{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:HWPWJPFYZFBI7VOB3SDU3CVZ6V","short_pith_number":"pith:HWPWJPFY","canonical_record":{"source":{"id":"2108.08401","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-08-18T21:49:58Z","cross_cats_sorted":[],"title_canon_sha256":"08b7d8e3696e277022e7571a9ebe90fa40ff5dc098ebf093933e5240d19025e8","abstract_canon_sha256":"17db8cd88d9d80535c8dc3c1109b4f68e12ee2e0a318e3bee87cc58e92bda14b"},"schema_version":"1.0"},"canonical_sha256":"3d9f64bcb8c9428fd5c1dc874d8ab9f57ec8226ecc1318323276ba268e33ae70","source":{"kind":"arxiv","id":"2108.08401","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.08401","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"arxiv_version","alias_value":"2108.08401v1","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.08401","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"pith_short_12","alias_value":"HWPWJPFYZFBI","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"pith_short_16","alias_value":"HWPWJPFYZFBI7VOB","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"pith_short_8","alias_value":"HWPWJPFY","created_at":"2026-07-05T03:07:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:HWPWJPFYZFBI7VOB3SDU3CVZ6V","target":"record","payload":{"canonical_record":{"source":{"id":"2108.08401","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-08-18T21:49:58Z","cross_cats_sorted":[],"title_canon_sha256":"08b7d8e3696e277022e7571a9ebe90fa40ff5dc098ebf093933e5240d19025e8","abstract_canon_sha256":"17db8cd88d9d80535c8dc3c1109b4f68e12ee2e0a318e3bee87cc58e92bda14b"},"schema_version":"1.0"},"canonical_sha256":"3d9f64bcb8c9428fd5c1dc874d8ab9f57ec8226ecc1318323276ba268e33ae70","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:07:09.466274Z","signature_b64":"TyyJ2Bm899L/8/IjgK2w/esCJQ+fN9zY7SVIeVa3pXArwrxXDUFHOu26Ez+Os989Q/3CEIi0D4dWrc9GFdufDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3d9f64bcb8c9428fd5c1dc874d8ab9f57ec8226ecc1318323276ba268e33ae70","last_reissued_at":"2026-07-05T03:07:09.465781Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:07:09.465781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.08401","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":"2026-07-05T03:07:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MqfDZORfCQKQmqXgnQ+vVdJgUl/JgzJf6Saw+A8W3OjNSJgnexgMqGrNgmI62cWqsr24FKn4nJkCCnx+zfoNBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T09:18:26.888722Z"},"content_sha256":"2af518223634109e47e7db86afa6e9f7bb1e8823862c6e5d145e686959e60638","schema_version":"1.0","event_id":"sha256:2af518223634109e47e7db86afa6e9f7bb1e8823862c6e5d145e686959e60638"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:HWPWJPFYZFBI7VOB3SDU3CVZ6V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"GP-S3Net: Graph-based Panoptic Sparse Semantic Segmentation Network","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Ehsan Taghavi, Enxu Li, Liu Bingbing, Ran Cheng, Ryan Razani, Yuan Ren","submitted_at":"2021-08-18T21:49:58Z","abstract_excerpt":"Panoptic segmentation as an integrated task of both static environmental understanding and dynamic object identification, has recently begun to receive broad research interest. In this paper, we propose a new computationally efficient LiDAR based panoptic segmentation framework, called GP-S3Net. GP-S3Net is a proposal-free approach in which no object proposals are needed to identify the objects in contrast to conventional two-stage panoptic systems, where a detection network is incorporated for capturing instance information. Our new design consists of a novel instance-level network to process"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.08401","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/2108.08401/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":"2026-07-05T03:07:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZHpoaK9hOr0wvA1uV1K47J+IFcG9Jg/VMDasVjTJVK4eVn2Io2x/ckPjatRC1e/uveG4C7N0hgwJTY5A5iLcAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T09:18:26.889101Z"},"content_sha256":"26442d0fa11792fa496f49d757cd6cb0ab2f4efc986721f230b8baca0247589a","schema_version":"1.0","event_id":"sha256:26442d0fa11792fa496f49d757cd6cb0ab2f4efc986721f230b8baca0247589a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HWPWJPFYZFBI7VOB3SDU3CVZ6V/bundle.json","state_url":"https://pith.science