{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:SMFKDGWN7BSAMLZ4OH2F7T3ZWC","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":"1a23660953360cad8804f710b0f4c0c850a92d34943e49edaeb3a77e5283412a","cross_cats_sorted":["cs.CV","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2012-07-08T21:45:43Z","title_canon_sha256":"4a37fbeb2612e4bc593c8e0d112c73d171820fed14d85dfd40d389b3952cb7ba"},"schema_version":"1.0","source":{"id":"1207.1915","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.1915","created_at":"2026-05-18T03:46:48Z"},{"alias_kind":"arxiv_version","alias_value":"1207.1915v1","created_at":"2026-05-18T03:46:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.1915","created_at":"2026-05-18T03:46:48Z"},{"alias_kind":"pith_short_12","alias_value":"SMFKDGWN7BSA","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"SMFKDGWN7BSAMLZ4","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"SMFKDGWN","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:25d817f3c0d541f5de4d7c3529128f7dc679244322afa15e5fbe4145cbe32972","target":"graph","created_at":"2026-05-18T03:46:48Z","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 address the issue of edge detection in Synthetic Aperture Radar imagery. In particular, we propose nonparametric methods for edge detection, and numerically compare them to an alternative method that has been recently proposed in the literature. Our results show that some of the proposed methods display superior results and are computationally simpler than the existing method. An application to real (not simulated) data is presented and discussed.","authors_text":"Alejandro C. Frery, Edwin Gir\\'on, Francisco Cribari-Neto","cross_cats":["cs.CV","stat.ML"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2012-07-08T21:45:43Z","title":"Nonparametric Edge Detection in Speckled Imagery"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.1915","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":"sha256:01fa7a2f5c37524436fdfa9ea02fc6293a30d6f570b7dc17a1ed2d46cfa102e1","target":"record","created_at":"2026-05-18T03:46:48Z","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":"1a23660953360cad8804f710b0f4c0c850a92d34943e49edaeb3a77e5283412a","cross_cats_sorted":["cs.CV","stat.ML"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2012-07-08T21:45:43Z","title_canon_sha256":"4a37fbeb2612e4bc593c8e0d112c73d171820fed14d85dfd40d389b3952cb7ba"},"schema_version":"1.0","source":{"id":"1207.1915","kind":"arxiv","version":1}},"canonical_sha256":"930aa19acdf864062f3c71f45fcf79b095020f6a477afd5a9a4aa5d2e4c5f7ba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"930aa19acdf864062f3c71f45fcf79b095020f6a477afd5a9a4aa5d2e4c5f7ba","first_computed_at":"2026-05-18T03:46:48.840912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:46:48.840912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mRY6P+lFRre8omv72pL26YbunawiDMToC45Y/aLZeAH+sN8x//Hq4SSks8j1n+tDF9pqKgGZ+8Bn79oFlu4ZBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:46:48.841727Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.1915","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01fa7a2f5c37524436fdfa9ea02fc6293a30d6f570b7dc17a1ed2d46cfa102e1","sha256:25d817f3c0d541f5de4d7c3529128f7dc679244322afa15e5fbe4145cbe32972"],"state_sha256":"d6c1b668bc0379fdc06a44a3e1f378f21eca6977a8d77b9574f4ff0538b97f11"}