{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:OXAKDRQA4HTF33AQJ373CMNJ6X","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":"3ba3a0699d8b5073455a373146651b020a7e8eac96f7a5fda807e2a7a98b773a","cross_cats_sorted":["cs.CV"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.IV","submitted_at":"2025-05-23T06:51:24Z","title_canon_sha256":"be4dcc032e251e0ca8300932b409d91d6462e95390820b7beb6e0963d33427ed"},"schema_version":"1.0","source":{"id":"2505.17544","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.17544","created_at":"2026-07-05T11:08:27Z"},{"alias_kind":"arxiv_version","alias_value":"2505.17544v1","created_at":"2026-07-05T11:08:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.17544","created_at":"2026-07-05T11:08:27Z"},{"alias_kind":"pith_short_12","alias_value":"OXAKDRQA4HTF","created_at":"2026-07-05T11:08:27Z"},{"alias_kind":"pith_short_16","alias_value":"OXAKDRQA4HTF33AQ","created_at":"2026-07-05T11:08:27Z"},{"alias_kind":"pith_short_8","alias_value":"OXAKDRQA","created_at":"2026-07-05T11:08:27Z"}],"graph_snapshots":[{"event_id":"sha256:c21c1980f541d6a2b476c8890c910efe23462a59e5eee51faadb27ebbef84d2e","target":"graph","created_at":"2026-07-05T11:08:27Z","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/2505.17544/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Medical image segmentation faces persistent challenges due to severe class imbalance and the frequency-specific distribution of anatomical structures. Most conventional CNN-based methods operate in the spatial domain and struggle to capture minority class signals, often affected by frequency aliasing and limited spectral selectivity. Transformer-based models, while powerful in modeling global dependencies, tend to overlook critical local details necessary for fine-grained segmentation. To overcome these limitations, we propose FreqU-FNet, a novel U-shaped segmentation architecture operating in","authors_text":"Ruiqi Xing","cross_cats":["cs.CV"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.IV","submitted_at":"2025-05-23T06:51:24Z","title":"FreqU-FNet: Frequency-Aware U-Net for Imbalanced Medical Image Segmentation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.17544","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:e544367694b2c7ee6cf147a5a45fdd84d607aba4aee40d573339f6b3ca33ba3c","target":"record","created_at":"2026-07-05T11:08:27Z","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":"3ba3a0699d8b5073455a373146651b020a7e8eac96f7a5fda807e2a7a98b773a","cross_cats_sorted":["cs.CV"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.IV","submitted_at":"2025-05-23T06:51:24Z","title_canon_sha256":"be4dcc032e251e0ca8300932b409d91d6462e95390820b7beb6e0963d33427ed"},"schema_version":"1.0","source":{"id":"2505.17544","kind":"arxiv","version":1}},"canonical_sha256":"75c0a1c600e1e65dec104effb131a9f5cce3018e161bbbf8bd4e647cdc521a1a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"75c0a1c600e1e65dec104effb131a9f5cce3018e161bbbf8bd4e647cdc521a1a","first_computed_at":"2026-07-05T11:08:27.936229Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:08:27.936229Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vlNAlMIGm4eWRHy5K2w/FuEm6UOqAS5Ja85rGCzbL9EVT85NhFG/6yc/GuKUQbu0Ck9sacItDmrl9fzilpP2CQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:08:27.936823Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.17544","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e544367694b2c7ee6cf147a5a45fdd84d607aba4aee40d573339f6b3ca33ba3c","sha256:c21c1980f541d6a2b476c8890c910efe23462a59e5eee51faadb27ebbef84d2e"],"state_sha256":"23b1d51cfb1009982f77da6c04a185fe3598c5f5281ece1483fef77190897aa7"}