{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:UZF2GMI7ZJDHFZDHMYLKEHXKNA","short_pith_number":"pith:UZF2GMI7","canonical_record":{"source":{"id":"1409.2465","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2014-09-08T19:02:01Z","cross_cats_sorted":[],"title_canon_sha256":"451265e11c7152f06a79a84808e637110e1f806289e3ba630e828e513c93c9e5","abstract_canon_sha256":"6a09a297696fb97916188513d7ca0b1ec480f21cc6caed2ba2390b49755eece7"},"schema_version":"1.0"},"canonical_sha256":"a64ba3311fca4672e4676616a21eea6811e204fde6b11e41ddc89ddd79495217","source":{"kind":"arxiv","id":"1409.2465","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.2465","created_at":"2026-05-18T02:43:10Z"},{"alias_kind":"arxiv_version","alias_value":"1409.2465v2","created_at":"2026-05-18T02:43:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.2465","created_at":"2026-05-18T02:43:10Z"},{"alias_kind":"pith_short_12","alias_value":"UZF2GMI7ZJDH","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UZF2GMI7ZJDHFZDH","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UZF2GMI7","created_at":"2026-05-18T12:28:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:UZF2GMI7ZJDHFZDHMYLKEHXKNA","target":"record","payload":{"canonical_record":{"source":{"id":"1409.2465","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2014-09-08T19:02:01Z","cross_cats_sorted":[],"title_canon_sha256":"451265e11c7152f06a79a84808e637110e1f806289e3ba630e828e513c93c9e5","abstract_canon_sha256":"6a09a297696fb97916188513d7ca0b1ec480f21cc6caed2ba2390b49755eece7"},"schema_version":"1.0"},"canonical_sha256":"a64ba3311fca4672e4676616a21eea6811e204fde6b11e41ddc89ddd79495217","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:43:10.385847Z","signature_b64":"Y99Y6buICCM9rPasv5wgxxqoW/Du2PXmPl8difAhfoFTkPvyCu6B/GFA4Dxt2Xb+xPY8cFO9wHBnnNNSh8z1Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a64ba3311fca4672e4676616a21eea6811e204fde6b11e41ddc89ddd79495217","last_reissued_at":"2026-05-18T02:43:10.385340Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:43:10.385340Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1409.2465","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:43:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1NQbU+o8bgcvQrAu/xMyfqtSQ/cH3u1CgEA3hSfGP5sdPeXWXieVfQmTrqPsbChhVwCtNiiSK+4vIxmVoVOvDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T18:36:56.516970Z"},"content_sha256":"a6ef49447c7ff6b90d66a942936563730fb3e9b5ae8cfb573f0315ee6a883db1","schema_version":"1.0","event_id":"sha256:a6ef49447c7ff6b90d66a942936563730fb3e9b5ae8cfb573f0315ee6a883db1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:UZF2GMI7ZJDHFZDHMYLKEHXKNA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comparing Feature Detectors: A bias in the repeatability criteria, and how to correct it","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Ives Rey-Otero, Jean-Michel Morel, Mauricio Delbracio","submitted_at":"2014-09-08T19:02:01Z","abstract_excerpt":"Most computer vision application rely on algorithms finding local correspondences between different images. These algorithms detect and compare stable local invariant descriptors centered at scale-invariant keypoints. Because of the importance of the problem, new keypoint detectors and descriptors are constantly being proposed, each one claiming to perform better (or to be complementary) to the preceding ones. This raises the question of a fair comparison between very diverse methods. This evaluation has been mainly based on a repeatability criterion of the keypoints under a series of image pe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.2465","kind":"arxiv","version":2},"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":"2026-05-18T02:43:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v5J3sttl+3GZh1mAsspwc2+dpF/RotF4n1teV5BYultJVa8qccvHNuCNVVsINxa5oUL+wuLTtsNT3pvocQxaCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T18:36:56.517673Z"},"content_sha256":"dbcfb1842d16ec93256bfeccb6b7882dae3e630fcc440baef8ac27713bfedbc3","schema_version":"1.0","event_id":"sha256:dbcfb1842d16ec93256bfeccb6b7882dae3e630fcc440baef8ac27713bfedbc3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UZF2GMI7ZJDHFZDHMYLKEHXKNA/bundle.json","state_