{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:QTSH7M6OJRSNZOFI4DKGASQNBH","short_pith_number":"pith:QTSH7M6O","canonical_record":{"source":{"id":"1810.01641","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-03T09:07:28Z","cross_cats_sorted":[],"title_canon_sha256":"d69cf67537bf388e45bf27472e36fdb8199fceae54c07d6004d37793556c1272","abstract_canon_sha256":"8a44b178317cf4fa92b5105e5829f410f16709c19096573dbdb7ab2b8041570c"},"schema_version":"1.0"},"canonical_sha256":"84e47fb3ce4c64dcb8a8e0d4604a0d09ef39144f18364cca55059c58f7247e5e","source":{"kind":"arxiv","id":"1810.01641","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.01641","created_at":"2026-05-18T00:04:11Z"},{"alias_kind":"arxiv_version","alias_value":"1810.01641v1","created_at":"2026-05-18T00:04:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.01641","created_at":"2026-05-18T00:04:11Z"},{"alias_kind":"pith_short_12","alias_value":"QTSH7M6OJRSN","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"QTSH7M6OJRSNZOFI","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"QTSH7M6O","created_at":"2026-05-18T12:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:QTSH7M6OJRSNZOFI4DKGASQNBH","target":"record","payload":{"canonical_record":{"source":{"id":"1810.01641","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-03T09:07:28Z","cross_cats_sorted":[],"title_canon_sha256":"d69cf67537bf388e45bf27472e36fdb8199fceae54c07d6004d37793556c1272","abstract_canon_sha256":"8a44b178317cf4fa92b5105e5829f410f16709c19096573dbdb7ab2b8041570c"},"schema_version":"1.0"},"canonical_sha256":"84e47fb3ce4c64dcb8a8e0d4604a0d09ef39144f18364cca55059c58f7247e5e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:04:11.383798Z","signature_b64":"oAkLIs6erKAsgbYU9dRCMwnuorXt8t0yZn/znnQkwhNwyuyCMXSsXngU7tj+ikty08CgymqIVGTwmII5xMYEBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"84e47fb3ce4c64dcb8a8e0d4604a0d09ef39144f18364cca55059c58f7247e5e","last_reissued_at":"2026-05-18T00:04:11.383091Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:04:11.383091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1810.01641","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":"2026-05-18T00:04:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VxiWhkvpsiVUvCVH8vWECNInlLQ66x1qQMLhvQ3XLkgc/BVI5QmUO7rMXko+IaPIrR/6Rit0i/TZos6JaDZbBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T17:11:09.613241Z"},"content_sha256":"6b397d2421ce9df1d3ba0734eeffc63cfcbc5ed7e987228eb96db75d1c8f2ac5","schema_version":"1.0","event_id":"sha256:6b397d2421ce9df1d3ba0734eeffc63cfcbc5ed7e987228eb96db75d1c8f2ac5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:QTSH7M6OJRSNZOFI4DKGASQNBH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"PIRM Challenge on Perceptual Image Enhancement on Smartphones: Report","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Andrey Ignatov, A. N. Rajagopalan, Cao Van Nguyen, Chao Dong, Chen Xing, Cheolkon Jung, Eirikur Agustsson, Etienne de Stoutz, Gen Li, Hu Fengshuo, Jae-Seok Choi, Jie Huang, Jie Liu, Jiewen Ran, Jinghui Qin, Kehui Nie, Liang Lin, Lirui Deng, Liu Hanwen, Luc Van Gool, Mingrui Geng, Munchurl Kim, Nikolay Kobyshev, Nimisha Thekke Madam, Pablo Navarrete Michelini, Pengfei Zhu, Praveen Kandula, Qinquan Gao, Radu Timofte, Rang Meng, Ruicheng Feng, Shixiang Wu, Shuhang Gu, Subeesh Vasu, Thang Van Vu, Tong Tong, Trung X Pham, Tung Minh Luu, Wushao Wen, Xingguang Zhou, Xiumei Wang, Yan Zhao, Yawei Li, Yongwoo Kim, Yukai Shi, Yu Qiao, Zheng Hui, Zhu Dan","submitted_at":"2018-10-03T09:07:28Z","abstract_excerpt":"This paper reviews the first challenge on efficient perceptual image enhancement with the focus on deploying deep learning models on smartphones. The challenge consisted of two tracks. In the first one, participants were solving the classical image super-resolution problem with a bicubic downscaling factor of 4. The second track was aimed at real-world photo enhancement, and the goal was to map low-quality photos from the iPhone 3GS device to the same photos captured with a DSLR camera. The target metric used in this challenge combined the runtime, PSNR scores and solutions' perceptual