{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RYQSHLREBHAYMZO5HQM2GX4H7O","short_pith_number":"pith:RYQSHLRE","canonical_record":{"source":{"id":"1901.03472","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-01-11T04:15:09Z","cross_cats_sorted":[],"title_canon_sha256":"3f5875a893ae1a15ef32a56f42bc1fd100a512b38a552fb8d7d4fc24e88e8b24","abstract_canon_sha256":"abbda477aeeaf82972a4a9c49375639b8422cc918266e6f044fd335d4f171362"},"schema_version":"1.0"},"canonical_sha256":"8e2123ae2409c18665dd3c19a35f87fbb60651e0732a5dfbe9be843cea184a57","source":{"kind":"arxiv","id":"1901.03472","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.03472","created_at":"2026-05-17T23:56:31Z"},{"alias_kind":"arxiv_version","alias_value":"1901.03472v1","created_at":"2026-05-17T23:56:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03472","created_at":"2026-05-17T23:56:31Z"},{"alias_kind":"pith_short_12","alias_value":"RYQSHLREBHAY","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RYQSHLREBHAYMZO5","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RYQSHLRE","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RYQSHLREBHAYMZO5HQM2GX4H7O","target":"record","payload":{"canonical_record":{"source":{"id":"1901.03472","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-01-11T04:15:09Z","cross_cats_sorted":[],"title_canon_sha256":"3f5875a893ae1a15ef32a56f42bc1fd100a512b38a552fb8d7d4fc24e88e8b24","abstract_canon_sha256":"abbda477aeeaf82972a4a9c49375639b8422cc918266e6f044fd335d4f171362"},"schema_version":"1.0"},"canonical_sha256":"8e2123ae2409c18665dd3c19a35f87fbb60651e0732a5dfbe9be843cea184a57","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:31.154456Z","signature_b64":"OIcmbAsL8ljkbUxx6vE5Ye+rkHRun2ImbLIgcoutkJFHgS4P7J6gA/7RlYLYwobb2hq1kNhr3Y1SefuWQiLzAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8e2123ae2409c18665dd3c19a35f87fbb60651e0732a5dfbe9be843cea184a57","last_reissued_at":"2026-05-17T23:56:31.154033Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:31.154033Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.03472","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":"2026-05-17T23:56:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uz+Q/Fpkx57Ab2iwIedpMRhmyb3y8NkIlXkcz0/fRsJLzLlbiOnsy/V9+zM+jCcMsnpuph8XIx2KJ4SbYs1OCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:52:39.438013Z"},"content_sha256":"0adec90ecc8d6f1f342148542b9178ea4e0788f2ed0b499f16175d31b5f299c3","schema_version":"1.0","event_id":"sha256:0adec90ecc8d6f1f342148542b9178ea4e0788f2ed0b499f16175d31b5f299c3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RYQSHLREBHAYMZO5HQM2GX4H7O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Segmentation of Levator Hiatus Using Multi-Scale Local Region Active contours and Boundary Shape Similarity Constraint","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Dexing Kong, Rongqin Zheng, Xinling Zhang, Xu Li, Ying Chen, Yixin Gan","submitted_at":"2019-01-11T04:15:09Z","abstract_excerpt":"In this paper, a multi-scale framework with local region based active contour and boundary shape similarity constraint is proposed for the segmentation of levator hiatus in ultrasound images. In this paper, we proposed a multiscale active contour framework to segment levator hiatus ultrasound images by combining the local region information and boundary shape similarity constraint. In order to get more precisely initializations and reduce the computational cost, Gaussian pyramid method is used to decompose the image into coarse-to-fine scales. A localized region active contour model is firstly"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03472","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":"2026-05-17T23:56:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WyfTQhlNPqrafDzpXuqnB0BDaXPFhWzS4nlgHLOc/+B7bVgkuOUu6Bc6A0YaN/2RBgCHlNtBI+Y3lmKjoDqhAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T23:52:39.438373Z"},"content_sha256":"57e07ded272445a613637ba9987320090bc5f4e6bedfd6bb78046b3b7145dd34","schema_version":"1.0","event_id":"sha256:57e07ded272445a613637ba9987320090bc5f4e6bedfd6bb78046b3b7145dd34"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RYQSHLREBHAYMZO5HQM2GX4H7O/bundle.json","state_url":"https://pith.science