url":"https://pith.science/pith/UZF2GMI7ZJDHFZDHMYLKEHXKNA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UZF2GMI7ZJDHFZDHMYLKEHXKNA/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":"2026-06-07T18:36:56Z","links":{"resolver":"https://pith.science/pith/UZF2GMI7ZJDHFZDHMYLKEHXKNA","bundle":"https://pith.science/pith/UZF2GMI7ZJDHFZDHMYLKEHXKNA/bundle.json","state":"https://pith.science/pith/UZF2GMI7ZJDHFZDHMYLKEHXKNA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UZF2GMI7ZJDHFZDHMYLKEHXKNA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:UZF2GMI7ZJDHFZDHMYLKEHXKNA","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":"6a09a297696fb97916188513d7ca0b1ec480f21cc6caed2ba2390b49755eece7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2014-09-08T19:02:01Z","title_canon_sha256":"451265e11c7152f06a79a84808e637110e1f806289e3ba630e828e513c93c9e5"},"schema_version":"1.0","source":{"id":"1409.2465","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.2465","created_at":"2026-05-18T02:43:10Z"},{"alias_kind":"arxiv_version","alias_value":"1409.2465v2","created_at":"2026-05-18T02:43:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.2465","created_at":"2026-05-18T02:43:10Z"},{"alias_kind":"pith_short_12","alias_value":"UZF2GMI7ZJDH","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UZF2GMI7ZJDHFZDH","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UZF2GMI7","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:dbcfb1842d16ec93256bfeccb6b7882dae3e630fcc440baef8ac27713bfedbc3","target":"graph","created_at":"2026-05-18T02:43:10Z","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":"Most computer vision application rely on algorithms finding local correspondences between different images. These algorithms detect and compare stable local invariant descriptors centered at scale-invariant keypoints. Because of the importance of the problem, new keypoint detectors and descriptors are constantly being proposed, each one claiming to perform better (or to be complementary) to the preceding ones. This raises the question of a fair comparison between very diverse methods. This evaluation has been mainly based on a repeatability criterion of the keypoints under a series of image pe","authors_text":"Ives Rey-Otero, Jean-Michel Morel, Mauricio Delbracio","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2014-09-08T19:02:01Z","title":"Comparing Feature Detectors: A bias in the repeatability criteria, and how to correct it"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.2465","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:a6ef49447c7ff6b90d66a942936563730fb3e9b5ae8cfb573f0315ee6a883db1","target":"record","created_at":"2026-05-18T02:43:10Z","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":"6a09a297696fb97916188513d7ca0b1ec480f21cc6caed2ba2390b49755eece7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2014-09-08T19:02:01Z","title_canon_sha256":"451265e11c7152f06a79a84808e637110e1f806289e3ba630e828e513c93c9e5"},"schema_version":"1.0","source":{"id":"1409.2465","kind":"arxiv","version":2}},"canonical_sha256":"a64ba3311fca4672e4676616a21eea6811e204fde6b11e41ddc89ddd79495217","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a64ba3311fca4672e4676616a21eea6811e204fde6b11e41ddc89ddd79495217","first_computed_at":"2026-05-18T02:43:10.385340Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:43:10.385340Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y99Y6buICCM9rPasv5wgxxqoW/Du2PXmPl8difAhfoFTkPvyCu6B/GFA4Dxt2Xb+xPY8cFO9wHBnnNNSh8z1Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:43:10.385847Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.2465","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a6ef49447c7ff6b90d66a942936563730fb3e9b5ae8cfb573f0315ee6a883db1","sha256:dbcfb1842d16ec93256bfeccb6b7882dae3e630fcc440baef8ac27713bfedbc3"],"state_sha256":"3a67c89211b328d1d1b4773ee4a8b78996da82c36a61ecd7e2b0e1d204b2b800"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NdoCIhShKwTpFUSQBYMRJHsb1KygTuUqxmQM0eofZld+TfRK06HoO35fGavCz9y18/swtBfvRlHCVc3mbg0FBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T18:36:56.521672Z","bundle_sha256":"7a75b16c7a83a3abccbd0bae3e1adc92bc70c0c4881650cf49fc92f8276b15f0"}}