{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:OT4A7RPKFVFCUAJEF7SARHAQ7G","short_pith_number":"pith:OT4A7RPK","canonical_record":{"source":{"id":"2506.05348","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-06-05T17:59:57Z","cross_cats_sorted":[],"title_canon_sha256":"ec60044d6d9573e09bc7cc8a207e0a67a6b01799202c40c74e3ff42a022c8e3b","abstract_canon_sha256":"7018a6f18db923df17871191fdf2aca90707b0c2e5ddbf21799c03dfd8315e70"},"schema_version":"1.0"},"canonical_sha256":"74f80fc5ea2d4a2a01242fe4089c10f9ac54ffcd4f16d8511c76247e56373b97","source":{"kind":"arxiv","id":"2506.05348","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.05348","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"arxiv_version","alias_value":"2506.05348v2","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.05348","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"pith_short_12","alias_value":"OT4A7RPKFVFC","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"pith_short_16","alias_value":"OT4A7RPKFVFCUAJE","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"pith_short_8","alias_value":"OT4A7RPK","created_at":"2026-07-05T11:17:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:OT4A7RPKFVFCUAJEF7SARHAQ7G","target":"record","payload":{"canonical_record":{"source":{"id":"2506.05348","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-06-05T17:59:57Z","cross_cats_sorted":[],"title_canon_sha256":"ec60044d6d9573e09bc7cc8a207e0a67a6b01799202c40c74e3ff42a022c8e3b","abstract_canon_sha256":"7018a6f18db923df17871191fdf2aca90707b0c2e5ddbf21799c03dfd8315e70"},"schema_version":"1.0"},"canonical_sha256":"74f80fc5ea2d4a2a01242fe4089c10f9ac54ffcd4f16d8511c76247e56373b97","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:17:01.054922Z","signature_b64":"6iwzmY59fLLS92p6aryxJMxgsNNybPgN/bMAC9QsXeeysIcErSS5tme0892K9BsV+A73mzSMlH/Wtj2L1n/4DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"74f80fc5ea2d4a2a01242fe4089c10f9ac54ffcd4f16d8511c76247e56373b97","last_reissued_at":"2026-07-05T11:17:01.054444Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:17:01.054444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.05348","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:17:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/FEdQurQPDJ5q5Bozy9FIFKUOJGu5Xm8Lm275i0Ipaef6fvv0UN3p2s0Vbwvt+qtay8o1YEvS9ZeX1hI9Yt4Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:25:37.117395Z"},"content_sha256":"3fe36f8d81571f2cee915b166affaa6f751b802cc536efc620b39ce1da43e3b9","schema_version":"1.0","event_id":"sha256:3fe36f8d81571f2cee915b166affaa6f751b802cc536efc620b39ce1da43e3b9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:OT4A7RPKFVFCUAJEF7SARHAQ7G","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"FreeTimeGS: Free Gaussian Primitives at Anytime and Anywhere for Dynamic Scene Reconstruction","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Hujun Bao, Jiaming Sun, Peishan Yang, Sida Peng, Xiaowei Zhou, Yifan Wang, Yong Chen, Zhanhua Zhang, Zhen Xu","submitted_at":"2025-06-05T17:59:57Z","abstract_excerpt":"This paper addresses the challenge of reconstructing dynamic 3D scenes with complex motions. Some recent works define 3D Gaussian primitives in the canonical space and use deformation fields to map canonical primitives to observation spaces, achieving real-time dynamic view synthesis. However, these methods often struggle to handle scenes with complex motions due to the difficulty of optimizing deformation fields. To overcome this problem, we propose FreeTimeGS, a novel 4D representation that allows Gaussian primitives to appear at arbitrary time and locations. In contrast to canonical Gaussia"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.05348","kind":"arxiv","version":2},"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/2506.05348/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":"2026-07-05T11:17:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"swKe6bAWvQj8pV6vZ2Grlr/bkvdIcK0B3hqZ1hbGgoOxK7aNYfDu5L99PdUwpvRDLQsRvcoRS1/bMLnLsyXsCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:25:37.117963Z"},"content_sha256":"6378b57f46d82d0871684de4609ccf7f9ca5098a613193c9478f116e30dec7df","schema_version":"1.0","event_id":"sha256:6378b57f46d82d0871684de4609ccf7f9ca5098a613193c9478f116e30dec7df"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OT4A7RPKFVFCUAJEF7SARHAQ7G/bundle.json","state_url":