/pith/RYQSHLREBHAYMZO5HQM2GX4H7O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RYQSHLREBHAYMZO5HQM2GX4H7O/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":"2026-06-02T23:52:39Z","links":{"resolver":"https://pith.science/pith/RYQSHLREBHAYMZO5HQM2GX4H7O","bundle":"https://pith.science/pith/RYQSHLREBHAYMZO5HQM2GX4H7O/bundle.json","state":"https://pith.science/pith/RYQSHLREBHAYMZO5HQM2GX4H7O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RYQSHLREBHAYMZO5HQM2GX4H7O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RYQSHLREBHAYMZO5HQM2GX4H7O","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":"abbda477aeeaf82972a4a9c49375639b8422cc918266e6f044fd335d4f171362","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-01-11T04:15:09Z","title_canon_sha256":"3f5875a893ae1a15ef32a56f42bc1fd100a512b38a552fb8d7d4fc24e88e8b24"},"schema_version":"1.0","source":{"id":"1901.03472","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.03472","created_at":"2026-05-17T23:56:31Z"},{"alias_kind":"arxiv_version","alias_value":"1901.03472v1","created_at":"2026-05-17T23:56:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.03472","created_at":"2026-05-17T23:56:31Z"},{"alias_kind":"pith_short_12","alias_value":"RYQSHLREBHAY","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"RYQSHLREBHAYMZO5","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"RYQSHLRE","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:57e07ded272445a613637ba9987320090bc5f4e6bedfd6bb78046b3b7145dd34","target":"graph","created_at":"2026-05-17T23:56:31Z","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, a multi-scale framework with local region based active contour and boundary shape similarity constraint is proposed for the segmentation of levator hiatus in ultrasound images. In this paper, we proposed a multiscale active contour framework to segment levator hiatus ultrasound images by combining the local region information and boundary shape similarity constraint. In order to get more precisely initializations and reduce the computational cost, Gaussian pyramid method is used to decompose the image into coarse-to-fine scales. A localized region active contour model is firstly","authors_text":"Dexing Kong, Rongqin Zheng, Xinling Zhang, Xu Li, Ying Chen, Yixin Gan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-01-11T04:15:09Z","title":"Segmentation of Levator Hiatus Using Multi-Scale Local Region Active contours and Boundary Shape Similarity Constraint"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.03472","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":"sha256:0adec90ecc8d6f1f342148542b9178ea4e0788f2ed0b499f16175d31b5f299c3","target":"record","created_at":"2026-05-17T23:56:31Z","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":"abbda477aeeaf82972a4a9c49375639b8422cc918266e6f044fd335d4f171362","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-01-11T04:15:09Z","title_canon_sha256":"3f5875a893ae1a15ef32a56f42bc1fd100a512b38a552fb8d7d4fc24e88e8b24"},"schema_version":"1.0","source":{"id":"1901.03472","kind":"arxiv","version":1}},"canonical_sha256":"8e2123ae2409c18665dd3c19a35f87fbb60651e0732a5dfbe9be843cea184a57","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e2123ae2409c18665dd3c19a35f87fbb60651e0732a5dfbe9be843cea184a57","first_computed_at":"2026-05-17T23:56:31.154033Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:31.154033Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OIcmbAsL8ljkbUxx6vE5Ye+rkHRun2ImbLIgcoutkJFHgS4P7J6gA/7RlYLYwobb2hq1kNhr3Y1SefuWQiLzAA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:31.154456Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.03472","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0adec90ecc8d6f1f342148542b9178ea4e0788f2ed0b499f16175d31b5f299c3","sha256:57e07ded272445a613637ba9987320090bc5f4e6bedfd6bb78046b3b7145dd34"],"state_sha256":"ff17078d780861cfac4047c89c53f5e7472736b66c41c33be6c7e05d73a2ae56"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uL7CyynEaaPveLD/6r/pkrNiut/iqFTwK0rOYr8CvUKmeW1LbfVmie3NLHC8Qq0awWDkw8WYN1K73qJiflsuDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T23:52:39.440322Z","bundle_sha256":"c02f755b5f96f6ada80ee8ba14650eb8a67967d260619a9e7230e3c9d9f43737"}}