{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:Q7OUY43UB72RN5BHTDNVCHBQYW","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":"ab3427defbcba2b18088ac3ca11946e6d10c7775d086f3e4bfb3ccba1a77859e","cross_cats_sorted":["math.GR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-05T14:14:13Z","title_canon_sha256":"f6b6f933b403990932692f2aa1b7c2ee60a21f95efe43ede542a315c553b5ece"},"schema_version":"1.0","source":{"id":"1803.01669","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.01669","created_at":"2026-05-18T00:21:33Z"},{"alias_kind":"arxiv_version","alias_value":"1803.01669v2","created_at":"2026-05-18T00:21:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.01669","created_at":"2026-05-18T00:21:33Z"},{"alias_kind":"pith_short_12","alias_value":"Q7OUY43UB72R","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"Q7OUY43UB72RN5BH","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"Q7OUY43U","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:bb4f04a0e920142a55ce95329c7b12c9e6da1a11964db43439af80f8a751f07f","target":"graph","created_at":"2026-05-18T00:21:33Z","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":"Image feature points are detected as pixels which locally maximize a detector function, two commonly used examples of which are the (Euclidean) image gradient and the Harris-Stephens corner detector. A major limitation of these feature detectors are that they are only Euclidean-invariant. In this work we demonstrate the application of a 2D affine-invariant image feature point detector based on differential invariants as derived through the equivariant method of moving frames. The fundamental equi-affine differential invariants for 3D image volumes are also computed.","authors_text":"Allen Tannenbaum, Peter J. Olver, Stanley L. Tuznik","cross_cats":["math.GR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-05T14:14:13Z","title":"Affine Differential Invariants for Invariant Feature Point Detection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.01669","kind":"arxiv","version":2},"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":"sha256:124b3e96b12873f17f50a40f573f4660e03e6edcf6292d5e5458a768891cc6c1","target":"record","created_at":"2026-05-18T00:21:33Z","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":"ab3427defbcba2b18088ac3ca11946e6d10c7775d086f3e4bfb3ccba1a77859e","cross_cats_sorted":["math.GR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-05T14:14:13Z","title_canon_sha256":"f6b6f933b403990932692f2aa1b7c2ee60a21f95efe43ede542a315c553b5ece"},"schema_version":"1.0","source":{"id":"1803.01669","kind":"arxiv","version":2}},"canonical_sha256":"87dd4c73740ff516f42798db511c30c5a8d4d7cdedb9ab4a186316cfb0a988a4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"87dd4c73740ff516f42798db511c30c5a8d4d7cdedb9ab4a186316cfb0a988a4","first_computed_at":"2026-05-18T00:21:33.994234Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:33.994234Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"p/K2jV3kDNxRLhNIMhtb8ufh+iRHx5x2XOWonVvyOMCeQR7jbHft2uhXvRY3Bh0Yf5nxcXpxxPmGUwnRSqkjBw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:33.994907Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.01669","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:124b3e96b12873f17f50a40f573f4660e03e6edcf6292d5e5458a768891cc6c1","sha256:bb4f04a0e920142a55ce95329c7b12c9e6da1a11964db43439af80f8a751f07f"],"state_sha256":"aa7f21926ab90116689a459f7469c4b2969bde1b2acc46c4bdb699b90b1fe237"}