{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:DR3GGQ7W574ZAW4MPT7A6FH2IK","short_pith_number":"pith:DR3GGQ7W","canonical_record":{"source":{"id":"1911.07069","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-11-16T18:13:43Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"642ba50fcd4d5996fbf03ce8ffc606fb8424ba8bbcac98e83f2f02ab9b387e33","abstract_canon_sha256":"66adb21c3588d773a1a17285650a1749ede1d6797b49a0c559bf7e661ba76e8b"},"schema_version":"1.0"},"canonical_sha256":"1c766343f6eff9905b8c7cfe0f14fa42805237d73b5098d94980cd34d0d3c8c7","source":{"kind":"arxiv","id":"1911.07069","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.07069","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"arxiv_version","alias_value":"1911.07069v1","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.07069","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"pith_short_12","alias_value":"DR3GGQ7W574Z","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"pith_short_16","alias_value":"DR3GGQ7W574ZAW4M","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"pith_short_8","alias_value":"DR3GGQ7W","created_at":"2026-07-05T00:19:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:DR3GGQ7W574ZAW4MPT7A6FH2IK","target":"record","payload":{"canonical_record":{"source":{"id":"1911.07069","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-11-16T18:13:43Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"642ba50fcd4d5996fbf03ce8ffc606fb8424ba8bbcac98e83f2f02ab9b387e33","abstract_canon_sha256":"66adb21c3588d773a1a17285650a1749ede1d6797b49a0c559bf7e661ba76e8b"},"schema_version":"1.0"},"canonical_sha256":"1c766343f6eff9905b8c7cfe0f14fa42805237d73b5098d94980cd34d0d3c8c7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:19:42.620463Z","signature_b64":"3QzP4mgjs3ZMejT87J65lGcPfrRvW71ESTfXoNPVqsT5mVb3vhjATWUdkHxW+F2B6B4bL/nA28vkL3epx/ISCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c766343f6eff9905b8c7cfe0f14fa42805237d73b5098d94980cd34d0d3c8c7","last_reissued_at":"2026-07-05T00:19:42.620064Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:19:42.620064Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.07069","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":"2026-07-05T00:19:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PoYa7lMMJwPQB0JTMuQ6DYN8yjVrb1oHh3bQS7MIWVNYfEpYn1rqqSOGAeWZ1vMQTrV6j7whFxL3GV/gv7YaDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T12:30:09.834204Z"},"content_sha256":"3a166f2a6234a1f94d480a3618295085a16235a0d4bd7ecabbaf8f3bde371798","schema_version":"1.0","event_id":"sha256:3a166f2a6234a1f94d480a3618295085a16235a0d4bd7ecabbaf8f3bde371798"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:DR3GGQ7W574ZAW4MPT7A6FH2IK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Kvasir-SEG: A Segmented Polyp Dataset","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"eess.IV","authors_text":"Dag Johansen, Debesh Jha, H{\\aa}vard D. Johansen, Michael A. Riegler, P{\\aa}l Halvorsen, Pia H. Smedsrud, Thomas de Lange","submitted_at":"2019-11-16T18:13:43Z","abstract_excerpt":"Pixel-wise image segmentation is a highly demanding task in medical-image analysis. In practice, it is difficult to find annotated medical images with corresponding segmentation masks. In this paper, we present Kvasir-SEG: an open-access dataset of gastrointestinal polyp images and corresponding segmentation masks, manually annotated by a medical doctor and then verified by an experienced gastroenterologist. Moreover, we also generated the bounding boxes of the polyp regions with the help of segmentation masks. We demonstrate the use of our dataset with a traditional segmentation approach and "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.07069","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.07069/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:19:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QqO6SVAwkg/1LQ4ESflX2ZMeM9dgq4Urz5ULIPQb95BkbZUNkdW5hrwMFYSkd3LtPil1zKt3VnHWpqBXy3PyDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T12:30:09.834745Z"},"content_sha256":"04d1a0d3cd618dd169e8c7b940811d819a250d9b82023f91d66d9193a00f2770","schema_version":"1.0","event_id":"sha256:04d1a0d3cd618dd169e8c7b940811d819a250d9b82023f91d66d9193a00f2770"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DR3GGQ7W574ZAW4MPT7A6FH2IK/bundle.json","state_url":"https