{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:K2BRGV3TZJRIGNKK4D5F6FFW6E","short_pith_number":"pith:K2BRGV3T","canonical_record":{"source":{"id":"1212.3530","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2012-12-14T17:04:03Z","cross_cats_sorted":[],"title_canon_sha256":"ca3d42d4a28c324f24273ec7fc918336cb1104ea433a75f71ce63b20df8b415d","abstract_canon_sha256":"1052c5c5b841315bb24dee808b27fe349548a3a775a7c6b53debeab7d4a3a688"},"schema_version":"1.0"},"canonical_sha256":"5683135773ca6283354ae0fa5f14b6f134064087281af27e12884e4c6392f415","source":{"kind":"arxiv","id":"1212.3530","version":5},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.3530","created_at":"2026-05-18T02:19:25Z"},{"alias_kind":"arxiv_version","alias_value":"1212.3530v5","created_at":"2026-05-18T02:19:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.3530","created_at":"2026-05-18T02:19:25Z"},{"alias_kind":"pith_short_12","alias_value":"K2BRGV3TZJRI","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"K2BRGV3TZJRIGNKK","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"K2BRGV3T","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:K2BRGV3TZJRIGNKK4D5F6FFW6E","target":"record","payload":{"canonical_record":{"source":{"id":"1212.3530","kind":"arxiv","version":5},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2012-12-14T17:04:03Z","cross_cats_sorted":[],"title_canon_sha256":"ca3d42d4a28c324f24273ec7fc918336cb1104ea433a75f71ce63b20df8b415d","abstract_canon_sha256":"1052c5c5b841315bb24dee808b27fe349548a3a775a7c6b53debeab7d4a3a688"},"schema_version":"1.0"},"canonical_sha256":"5683135773ca6283354ae0fa5f14b6f134064087281af27e12884e4c6392f415","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:19:25.944832Z","signature_b64":"AQC+W7meWfQBc/PDI3gD2KxQVdQb4n+hYZVVCcMyrRjs7tsAv2PQR9nDApdbn2ioitYQtSAuI1DgDegIeKJxBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5683135773ca6283354ae0fa5f14b6f134064087281af27e12884e4c6392f415","last_reissued_at":"2026-05-18T02:19:25.944085Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:19:25.944085Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.3530","source_version":5,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:19:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jdT5IEQheiouRm31o746y+w3OlGIC0hof92T0i7uezDQBLDRNnlZgDh36MaLdNbhNIGJwwdFxG5BUlcHaQOwDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T07:41:14.083596Z"},"content_sha256":"e062571641dc44b262f97ace583abc8697c38b468d62c474155a16381a85dbad","schema_version":"1.0","event_id":"sha256:e062571641dc44b262f97ace583abc8697c38b468d62c474155a16381a85dbad"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:K2BRGV3TZJRIGNKK4D5F6FFW6E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Multi-Orientation Analysis Approach to Retinal Vessel Tracking","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Bart ter Haar Romeny, Erik Bekkers, Remco Duits, Tos Berendschot","submitted_at":"2012-12-14T17:04:03Z","abstract_excerpt":"This paper presents a method for retinal vasculature extraction based on biologically inspired multi-orientation analysis. We apply multi-orientation analysis via so-called invertible orientation scores, modeling the cortical columns in the visual system of higher mammals. This allows us to generically deal with many hitherto complex problems inherent to vessel tracking, such as crossings, bifurcations, parallel vessels, vessels of varying widths and vessels with high curvature. Our approach applies tracking in invertible orientation scores via a novel geometrical principle for curve optimizat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.3530","kind":"arxiv","version":5},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:19:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hWtr5ztECHQwUqZRW8N4cIQKGZFvOe7d+vWuU0gzSEx0QySn5la0Ngh7z3pUWaaBvkdaMgNUKdJ4uT5oYKVYBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T07:41:14.084283Z"},"content_sha256":"c0e91fa816aeeeae39a42b8e3921cf6deb5eae2f54d181736f4a43129630b896","schema_version":"1.0","event_id":"sha256:c0e91fa816aeeeae39a42b8e3921cf6deb5eae2f54d181736f4a43129630b896"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K2BRGV3TZJRIGNKK4D5F6FFW6E/bundle.json","state_url":"https://pith.science/pith/K2BRGV3TZJRIGNKK4D5F6FFW6E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K2BRGV3TZJRIGNKK4D5F6FFW6E/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-10T07:41:14Z","links":{"resolver":"https://pith.science/pith/K2BRGV3TZJRIGNKK4D5F6FFW6E","bundle":"https://pith.science/pith/K2BRGV3TZJRIGNKK4D5F6FFW6E/bundle.json","state":"https://pith.science/pith/K2BRGV3TZJRIGNKK4D5F6FFW6E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K2BRGV3TZJRIGNKK4D5F6FFW6E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:K2BRGV3TZJRIGNKK4D5F6FFW6E","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":"1052c5c5b841315bb24dee808b27fe349548a3a775a7c6b53debeab7d4a3a688","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2012-12-14T17:04:03Z","title_canon_sha256":"ca3d42d4a28c324f24273ec7fc918336cb1104ea433a75f71ce63b20df8b415d"},"schema_version":"1.0","source":{"id":"1212.3530","kind":"arxiv","version":5}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.3530","created_at":"2026-05-18T02:19:25Z"},{"alias_kind":"arxiv_version","alias_value":"1212.3530v5","created_at":"2026-05-18T02:19:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.3530","created_at":"2026-05-18T02:19:25Z"},{"alias_kind":"pith_short_12","alias_value":"K2BRGV3TZJRI","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"K2BRGV3TZJRIGNKK","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"K2BRGV3T","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:c0e91fa816aeeeae39a42b8e3921cf6deb5eae2f54d181736f4a43129630b896","target":"graph","created_at":"2026-05-18T02:19:25Z","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":"This paper presents a method for retinal vasculature extraction based on biologically inspired multi-orientation analysis. We apply multi-orientation analysis via so-called invertible orientation scores, modeling the cortical columns in the visual system of higher mammals. This allows us to generically deal with many hitherto complex problems inherent to vessel tracking, such as crossings, bifurcations, parallel vessels, vessels of varying widths and vessels with high curvature. Our approach applies tracking in invertible orientation scores via a novel geometrical principle for curve optimizat","authors_text":"Bart ter Haar Romeny, Erik Bekkers, Remco Duits, Tos Berendschot","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2012-12-14T17:04:03Z","title":"A Multi-Orientation Analysis Approach to Retinal Vessel Tracking"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.3530","kind":"arxiv","version":5},"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:e062571641dc44b262f97ace583abc8697c38b468d62c474155a16381a85dbad","target":"record","created_at":"2026-05-18T02:19:25Z","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":"1052c5c5b841315bb24dee808b27fe349548a3a775a7c6b53debeab7d4a3a688","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2012-12-14T17:04:03Z","title_canon_sha256":"ca3d42d4a28c324f24273ec7fc918336cb1104ea433a75f71ce63b20df8b415d"},"schema_version":"1.0","source":{"id":"1212.3530","kind":"arxiv","version":5}},"canonical_sha256":"5683135773ca6283354ae0fa5f14b6f134064087281af27e12884e4c6392f415","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5683135773ca6283354ae0fa5f14b6f134064087281af27e12884e4c6392f415","first_computed_at":"2026-05-18T02:19:25.944085Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:19:25.944085Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AQC+W7meWfQBc/PDI3gD2KxQVdQb4n+hYZVVCcMyrRjs7tsAv2PQR9nDApdbn2ioitYQtSAuI1DgDegIeKJxBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:19:25.944832Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.3530","source_kind":"arxiv","source_version":5}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e062571641dc44b262f97ace583abc8697c38b468d62c474155a16381a85dbad","sha256:c0e91fa816aeeeae39a42b8e3921cf6deb5eae2f54d181736f4a43129630b896"],"state_sha256":"66837a8a2b793db57b3bf62f31df91cf905d7905c60f08bf7efec9092c8cb287"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MIVx+cp7vO9kB0Nort1mFwg2fpFm4M3/boAtrV6R0iSpX9oBY8t3opyXep0SvXCdy2+n1i4Rnap2N1/PkojyCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T07:41:14.088805Z","bundle_sha256":"1abf6cb7febfbed7d9a3e38036b4574a8896ec72efb8fb2d4cd556c1ab87ab45"}}