{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ALTUIJWFA5GPN542PYEV54VK46","short_pith_number":"pith:ALTUIJWF","canonical_record":{"source":{"id":"1609.05257","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-09-17T00:07:39Z","cross_cats_sorted":[],"title_canon_sha256":"e4b373b3e028c37d24eb9d24dd30fe6feb90be01112b482d0ba94a0b23cca8ec","abstract_canon_sha256":"d0e90a9aed782dae9a4cab7dcb6efa9d579b88ab733e708fda4467fab6badd9e"},"schema_version":"1.0"},"canonical_sha256":"02e74426c5074cf6f79a7e095ef2aae7adbb2bbbcfad537996666e72cfd8542e","source":{"kind":"arxiv","id":"1609.05257","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.05257","created_at":"2026-05-18T01:04:30Z"},{"alias_kind":"arxiv_version","alias_value":"1609.05257v1","created_at":"2026-05-18T01:04:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.05257","created_at":"2026-05-18T01:04:30Z"},{"alias_kind":"pith_short_12","alias_value":"ALTUIJWFA5GP","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"ALTUIJWFA5GPN542","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"ALTUIJWF","created_at":"2026-05-18T12:30:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ALTUIJWFA5GPN542PYEV54VK46","target":"record","payload":{"canonical_record":{"source":{"id":"1609.05257","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-09-17T00:07:39Z","cross_cats_sorted":[],"title_canon_sha256":"e4b373b3e028c37d24eb9d24dd30fe6feb90be01112b482d0ba94a0b23cca8ec","abstract_canon_sha256":"d0e90a9aed782dae9a4cab7dcb6efa9d579b88ab733e708fda4467fab6badd9e"},"schema_version":"1.0"},"canonical_sha256":"02e74426c5074cf6f79a7e095ef2aae7adbb2bbbcfad537996666e72cfd8542e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:04:30.777153Z","signature_b64":"Ei4C7EwVUjeeWPbWx0E/8pzN/xXcWfVcchv5dMNvvIPuAeJawFnqOqAZtXjZOU7gO7G+4xT3j/J27shFY2M6BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"02e74426c5074cf6f79a7e095ef2aae7adbb2bbbcfad537996666e72cfd8542e","last_reissued_at":"2026-05-18T01:04:30.776555Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:04:30.776555Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1609.05257","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":"2026-05-18T01:04:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k9aHi6IzSV5SftvSwNFPCqO21OBi7qiFlataVq36lvgGlUhY4HhJsPYokIC7nRGc+aaRxderlcQ2nIy6ER9TDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:28:10.826393Z"},"content_sha256":"9984aabd57369ec95393fbf688b0f658f75c245e69449d2f107a915a460a0c46","schema_version":"1.0","event_id":"sha256:9984aabd57369ec95393fbf688b0f658f75c245e69449d2f107a915a460a0c46"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ALTUIJWFA5GPN542PYEV54VK46","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A convolutional approach to reflection symmetry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Davi Geiger, Mads Lund, Marcelo Cicconet, Michael Werman, Vighnesh Birodkar","submitted_at":"2016-09-17T00:07:39Z","abstract_excerpt":"We present a convolutional approach to reflection symmetry detection in 2D. Our model, built on the products of complex-valued wavelet convolutions, simplifies previous edge-based pairwise methods. Being parameter-centered, as opposed to feature-centered, it has certain computational advantages when the object sizes are known a priori, as demonstrated in an ellipse detection application. The method outperforms the best-performing algorithm on the CVPR 2013 Symmetry Detection Competition Database in the single-symmetry case. Code and a new database for 2D symmetry detection is available."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.05257","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":"2026-05-18T01:04:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BYMzhV8N6tv4tM4q7OlFd0qQrTbjKXsYStQbeYGtet8LpBwJ7CGdDvB9OqaMwIl8dwF14FJU8KAwpMZKLJusBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T10:28:10.827001Z"},"content_sha256":"326ef7a2f1e09c0f1214b26120731c34dda4395b774b64af49bfa694eb265cf0","schema_version":"1.0","event_id":"sha256:326ef7a2f1e09c0f1214b26120731c34dda4395b774b64af49bfa694eb265cf0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ALTUIJWFA5GPN542PYEV54VK46/bundle.json","state_url":"https