{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:XF4N3KQDEXGTBAHXN5PCMC5Z36","short_pith_number":"pith:XF4N3KQD","canonical_record":{"source":{"id":"1803.07883","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"q-bio.NC","submitted_at":"2018-03-21T12:27:53Z","cross_cats_sorted":[],"title_canon_sha256":"83616e55ccb452c4aca5261297b3d098fd6c6dfaa4a9cfee3def3dce6f10aaaa","abstract_canon_sha256":"9291de5b55ffcee2d4d0433ae29d1f44cb80e66b1fe564966d0c7a8ab1849301"},"schema_version":"1.0"},"canonical_sha256":"b978ddaa0325cd3080f76f5e260bb9dfa7e419e8c601a165b7f8ef31ffb945fa","source":{"kind":"arxiv","id":"1803.07883","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07883","created_at":"2026-05-18T00:20:28Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07883v1","created_at":"2026-05-18T00:20:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07883","created_at":"2026-05-18T00:20:28Z"},{"alias_kind":"pith_short_12","alias_value":"XF4N3KQDEXGT","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"XF4N3KQDEXGTBAHX","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"XF4N3KQD","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:XF4N3KQDEXGTBAHXN5PCMC5Z36","target":"record","payload":{"canonical_record":{"source":{"id":"1803.07883","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"q-bio.NC","submitted_at":"2018-03-21T12:27:53Z","cross_cats_sorted":[],"title_canon_sha256":"83616e55ccb452c4aca5261297b3d098fd6c6dfaa4a9cfee3def3dce6f10aaaa","abstract_canon_sha256":"9291de5b55ffcee2d4d0433ae29d1f44cb80e66b1fe564966d0c7a8ab1849301"},"schema_version":"1.0"},"canonical_sha256":"b978ddaa0325cd3080f76f5e260bb9dfa7e419e8c601a165b7f8ef31ffb945fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:28.645824Z","signature_b64":"0u3zXMfyVCh8M4oYLd9q7j+j1eKgAflPXiv0PWxNzhllKYXu3KIffy/K2fx3Fl5RTW6UIpFEPW2TJg362UKQCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b978ddaa0325cd3080f76f5e260bb9dfa7e419e8c601a165b7f8ef31ffb945fa","last_reissued_at":"2026-05-18T00:20:28.645231Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:28.645231Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.07883","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:20:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TmWNZ7AQsPJkYDOcOoIJ2xVzP6BRwb8nF1cBwnAvipNeCe+wRP6JP797KBPslaePxnGDZFzYMwnXdtd9jSj7Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:54:49.260684Z"},"content_sha256":"f2a197f562897bbced12b9e61bcfdfb01b57afc27c08e33465f2a474e482e556","schema_version":"1.0","event_id":"sha256:f2a197f562897bbced12b9e61bcfdfb01b57afc27c08e33465f2a474e482e556"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:XF4N3KQDEXGTBAHXN5PCMC5Z36","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scan transcription of two-dimensional shapes as an alternative neuromorphic concept","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":[],"primary_cat":"q-bio.NC","authors_text":"Ernest Greene, Yash Patel","submitted_at":"2018-03-21T12:27:53Z","abstract_excerpt":"Selfridge, along with Sutherland and Marr provided some of the earliest proposals for how to program computers to recognize shapes. Their emphasis on filtering for contour features, especially the orientation of boundary segments, was reinforced by the Nobel Prize winning work of Hubel & Wiesel who discovered that neurons in primary visual cortex selectively respond as a function of contour orientation. Countless investigators and theorists have continued to build on this approach. These models are often described as neuromorphic, which implies that the computational methods are based on biolo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07883","kind":"arxiv","version":1},"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":"2026-05-18T00:20:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sSOJPo2qH6fKlVSHeJE4WYyo0bxZii5RPcehBgU297Hjy2UJrdSfAMj2snBjHdGqQsXyKqFLIGHT+qHC5Mx1Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:54:49.261414Z"},"content_sha256":"62ffaeb50359543fb0a668ceda50e0ed1b45f806919d9c972483c8e24f3e444f","schema_version":"1.0","event_id":"sha256:62ffaeb50359543fb0a668ceda50e0ed1b45f806919d9c972483c8e24f3e444f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XF4N3KQDEXGTBAHXN5PCMC5Z36/bundle.json","state_url":"https://pith.science