{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:EFDBBU2TKBSYFBIGXAZTYHS7D3","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":"369b17a28d4bc27bcce3a34d732b31bea47d7a3b6c9aa7d0f5ba970bf8dc21f4","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-10-26T01:04:19Z","title_canon_sha256":"16fd70a449a62cc172ab0e0b6fb0999b49932b9feb6c4247839a74ef9634bd49"},"schema_version":"1.0","source":{"id":"2010.13268","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.13268","created_at":"2026-07-05T01:46:04Z"},{"alias_kind":"arxiv_version","alias_value":"2010.13268v1","created_at":"2026-07-05T01:46:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.13268","created_at":"2026-07-05T01:46:04Z"},{"alias_kind":"pith_short_12","alias_value":"EFDBBU2TKBSY","created_at":"2026-07-05T01:46:04Z"},{"alias_kind":"pith_short_16","alias_value":"EFDBBU2TKBSYFBIG","created_at":"2026-07-05T01:46:04Z"},{"alias_kind":"pith_short_8","alias_value":"EFDBBU2T","created_at":"2026-07-05T01:46:04Z"}],"graph_snapshots":[{"event_id":"sha256:66a77a2285099c2832dfe22dd998eee015cff9e651638b879b41db8fb8553468","target":"graph","created_at":"2026-07-05T01:46:04Z","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/2010.13268/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Phase unwrapping is a classical ill-posed problem which aims to recover the true phase from wrapped phase. In this paper, we introduce a novel Convolutional Neural Network (CNN) that incorporates a Spatial Quad-Directional Long Short Term Memory (SQD-LSTM) for phase unwrapping, by formulating it as a regression problem. Incorporating SQD-LSTM can circumvent the typical CNNs' inherent difficulty of learning global spatial dependencies which are vital when recovering the true phase. Furthermore, we employ a problem specific composite loss function to train this network. The proposed network is f","authors_text":"Ashwin De Silva, Malsha V. Perera","cross_cats":["eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-10-26T01:04:19Z","title":"A Joint Convolutional and Spatial Quad-Directional LSTM Network for Phase Unwrapping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.13268","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:cfb58b7e113b4ba1484a462597df3e6ff899f4f4ea5f5233ca2b3d0859f7ab3a","target":"record","created_at":"2026-07-05T01:46:04Z","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":"369b17a28d4bc27bcce3a34d732b31bea47d7a3b6c9aa7d0f5ba970bf8dc21f4","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-10-26T01:04:19Z","title_canon_sha256":"16fd70a449a62cc172ab0e0b6fb0999b49932b9feb6c4247839a74ef9634bd49"},"schema_version":"1.0","source":{"id":"2010.13268","kind":"arxiv","version":1}},"canonical_sha256":"214610d3535065828506b8333c1e5f1ef43983c3b5adaec3f2f8f9c155cad435","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"214610d3535065828506b8333c1e5f1ef43983c3b5adaec3f2f8f9c155cad435","first_computed_at":"2026-07-05T01:46:04.415492Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:46:04.415492Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uEcGjVd0WCluDsqF28zzIf1bLboc6cIRTx23q6a1Z9eSWjaI/hTFsIHpvkkfl9agkL0e1crB1wwaaArT7tpvDA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:46:04.415954Z","signed_message":"canonical_sha256_bytes"},"source_id":"2010.13268","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfb58b7e113b4ba1484a462597df3e6ff899f4f4ea5f5233ca2b3d0859f7ab3a","sha256:66a77a2285099c2832dfe22dd998eee015cff9e651638b879b41db8fb8553468"],"state_sha256":"346647ba9a0c92c397db045f74d5403e6e2a2141b4e22b56b13712227ddf020e"}