{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:6IAGYMWUV3SIDHKMI2ZVCJK6C6","short_pith_number":"pith:6IAGYMWU","canonical_record":{"source":{"id":"1303.6367","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-26T02:23:29Z","cross_cats_sorted":[],"title_canon_sha256":"8ace71a8f9c25ed0c6471df9a659aa50e2c22dd7eff656a036e6b490bcd0437d","abstract_canon_sha256":"6c8663cc11bef27f2f2e3976acd6dd207e3673c9ae2eaf89f4e47db53076d14a"},"schema_version":"1.0"},"canonical_sha256":"f2006c32d4aee4819d4c46b351255e17876e34901946529090bc4ba4d012a272","source":{"kind":"arxiv","id":"1303.6367","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.6367","created_at":"2026-05-18T01:50:52Z"},{"alias_kind":"arxiv_version","alias_value":"1303.6367v1","created_at":"2026-05-18T01:50:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.6367","created_at":"2026-05-18T01:50:52Z"},{"alias_kind":"pith_short_12","alias_value":"6IAGYMWUV3SI","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"6IAGYMWUV3SIDHKM","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"6IAGYMWU","created_at":"2026-05-18T12:27:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:6IAGYMWUV3SIDHKMI2ZVCJK6C6","target":"record","payload":{"canonical_record":{"source":{"id":"1303.6367","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-26T02:23:29Z","cross_cats_sorted":[],"title_canon_sha256":"8ace71a8f9c25ed0c6471df9a659aa50e2c22dd7eff656a036e6b490bcd0437d","abstract_canon_sha256":"6c8663cc11bef27f2f2e3976acd6dd207e3673c9ae2eaf89f4e47db53076d14a"},"schema_version":"1.0"},"canonical_sha256":"f2006c32d4aee4819d4c46b351255e17876e34901946529090bc4ba4d012a272","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:50:52.841827Z","signature_b64":"PJyT/C/ICecj0bmxVGqURhwXs88y8wGxPfrCGZoMQ8dWOiRRLLRbEhMtDraRhN9SlyMd672VhHHCxekQM8zYBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f2006c32d4aee4819d4c46b351255e17876e34901946529090bc4ba4d012a272","last_reissued_at":"2026-05-18T01:50:52.841234Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:50:52.841234Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.6367","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":"2026-05-18T01:50:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MZXqCIx2FGUPBy5wRz5kHXPTkwbuXfTdp6BZGvHbQqVLyxpby5B28utrD945zXlOnEHHSMU6pYxg1D+q7voaAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T19:15:57.106777Z"},"content_sha256":"4d82928c688f74347d3013994e6f7b1b478d01cb1ea8c0b643bf11bb16f4c6ea","schema_version":"1.0","event_id":"sha256:4d82928c688f74347d3013994e6f7b1b478d01cb1ea8c0b643bf11bb16f4c6ea"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:6IAGYMWUV3SIDHKMI2ZVCJK6C6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Development of an Advanced Automated Method for Solar Filament Recognition and Its Scientific Application to a Solar Cycle of MLSO H\\alpha\\ Data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Cheng Fang, P. F. Chen, Qi Hao","submitted_at":"2013-03-26T02:23:29Z","abstract_excerpt":"We developed a method to automatically detect and trace solar filaments in H\\alpha\\ full-disk images. The program is able not only to recognize filaments and determine their properties, such as the position, the area, the spine, and other relevant parameters, but also to trace the daily evolution of the filaments. The program consists of three steps: First, preprocessing is applied to correct the original images; Second, the Canny edge-detection method is used to detect filaments; Third, filament properties are recognized through the morphological operators. To test the algorithm, we applied i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.6367","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":"2026-05-18T01:50:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ofKTvqKQQEoSQNzfaChHOB69/9lIhgIRhf3qqTmWZsCEQlbL8haxksN8I15MVLk8lSvHC9C8YfuCIIwoMyOpBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T19:15:57.107134Z"},"content_sha256":"e876b5b85ba418cc32da80d730c89150b25ade14fab2b53e1c44b49a27ab388e","schema_version":"1.0","event_id":"sha256:e876b5b85ba418cc32da80d730c89150b25ade14fab2b53e1c44b49a27ab388e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6IAGYMWUV3SIDHKMI2ZVCJK6C6/bundle.json","state_url":"https