{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:L3ISO3WKISLIXO2OAM7RZ2VUGP","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":"f040290f7e103058c3056df237a73ed1b5d496b8eb9b956ad952f155aad9612e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-01-10T11:44:48Z","title_canon_sha256":"0aaf1d40c10b7ef684f4b443ce53ee69a059ef8959783194f58c43160fc73748"},"schema_version":"1.0","source":{"id":"1801.03318","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03318","created_at":"2026-05-18T00:26:17Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03318v1","created_at":"2026-05-18T00:26:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03318","created_at":"2026-05-18T00:26:17Z"},{"alias_kind":"pith_short_12","alias_value":"L3ISO3WKISLI","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"L3ISO3WKISLIXO2O","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"L3ISO3WK","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:c46635b872d8d0fe27e76f8b27ba18d3e02402a7dbcc5eb480f2fd471a9349bc","target":"graph","created_at":"2026-05-18T00:26:17Z","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":"Contrast and quality of ultrasound images are adversely affected by the excessive presence of speckle. However, being an inherent imaging property, speckle helps in tissue characterization and tracking. Thus, despeckling of the ultrasound images requires the reduction of speckle extent without any oversmoothing. In this letter, we aim to address the despeckling problem using an unsupervised deep adversarial approach. A despeckling residual neural network (DRNN) is trained with an adversarial loss imposed by a discriminator. The discriminator tries to differentiate between the despeckled images","authors_text":"Arvinder Singh Soin, Deepak Mishra, Mukul Sarkar, Santanu Chaudhury","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-01-10T11:44:48Z","title":"Unsupervised Despeckling"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03318","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":"sha256:76f15090aac822b4abd3960c1d035d15323b7b4b0f8df0c6d5e7d54a5ddef24b","target":"record","created_at":"2026-05-18T00:26:17Z","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":"f040290f7e103058c3056df237a73ed1b5d496b8eb9b956ad952f155aad9612e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-01-10T11:44:48Z","title_canon_sha256":"0aaf1d40c10b7ef684f4b443ce53ee69a059ef8959783194f58c43160fc73748"},"schema_version":"1.0","source":{"id":"1801.03318","kind":"arxiv","version":1}},"canonical_sha256":"5ed1276eca44968bbb4e033f1ceab433f44b993faa2785e01f09061df97ab459","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ed1276eca44968bbb4e033f1ceab433f44b993faa2785e01f09061df97ab459","first_computed_at":"2026-05-18T00:26:17.416157Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:17.416157Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GYOI8kML14T5BwomoCy2bpaPaFeeZfZjnBGUQv7RdwAGRtPWKADdiF6uoTJMHkgAPXp4wkkx4CFXq11gudSZBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:17.416944Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.03318","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:76f15090aac822b4abd3960c1d035d15323b7b4b0f8df0c6d5e7d54a5ddef24b","sha256:c46635b872d8d0fe27e76f8b27ba18d3e02402a7dbcc5eb480f2fd471a9349bc"],"state_sha256":"1df3038bc459d5ed51564a93e0d6f121ed038ea5891d58161ce4b952a4fd6c5a"}