908.06911","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.06911","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"arxiv_version","alias_value":"1908.06911v1","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.06911","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"pith_short_12","alias_value":"V2DZVOPHMUS7","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"pith_short_16","alias_value":"V2DZVOPHMUS75QMY","created_at":"2026-07-04T23:58:20Z"},{"alias_kind":"pith_short_8","alias_value":"V2DZVOPH","created_at":"2026-07-04T23:58:20Z"}],"graph_snapshots":[{"event_id":"sha256:426ee178464b056c83a73a8d9b33630ab1969e9f9d99c008ec5ef2d01dfcaa34","target":"graph","created_at":"2026-07-04T23:58:20Z","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/1908.06911/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Subjective perceptual image quality can be assessed in lab studies by human observers. Objective image quality assessment (IQA) refers to algorithms for estimation of the mean subjective quality ratings. Many such methods have been proposed, both for blind IQA in which no original reference image is available as well as for the full-reference case. We compared 8 state-of-the-art algorithms for blind IQA and showed that an oracle, able to predict the best performing method for any given input image, yields a hybrid method that could outperform even the best single existing method by a large mar","authors_text":"Dietmar Saupe, Hanhe Lin, Markus Wagner, Shujun Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-08-19T16:15:22Z","title":"Algorithm Selection for Image Quality Assessment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.06911","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:ecd177e18752bdecd27d8be4711e0489b375c4129b48e4a0114e8edcc4715d2a","target":"record","created_at":"2026-07-04T23:58:20Z","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":"7875d14a7020968ea05262fcd38bf2ef4e7a10e30bc0febfc29dbca76553750f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-08-19T16:15:22Z","title_canon_sha256":"e12f62bece95cec3a7ea1db705f6ce31cfcc29b422b55419f1c2854136fa53ca"},"schema_version":"1.0","source":{"id":"1908.06911","kind":"arxiv","version":1}},"canonical_sha256":"ae879ab9e76525fec1987b0085ea8ad2db7c5b44fe019fd7207030648959c37a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ae879ab9e76525fec1987b0085ea8ad2db7c5b44fe019fd7207030648959c37a","first_computed_at":"2026-07-04T23:58:20.856511Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:58:20.856511Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nms/7mXuRx2pu8eNywCxKFuLPekvkx5sxaKqWieFXbCz1b9TDc43XSdDkYJa5GdoVDnASugn1x7lTeEA2mDxDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T23:58:20.856863Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.06911","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ecd177e18752bdecd27d8be4711e0489b375c4129b48e4a0114e8edcc4715d2a","sha256:426ee178464b056c83a73a8d9b33630ab1969e9f9d99c008ec5ef2d01dfcaa34"],"state_sha256":"ec9e92fa61baad99b537259fa186ef6d89ac6b045c41f974acd4fc06063bd44e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xttvymq6DmxArtkvgqfpKc+3jcm/hOaGNNEfWLz3uYTh2EleGHG1FiT/f4RPKxsXZX9TiNd7+m9w5P2PhNC8Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T09:54:06.705909Z","bundle_sha256":"e14a9b82d4ddf677df13f6090faf46d6c019bc0a42b23dc140ed491576515f80"}}