://pith.science/pith/6IAGYMWUV3SIDHKMI2ZVCJK6C6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6IAGYMWUV3SIDHKMI2ZVCJK6C6/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":"2026-07-02T19:15:57Z","links":{"resolver":"https://pith.science/pith/6IAGYMWUV3SIDHKMI2ZVCJK6C6","bundle":"https://pith.science/pith/6IAGYMWUV3SIDHKMI2ZVCJK6C6/bundle.json","state":"https://pith.science/pith/6IAGYMWUV3SIDHKMI2ZVCJK6C6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6IAGYMWUV3SIDHKMI2ZVCJK6C6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:6IAGYMWUV3SIDHKMI2ZVCJK6C6","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":"6c8663cc11bef27f2f2e3976acd6dd207e3673c9ae2eaf89f4e47db53076d14a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-26T02:23:29Z","title_canon_sha256":"8ace71a8f9c25ed0c6471df9a659aa50e2c22dd7eff656a036e6b490bcd0437d"},"schema_version":"1.0","source":{"id":"1303.6367","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.6367","created_at":"2026-05-18T01:50:52Z"},{"alias_kind":"arxiv_version","alias_value":"1303.6367v1","created_at":"2026-05-18T01:50:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.6367","created_at":"2026-05-18T01:50:52Z"},{"alias_kind":"pith_short_12","alias_value":"6IAGYMWUV3SI","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"6IAGYMWUV3SIDHKM","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"6IAGYMWU","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:e876b5b85ba418cc32da80d730c89150b25ade14fab2b53e1c44b49a27ab388e","target":"graph","created_at":"2026-05-18T01:50:52Z","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 developed a method to automatically detect and trace solar filaments in H\\alpha\\ full-disk images. The program is able not only to recognize filaments and determine their properties, such as the position, the area, the spine, and other relevant parameters, but also to trace the daily evolution of the filaments. The program consists of three steps: First, preprocessing is applied to correct the original images; Second, the Canny edge-detection method is used to detect filaments; Third, filament properties are recognized through the morphological operators. To test the algorithm, we applied i","authors_text":"Cheng Fang, P. F. Chen, Qi Hao","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-26T02:23:29Z","title":"Development of an Advanced Automated Method for Solar Filament Recognition and Its Scientific Application to a Solar Cycle of MLSO H\\alpha\\ Data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.6367","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":"sha256:4d82928c688f74347d3013994e6f7b1b478d01cb1ea8c0b643bf11bb16f4c6ea","target":"record","created_at":"2026-05-18T01:50:52Z","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":"6c8663cc11bef27f2f2e3976acd6dd207e3673c9ae2eaf89f4e47db53076d14a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-03-26T02:23:29Z","title_canon_sha256":"8ace71a8f9c25ed0c6471df9a659aa50e2c22dd7eff656a036e6b490bcd0437d"},"schema_version":"1.0","source":{"id":"1303.6367","kind":"arxiv","version":1}},"canonical_sha256":"f2006c32d4aee4819d4c46b351255e17876e34901946529090bc4ba4d012a272","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f2006c32d4aee4819d4c46b351255e17876e34901946529090bc4ba4d012a272","first_computed_at":"2026-05-18T01:50:52.841234Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:50:52.841234Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PJyT/C/ICecj0bmxVGqURhwXs88y8wGxPfrCGZoMQ8dWOiRRLLRbEhMtDraRhN9SlyMd672VhHHCxekQM8zYBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:50:52.841827Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.6367","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d82928c688f74347d3013994e6f7b1b478d01cb1ea8c0b643bf11bb16f4c6ea","sha256:e876b5b85ba418cc32da80d730c89150b25ade14fab2b53e1c44b49a27ab388e"],"state_sha256":"d920891cd06fc5af6bb338dba71b01199e187ac716e9facf92301d397337f216"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TkAe740H2Ldq1jApCSYXZwLaRLJVDirii3/7k/wneaGaioLpse6TVAV7RRqGfcUi3+pGAM4gePIPL3kej687Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T19:15:57.109195Z","bundle_sha256":"467966686a0168343db9ec52a5c21cc241ee4614f2c1295b65a1532245f6d4b7"}}