{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:K3LGP2OFTFJFOXER6DHV754XYZ","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":"568549d9825b7efc7c4f805d2eba4be6d31d61f9275c8237621c80e94be4b635","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2014-12-19T21:30:32Z","title_canon_sha256":"c04ae566f1fde9b91084d28fdd4bb8b8a11f4fe602d2ed42ee9d447a09004566"},"schema_version":"1.0","source":{"id":"1412.6537","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.6537","created_at":"2026-05-18T02:26:10Z"},{"alias_kind":"arxiv_version","alias_value":"1412.6537v2","created_at":"2026-05-18T02:26:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.6537","created_at":"2026-05-18T02:26:10Z"},{"alias_kind":"pith_short_12","alias_value":"K3LGP2OFTFJF","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"K3LGP2OFTFJFOXER","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"K3LGP2OF","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:271a849ebb614256734c77013cadf0148441f56ead817bd16e93aa6cd20e6627","target":"graph","created_at":"2026-05-18T02:26:10Z","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":"In this paper we propose a novel framework for learning local image descriptors in a discriminative manner. For this purpose we explore a siamese architecture of Deep Convolutional Neural Networks (CNN), with a Hinge embedding loss on the L2 distance between descriptors. Since a siamese architecture uses pairs rather than single image patches to train, there exist a large number of positive samples and an exponential number of negative samples. We propose to explore this space with a stochastic sampling of the training set, in combination with an aggressive mining strategy over both the positi","authors_text":"Edgar Simo-Serra, Eduard Trulls, Francesc Moreno-Noguer, Iasonas Kokkinos, Luis Ferraz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2014-12-19T21:30:32Z","title":"Fracking Deep Convolutional Image Descriptors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.6537","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:b7c0e40d42d9cdbd263ef9910b7931dfb73f95b31e54357aaf8be5142a239951","target":"record","created_at":"2026-05-18T02:26:10Z","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":"568549d9825b7efc7c4f805d2eba4be6d31d61f9275c8237621c80e94be4b635","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2014-12-19T21:30:32Z","title_canon_sha256":"c04ae566f1fde9b91084d28fdd4bb8b8a11f4fe602d2ed42ee9d447a09004566"},"schema_version":"1.0","source":{"id":"1412.6537","kind":"arxiv","version":2}},"canonical_sha256":"56d667e9c59952575c91f0cf5ff797c6459006e8f83f3b91c6c4cc998455c544","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"56d667e9c59952575c91f0cf5ff797c6459006e8f83f3b91c6c4cc998455c544","first_computed_at":"2026-05-18T02:26:10.302700Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:26:10.302700Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c5xfB5YWVYiOfZfH+bm3qOMVXZEwmQoRk44AWYXLJZMk5Lz25sFYl1WbrCQ+yVyu8Njo1jQklGTmcYeqMc9sBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:26:10.303428Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.6537","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7c0e40d42d9cdbd263ef9910b7931dfb73f95b31e54357aaf8be5142a239951","sha256:271a849ebb614256734c77013cadf0148441f56ead817bd16e93aa6cd20e6627"],"state_sha256":"936605a7ce45caea25afe7182bc06e99ae669284c02d38f83de2ada35403de55"}