/pith/HWPWJPFYZFBI7VOB3SDU3CVZ6V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HWPWJPFYZFBI7VOB3SDU3CVZ6V/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":"2026-07-05T09:18:26Z","links":{"resolver":"https://pith.science/pith/HWPWJPFYZFBI7VOB3SDU3CVZ6V","bundle":"https://pith.science/pith/HWPWJPFYZFBI7VOB3SDU3CVZ6V/bundle.json","state":"https://pith.science/pith/HWPWJPFYZFBI7VOB3SDU3CVZ6V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HWPWJPFYZFBI7VOB3SDU3CVZ6V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:HWPWJPFYZFBI7VOB3SDU3CVZ6V","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":"17db8cd88d9d80535c8dc3c1109b4f68e12ee2e0a318e3bee87cc58e92bda14b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-08-18T21:49:58Z","title_canon_sha256":"08b7d8e3696e277022e7571a9ebe90fa40ff5dc098ebf093933e5240d19025e8"},"schema_version":"1.0","source":{"id":"2108.08401","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.08401","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"arxiv_version","alias_value":"2108.08401v1","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.08401","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"pith_short_12","alias_value":"HWPWJPFYZFBI","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"pith_short_16","alias_value":"HWPWJPFYZFBI7VOB","created_at":"2026-07-05T03:07:09Z"},{"alias_kind":"pith_short_8","alias_value":"HWPWJPFY","created_at":"2026-07-05T03:07:09Z"}],"graph_snapshots":[{"event_id":"sha256:26442d0fa11792fa496f49d757cd6cb0ab2f4efc986721f230b8baca0247589a","target":"graph","created_at":"2026-07-05T03:07:09Z","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/2108.08401/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Panoptic segmentation as an integrated task of both static environmental understanding and dynamic object identification, has recently begun to receive broad research interest. In this paper, we propose a new computationally efficient LiDAR based panoptic segmentation framework, called GP-S3Net. GP-S3Net is a proposal-free approach in which no object proposals are needed to identify the objects in contrast to conventional two-stage panoptic systems, where a detection network is incorporated for capturing instance information. Our new design consists of a novel instance-level network to process","authors_text":"Ehsan Taghavi, Enxu Li, Liu Bingbing, Ran Cheng, Ryan Razani, Yuan Ren","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-08-18T21:49:58Z","title":"GP-S3Net: Graph-based Panoptic Sparse Semantic Segmentation Network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.08401","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":"sha256:2af518223634109e47e7db86afa6e9f7bb1e8823862c6e5d145e686959e60638","target":"record","created_at":"2026-07-05T03:07:09Z","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":"17db8cd88d9d80535c8dc3c1109b4f68e12ee2e0a318e3bee87cc58e92bda14b","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2021-08-18T21:49:58Z","title_canon_sha256":"08b7d8e3696e277022e7571a9ebe90fa40ff5dc098ebf093933e5240d19025e8"},"schema_version":"1.0","source":{"id":"2108.08401","kind":"arxiv","version":1}},"canonical_sha256":"3d9f64bcb8c9428fd5c1dc874d8ab9f57ec8226ecc1318323276ba268e33ae70","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3d9f64bcb8c9428fd5c1dc874d8ab9f57ec8226ecc1318323276ba268e33ae70","first_computed_at":"2026-07-05T03:07:09.465781Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:07:09.465781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TyyJ2Bm899L/8/IjgK2w/esCJQ+fN9zY7SVIeVa3pXArwrxXDUFHOu26Ez+Os989Q/3CEIi0D4dWrc9GFdufDw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:07:09.466274Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.08401","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2af518223634109e47e7db86afa6e9f7bb1e8823862c6e5d145e686959e60638","sha256:26442d0fa11792fa496f49d757cd6cb0ab2f4efc986721f230b8baca0247589a"],"state_sha256":"9e934653c067ebf432a338afbd47683145fe9717e3c5e1d3cffd9a432652ce81"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tvmfnSZSmM25f7s5fyNaskuHJj9KcDfdQ2gNUr+hnf2bWFrX67tKNNLm98FsyDO6gT9L6rv1IbFyOka/hsZlCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T09:18:26.891017Z","bundle_sha256":"01e1dd223a8ea2e4107355e17c27c3af42b0b4f4e91609e801675ddc4b814a78"}}