{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:DGVDYAVYVQPSMS7TDY4D7CBH2A","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":"198b372ad7a0f9fd9efc3bdb995c6421596aa7363330e2b0d9561e8ff431acd7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-02-25T08:58:10Z","title_canon_sha256":"4e8f84b48727d56164a5508d4c1d4bf2f7acdbbb890d1373a99d3332032a4daa"},"schema_version":"1.0","source":{"id":"1902.09145","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.09145","created_at":"2026-05-17T23:52:46Z"},{"alias_kind":"arxiv_version","alias_value":"1902.09145v1","created_at":"2026-05-17T23:52:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.09145","created_at":"2026-05-17T23:52:46Z"},{"alias_kind":"pith_short_12","alias_value":"DGVDYAVYVQPS","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"DGVDYAVYVQPSMS7T","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"DGVDYAVY","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:406e9df984f14bd4b1f77246a4a6e2cb78aa79bc612f84ad083747a079bb14ec","target":"graph","created_at":"2026-05-17T23:52:46Z","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"},"paper":{"abstract_excerpt":"We present DDFlow, a data distillation approach to learning optical flow estimation from unlabeled data. The approach distills reliable predictions from a teacher network, and uses these predictions as annotations to guide a student network to learn optical flow. Unlike existing work relying on hand-crafted energy terms to handle occlusion, our approach is data-driven, and learns optical flow for occluded pixels. This enables us to train our model with a much simpler loss function, and achieve a much higher accuracy. We conduct a rigorous evaluation on the challenging Flying Chairs, MPI Sintel","authors_text":"Irwin King, Jia Xu, Michael R.Lyu, Pengpeng Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-02-25T08:58:10Z","title":"DDFlow: Learning Optical Flow with Unlabeled Data Distillation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.09145","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:e5c6302cfbd04e49f402bdbde5673f5fd6e02017f25d3e91c6a65a264f10eae1","target":"record","created_at":"2026-05-17T23:52:46Z","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":"198b372ad7a0f9fd9efc3bdb995c6421596aa7363330e2b0d9561e8ff431acd7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-02-25T08:58:10Z","title_canon_sha256":"4e8f84b48727d56164a5508d4c1d4bf2f7acdbbb890d1373a99d3332032a4daa"},"schema_version":"1.0","source":{"id":"1902.09145","kind":"arxiv","version":1}},"canonical_sha256":"19aa3c02b8ac1f264bf31e383f8827d02a45d31201cac9a4342885ebff7a83df","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"19aa3c02b8ac1f264bf31e383f8827d02a45d31201cac9a4342885ebff7a83df","first_computed_at":"2026-05-17T23:52:46.522407Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:46.522407Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UuJg3MYsAtJTulr1Y+DFUVucNIW77CS6QBnr0+Jdv4eTIysUdkamGDa2VBy0egbKv01D5DCa8m+s1bGTAL9JCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:46.522875Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.09145","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e5c6302cfbd04e49f402bdbde5673f5fd6e02017f25d3e91c6a65a264f10eae1","sha256:406e9df984f14bd4b1f77246a4a6e2cb78aa79bc612f84ad083747a079bb14ec"],"state_sha256":"a48b71b8f2780cf7e0a02dca71ce1938279d9e8b3709c5ec2e647761b58d4a47"}