/pith/XF4N3KQDEXGTBAHXN5PCMC5Z36/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XF4N3KQDEXGTBAHXN5PCMC5Z36/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":"2026-06-09T08:54:49Z","links":{"resolver":"https://pith.science/pith/XF4N3KQDEXGTBAHXN5PCMC5Z36","bundle":"https://pith.science/pith/XF4N3KQDEXGTBAHXN5PCMC5Z36/bundle.json","state":"https://pith.science/pith/XF4N3KQDEXGTBAHXN5PCMC5Z36/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XF4N3KQDEXGTBAHXN5PCMC5Z36/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:XF4N3KQDEXGTBAHXN5PCMC5Z36","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":"9291de5b55ffcee2d4d0433ae29d1f44cb80e66b1fe564966d0c7a8ab1849301","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"q-bio.NC","submitted_at":"2018-03-21T12:27:53Z","title_canon_sha256":"83616e55ccb452c4aca5261297b3d098fd6c6dfaa4a9cfee3def3dce6f10aaaa"},"schema_version":"1.0","source":{"id":"1803.07883","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07883","created_at":"2026-05-18T00:20:28Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07883v1","created_at":"2026-05-18T00:20:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07883","created_at":"2026-05-18T00:20:28Z"},{"alias_kind":"pith_short_12","alias_value":"XF4N3KQDEXGT","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"XF4N3KQDEXGTBAHX","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"XF4N3KQD","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:62ffaeb50359543fb0a668ceda50e0ed1b45f806919d9c972483c8e24f3e444f","target":"graph","created_at":"2026-05-18T00:20:28Z","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":"Selfridge, along with Sutherland and Marr provided some of the earliest proposals for how to program computers to recognize shapes. Their emphasis on filtering for contour features, especially the orientation of boundary segments, was reinforced by the Nobel Prize winning work of Hubel & Wiesel who discovered that neurons in primary visual cortex selectively respond as a function of contour orientation. Countless investigators and theorists have continued to build on this approach. These models are often described as neuromorphic, which implies that the computational methods are based on biolo","authors_text":"Ernest Greene, Yash Patel","cross_cats":[],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"q-bio.NC","submitted_at":"2018-03-21T12:27:53Z","title":"Scan transcription of two-dimensional shapes as an alternative neuromorphic concept"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07883","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:f2a197f562897bbced12b9e61bcfdfb01b57afc27c08e33465f2a474e482e556","target":"record","created_at":"2026-05-18T00:20:28Z","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":"9291de5b55ffcee2d4d0433ae29d1f44cb80e66b1fe564966d0c7a8ab1849301","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"q-bio.NC","submitted_at":"2018-03-21T12:27:53Z","title_canon_sha256":"83616e55ccb452c4aca5261297b3d098fd6c6dfaa4a9cfee3def3dce6f10aaaa"},"schema_version":"1.0","source":{"id":"1803.07883","kind":"arxiv","version":1}},"canonical_sha256":"b978ddaa0325cd3080f76f5e260bb9dfa7e419e8c601a165b7f8ef31ffb945fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b978ddaa0325cd3080f76f5e260bb9dfa7e419e8c601a165b7f8ef31ffb945fa","first_computed_at":"2026-05-18T00:20:28.645231Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:28.645231Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0u3zXMfyVCh8M4oYLd9q7j+j1eKgAflPXiv0PWxNzhllKYXu3KIffy/K2fx3Fl5RTW6UIpFEPW2TJg362UKQCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:28.645824Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.07883","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f2a197f562897bbced12b9e61bcfdfb01b57afc27c08e33465f2a474e482e556","sha256:62ffaeb50359543fb0a668ceda50e0ed1b45f806919d9c972483c8e24f3e444f"],"state_sha256":"213213231c3991298dcbd71f818857c1bb4d2cea4b6e6e0fcdbd00cea6b08610"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"neWqcazhosZxvte9qJCSjngzU5qx1EQ9kGpcNDQQmkn3Gq5t3mhzw+BcUPZZSjgine7uXtFVN3/50YA0MYVLDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T08:54:49.265477Z","bundle_sha256":"f98709e51a0ac5a7019fd13f4aa85d206b580f030f7ff6bc8234335dcd7719eb"}}