results"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.01641","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":""},"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":"2026-05-18T00:04:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GuYLGSkLdMeAJpTLDf0e8mxJdxVXfiPYUDsxuxU4te6MVeIgnm9wUNJz/lu0XOqGBvjBEVTXOgR+B5UjS51qBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T17:11:09.613897Z"},"content_sha256":"15d333f9922c6cf4542670f4323e3068a54bab50b702ba7ee02a6845cdd904ce","schema_version":"1.0","event_id":"sha256:15d333f9922c6cf4542670f4323e3068a54bab50b702ba7ee02a6845cdd904ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QTSH7M6OJRSNZOFI4DKGASQNBH/bundle.json","state_url":"https://pith.science/pith/QTSH7M6OJRSNZOFI4DKGASQNBH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QTSH7M6OJRSNZOFI4DKGASQNBH/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":"2026-06-02T17:11:09Z","links":{"resolver":"https://pith.science/pith/QTSH7M6OJRSNZOFI4DKGASQNBH","bundle":"https://pith.science/pith/QTSH7M6OJRSNZOFI4DKGASQNBH/bundle.json","state":"https://pith.science/pith/QTSH7M6OJRSNZOFI4DKGASQNBH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QTSH7M6OJRSNZOFI4DKGASQNBH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:QTSH7M6OJRSNZOFI4DKGASQNBH","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":"8a44b178317cf4fa92b5105e5829f410f16709c19096573dbdb7ab2b8041570c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-03T09:07:28Z","title_canon_sha256":"d69cf67537bf388e45bf27472e36fdb8199fceae54c07d6004d37793556c1272"},"schema_version":"1.0","source":{"id":"1810.01641","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.01641","created_at":"2026-05-18T00:04:11Z"},{"alias_kind":"arxiv_version","alias_value":"1810.01641v1","created_at":"2026-05-18T00:04:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.01641","created_at":"2026-05-18T00:04:11Z"},{"alias_kind":"pith_short_12","alias_value":"QTSH7M6OJRSN","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"QTSH7M6OJRSNZOFI","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"QTSH7M6O","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:15d333f9922c6cf4542670f4323e3068a54bab50b702ba7ee02a6845cdd904ce","target":"graph","created_at":"2026-05-18T00:04:11Z","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":"This paper reviews the first challenge on efficient perceptual image enhancement with the focus on deploying deep learning models on smartphones. The challenge consisted of two tracks. In the first one, participants were solving the classical image super-resolution problem with a bicubic downscaling factor of 4. The second track was aimed at real-world photo enhancement, and the goal was to map low-quality photos from the iPhone 3GS device to the same photos captured with a DSLR camera. The target metric used in this challenge combined the runtime, PSNR scores and solutions' perceptual results","authors_text":"Andrey Ignatov, A. N. Rajagopalan, Cao Van Nguyen, Chao Dong, Chen Xing, Cheolkon Jung, Eirikur Agustsson, Etienne de Stoutz, Gen Li, Hu Fengshuo, Jae-Seok Choi, Jie Huang, Jie Liu, Jiewen Ran, Jinghui Qin, Kehui Nie, Liang Lin, Lirui Deng, Liu Hanwen, Luc Van Gool, Mingrui Geng, Munchurl Kim, Nikolay Kobyshev, Nimisha Thekke Madam, Pablo Navarrete Michelini, Pengfei Zhu, Praveen Kandula, Qinquan Gao, Radu Timofte, Rang Meng, Ruicheng Feng, Shixiang Wu, Shuhang Gu, Subeesh Vasu, Thang Van Vu, Tong Tong, Trung X Pham, Tung Minh Luu, Wushao Wen, Xingguang Zhou, Xiumei Wang, Yan Zhao, Yawei Li, Yongwoo Kim, Yukai Shi, Yu Qiao, Zheng Hui, Zhu Dan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-03T09:07:28Z","title":"PIRM Challenge on Perceptual Image Enhancement on Smartphones: Report"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.01641","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":"sha256:6b397d2421ce9df1d3ba0734eeffc63cfcbc5ed7e987228eb96db75d1c8f2ac5","target":"record","created_at":"2026-05-18T00:04:11Z","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":"8a44b178317cf4fa92b5105e5829f410f16709c19096573dbdb7ab2b8041570c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-10-03T09:07:28Z","title_canon_sha256":"d69cf67537bf388e45bf27472e36fdb8199fceae54c07d6004d37793556c1272"},"schema_version":"1.0","source":{"id":"1810.01641","kind":"arxiv","version":1}},"canonical_sha256":"84e47fb3ce4c64dcb8a8e0d4604a0d09ef39144f18364cca55059c58f7247e5e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"84e47fb3ce4c64dcb8a8e0d4604a0d09ef39144f18364cca55059c58f7247e5e","first_computed_at":"2026-05-18T00:04:11.383091Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:04:11.383091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oAkLIs6erKAsgbYU9dRCMwnuorXt8t0yZn/znnQkwhNwyuyCMXSsXngU7tj+ikty08CgymqIVGTwmII5xMYEBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:04:11.383798Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.01641","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6b397d2421ce9df1d3ba0734eeffc63cfcbc5ed7e987228eb96db75d1c8f2ac5","sha256:15d333f9922c6cf4542670f4323e3068a54bab50b702ba7ee02a6845cdd904ce"],"state_sha256":"997e12df265f1d6628611b811419b82d756062c9e049eb51059d41ffa4954944"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/GMzjCqs+j1AD+dpM/BHHD6Q0EG98A1JROXQHVyroOjJls8gMLkImPnbK2vF5ubMQgr+nTiAyrOUpRj5QLi7CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T17:11:09.618350Z","bundle_sha256":"d979b9c464760e978f3f06eafd1898b06f06a84f3ab1dc714ca2c2fba0bb35e0"}}