{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:HMXZBJEO6UURFFYAPQQL75TF23","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":"1a47a92ddcacf1454348e50be1217c9737e24fa926cbe45d32f35f758fc6a1e8","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-06T20:00:36Z","title_canon_sha256":"e591f3146e924273a636a4d4ef8ecdad061f039f9ab4809487acd2254fe52214"},"schema_version":"1.0","source":{"id":"1507.01589","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.01589","created_at":"2026-05-18T01:37:12Z"},{"alias_kind":"arxiv_version","alias_value":"1507.01589v1","created_at":"2026-05-18T01:37:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.01589","created_at":"2026-05-18T01:37:12Z"},{"alias_kind":"pith_short_12","alias_value":"HMXZBJEO6UUR","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"HMXZBJEO6UURFFYA","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"HMXZBJEO","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:20adf1fbc8f622359399b774f3bf969ba8fc64f7434138e83afb1533c534d3d9","target":"graph","created_at":"2026-05-18T01:37:12Z","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 present a novel unsupervised learning approach to automatically segment and label images in astronomical surveys. Automation of this procedure will be essential as next-generation surveys enter the petabyte scale: data volumes will exceed the capability of even large crowd-sourced analyses. We demonstrate how a growing neural gas (GNG) can be used to encode the feature space of imaging data. When coupled with a technique called hierarchical clustering, imaging data can be automatically segmented and labelled by organising nodes in the GNG. The key distinction of unsupervised learning is tha","authors_text":"Alex Hocking (Herts), James E. Geach, Neil Davey, Yi Sun","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-06T20:00:36Z","title":"Teaching a machine to see: unsupervised image segmentation and categorisation using growing neural gas and hierarchical clustering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.01589","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:e6fa3a3eee0183e09540abd6924a567022aae87f66b52b100e23ed03493f1d49","target":"record","created_at":"2026-05-18T01:37:12Z","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":"1a47a92ddcacf1454348e50be1217c9737e24fa926cbe45d32f35f758fc6a1e8","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-06T20:00:36Z","title_canon_sha256":"e591f3146e924273a636a4d4ef8ecdad061f039f9ab4809487acd2254fe52214"},"schema_version":"1.0","source":{"id":"1507.01589","kind":"arxiv","version":1}},"canonical_sha256":"3b2f90a48ef5291297007c20bff665d6ef2685b697de2525705b8349e222edca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3b2f90a48ef5291297007c20bff665d6ef2685b697de2525705b8349e222edca","first_computed_at":"2026-05-18T01:37:12.940189Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:12.940189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Td55CDVgXywl9Ihts0KY6/hkUIn+3yf8BunfOW5tpX1LosXYbt0Oj+JR7yC9wnvsnBxc3J7cu6uwNHTBxpioDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:12.940749Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.01589","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e6fa3a3eee0183e09540abd6924a567022aae87f66b52b100e23ed03493f1d49","sha256:20adf1fbc8f622359399b774f3bf969ba8fc64f7434138e83afb1533c534d3d9"],"state_sha256":"fbef31facb576d3d14c37c90e4ff60ba8db8feb36e31d53d8721ff42aa670400"}