://pith.science/pith/ALTUIJWFA5GPN542PYEV54VK46/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ALTUIJWFA5GPN542PYEV54VK46/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":"2026-05-27T10:28:10Z","links":{"resolver":"https://pith.science/pith/ALTUIJWFA5GPN542PYEV54VK46","bundle":"https://pith.science/pith/ALTUIJWFA5GPN542PYEV54VK46/bundle.json","state":"https://pith.science/pith/ALTUIJWFA5GPN542PYEV54VK46/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ALTUIJWFA5GPN542PYEV54VK46/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ALTUIJWFA5GPN542PYEV54VK46","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":"d0e90a9aed782dae9a4cab7dcb6efa9d579b88ab733e708fda4467fab6badd9e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-09-17T00:07:39Z","title_canon_sha256":"e4b373b3e028c37d24eb9d24dd30fe6feb90be01112b482d0ba94a0b23cca8ec"},"schema_version":"1.0","source":{"id":"1609.05257","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.05257","created_at":"2026-05-18T01:04:30Z"},{"alias_kind":"arxiv_version","alias_value":"1609.05257v1","created_at":"2026-05-18T01:04:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.05257","created_at":"2026-05-18T01:04:30Z"},{"alias_kind":"pith_short_12","alias_value":"ALTUIJWFA5GP","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"ALTUIJWFA5GPN542","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"ALTUIJWF","created_at":"2026-05-18T12:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:326ef7a2f1e09c0f1214b26120731c34dda4395b774b64af49bfa694eb265cf0","target":"graph","created_at":"2026-05-18T01:04:30Z","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 convolutional approach to reflection symmetry detection in 2D. Our model, built on the products of complex-valued wavelet convolutions, simplifies previous edge-based pairwise methods. Being parameter-centered, as opposed to feature-centered, it has certain computational advantages when the object sizes are known a priori, as demonstrated in an ellipse detection application. The method outperforms the best-performing algorithm on the CVPR 2013 Symmetry Detection Competition Database in the single-symmetry case. Code and a new database for 2D symmetry detection is available.","authors_text":"Davi Geiger, Mads Lund, Marcelo Cicconet, Michael Werman, Vighnesh Birodkar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-09-17T00:07:39Z","title":"A convolutional approach to reflection symmetry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.05257","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":"sha256:9984aabd57369ec95393fbf688b0f658f75c245e69449d2f107a915a460a0c46","target":"record","created_at":"2026-05-18T01:04:30Z","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":"d0e90a9aed782dae9a4cab7dcb6efa9d579b88ab733e708fda4467fab6badd9e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-09-17T00:07:39Z","title_canon_sha256":"e4b373b3e028c37d24eb9d24dd30fe6feb90be01112b482d0ba94a0b23cca8ec"},"schema_version":"1.0","source":{"id":"1609.05257","kind":"arxiv","version":1}},"canonical_sha256":"02e74426c5074cf6f79a7e095ef2aae7adbb2bbbcfad537996666e72cfd8542e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02e74426c5074cf6f79a7e095ef2aae7adbb2bbbcfad537996666e72cfd8542e","first_computed_at":"2026-05-18T01:04:30.776555Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:30.776555Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ei4C7EwVUjeeWPbWx0E/8pzN/xXcWfVcchv5dMNvvIPuAeJawFnqOqAZtXjZOU7gO7G+4xT3j/J27shFY2M6BA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:30.777153Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.05257","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9984aabd57369ec95393fbf688b0f658f75c245e69449d2f107a915a460a0c46","sha256:326ef7a2f1e09c0f1214b26120731c34dda4395b774b64af49bfa694eb265cf0"],"state_sha256":"6307206577e8f671003745b40afeb9c874c8859e8f844ef29a779c3b68bfc89b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yqihqe/4fKEo5DZCXBCc98dHdHwRcMYbH7ovHzJSsG1jSGZWkY5ehJzmJNJ5t4khBMqjzI77JYGte/hg4zzoCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T10:28:10.830305Z","bundle_sha256":"d2a57f4bb77f98551615cd5d30240dedcb8c852c7987ac54fd72e48697549d55"}}