://pith.science/pith/DR3GGQ7W574ZAW4MPT7A6FH2IK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DR3GGQ7W574ZAW4MPT7A6FH2IK/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":"2026-08-08T12:30:09Z","links":{"resolver":"https://pith.science/pith/DR3GGQ7W574ZAW4MPT7A6FH2IK","bundle":"https://pith.science/pith/DR3GGQ7W574ZAW4MPT7A6FH2IK/bundle.json","state":"https://pith.science/pith/DR3GGQ7W574ZAW4MPT7A6FH2IK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DR3GGQ7W574ZAW4MPT7A6FH2IK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:DR3GGQ7W574ZAW4MPT7A6FH2IK","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":"66adb21c3588d773a1a17285650a1749ede1d6797b49a0c559bf7e661ba76e8b","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-11-16T18:13:43Z","title_canon_sha256":"642ba50fcd4d5996fbf03ce8ffc606fb8424ba8bbcac98e83f2f02ab9b387e33"},"schema_version":"1.0","source":{"id":"1911.07069","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.07069","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"arxiv_version","alias_value":"1911.07069v1","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.07069","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"pith_short_12","alias_value":"DR3GGQ7W574Z","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"pith_short_16","alias_value":"DR3GGQ7W574ZAW4M","created_at":"2026-07-05T00:19:42Z"},{"alias_kind":"pith_short_8","alias_value":"DR3GGQ7W","created_at":"2026-07-05T00:19:42Z"}],"graph_snapshots":[{"event_id":"sha256:04d1a0d3cd618dd169e8c7b940811d819a250d9b82023f91d66d9193a00f2770","target":"graph","created_at":"2026-07-05T00:19:42Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1911.07069/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Pixel-wise image segmentation is a highly demanding task in medical-image analysis. In practice, it is difficult to find annotated medical images with corresponding segmentation masks. In this paper, we present Kvasir-SEG: an open-access dataset of gastrointestinal polyp images and corresponding segmentation masks, manually annotated by a medical doctor and then verified by an experienced gastroenterologist. Moreover, we also generated the bounding boxes of the polyp regions with the help of segmentation masks. We demonstrate the use of our dataset with a traditional segmentation approach and ","authors_text":"Dag Johansen, Debesh Jha, H{\\aa}vard D. Johansen, Michael A. Riegler, P{\\aa}l Halvorsen, Pia H. Smedsrud, Thomas de Lange","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-11-16T18:13:43Z","title":"Kvasir-SEG: A Segmented Polyp Dataset"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.07069","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":"sha256:3a166f2a6234a1f94d480a3618295085a16235a0d4bd7ecabbaf8f3bde371798","target":"record","created_at":"2026-07-05T00:19:42Z","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":"66adb21c3588d773a1a17285650a1749ede1d6797b49a0c559bf7e661ba76e8b","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-11-16T18:13:43Z","title_canon_sha256":"642ba50fcd4d5996fbf03ce8ffc606fb8424ba8bbcac98e83f2f02ab9b387e33"},"schema_version":"1.0","source":{"id":"1911.07069","kind":"arxiv","version":1}},"canonical_sha256":"1c766343f6eff9905b8c7cfe0f14fa42805237d73b5098d94980cd34d0d3c8c7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1c766343f6eff9905b8c7cfe0f14fa42805237d73b5098d94980cd34d0d3c8c7","first_computed_at":"2026-07-05T00:19:42.620064Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:19:42.620064Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3QzP4mgjs3ZMejT87J65lGcPfrRvW71ESTfXoNPVqsT5mVb3vhjATWUdkHxW+F2B6B4bL/nA28vkL3epx/ISCA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:19:42.620463Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.07069","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a166f2a6234a1f94d480a3618295085a16235a0d4bd7ecabbaf8f3bde371798","sha256:04d1a0d3cd618dd169e8c7b940811d819a250d9b82023f91d66d9193a00f2770"],"state_sha256":"87979d04d15ea80eb3ac19c33a2bad20dd0c8534181e83248f365bb3df8a3f56"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mcgO15ToYrZAPlDipWvMjiVAgwLlSYEQG5wXQ+Kax9lOMksRFR9CibXd4IwhKIC7dowlGO6zdoVGfHYtk/05BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T12:30:09.838078Z","bundle_sha256":"3569097b9bd79c043803112344c01bdf13a45450102b645b904f994448a43680"}}