"https://pith.science/pith/OT4A7RPKFVFCUAJEF7SARHAQ7G/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OT4A7RPKFVFCUAJEF7SARHAQ7G/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":"2026-08-05T02:25:37Z","links":{"resolver":"https://pith.science/pith/OT4A7RPKFVFCUAJEF7SARHAQ7G","bundle":"https://pith.science/pith/OT4A7RPKFVFCUAJEF7SARHAQ7G/bundle.json","state":"https://pith.science/pith/OT4A7RPKFVFCUAJEF7SARHAQ7G/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OT4A7RPKFVFCUAJEF7SARHAQ7G/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:OT4A7RPKFVFCUAJEF7SARHAQ7G","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":"7018a6f18db923df17871191fdf2aca90707b0c2e5ddbf21799c03dfd8315e70","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-06-05T17:59:57Z","title_canon_sha256":"ec60044d6d9573e09bc7cc8a207e0a67a6b01799202c40c74e3ff42a022c8e3b"},"schema_version":"1.0","source":{"id":"2506.05348","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.05348","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"arxiv_version","alias_value":"2506.05348v2","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.05348","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"pith_short_12","alias_value":"OT4A7RPKFVFC","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"pith_short_16","alias_value":"OT4A7RPKFVFCUAJE","created_at":"2026-07-05T11:17:01Z"},{"alias_kind":"pith_short_8","alias_value":"OT4A7RPK","created_at":"2026-07-05T11:17:01Z"}],"graph_snapshots":[{"event_id":"sha256:6378b57f46d82d0871684de4609ccf7f9ca5098a613193c9478f116e30dec7df","target":"graph","created_at":"2026-07-05T11:17:01Z","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/2506.05348/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper addresses the challenge of reconstructing dynamic 3D scenes with complex motions. Some recent works define 3D Gaussian primitives in the canonical space and use deformation fields to map canonical primitives to observation spaces, achieving real-time dynamic view synthesis. However, these methods often struggle to handle scenes with complex motions due to the difficulty of optimizing deformation fields. To overcome this problem, we propose FreeTimeGS, a novel 4D representation that allows Gaussian primitives to appear at arbitrary time and locations. In contrast to canonical Gaussia","authors_text":"Hujun Bao, Jiaming Sun, Peishan Yang, Sida Peng, Xiaowei Zhou, Yifan Wang, Yong Chen, Zhanhua Zhang, Zhen Xu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-06-05T17:59:57Z","title":"FreeTimeGS: Free Gaussian Primitives at Anytime and Anywhere for Dynamic Scene Reconstruction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.05348","kind":"arxiv","version":2},"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":"sha256:3fe36f8d81571f2cee915b166affaa6f751b802cc536efc620b39ce1da43e3b9","target":"record","created_at":"2026-07-05T11:17:01Z","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":"7018a6f18db923df17871191fdf2aca90707b0c2e5ddbf21799c03dfd8315e70","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2025-06-05T17:59:57Z","title_canon_sha256":"ec60044d6d9573e09bc7cc8a207e0a67a6b01799202c40c74e3ff42a022c8e3b"},"schema_version":"1.0","source":{"id":"2506.05348","kind":"arxiv","version":2}},"canonical_sha256":"74f80fc5ea2d4a2a01242fe4089c10f9ac54ffcd4f16d8511c76247e56373b97","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"74f80fc5ea2d4a2a01242fe4089c10f9ac54ffcd4f16d8511c76247e56373b97","first_computed_at":"2026-07-05T11:17:01.054444Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:17:01.054444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6iwzmY59fLLS92p6aryxJMxgsNNybPgN/bMAC9QsXeeysIcErSS5tme0892K9BsV+A73mzSMlH/Wtj2L1n/4DA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:17:01.054922Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.05348","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3fe36f8d81571f2cee915b166affaa6f751b802cc536efc620b39ce1da43e3b9","sha256:6378b57f46d82d0871684de4609ccf7f9ca5098a613193c9478f116e30dec7df"],"state_sha256":"22e54242aa72f56a9816f2c534c8f4b4e681ff47598271b45a92c4ee7aa9637c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SK1ocDkHylgtLnxvduspZUUX31KqUbJdQ1+MDBU5JrWmnl3hLzQNxvkopURwbghUwtakiOyQ+f7mSWSmeHydAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T02:25:37.122334Z","bundle_sha256":"2e1bf603af2b6b3b255dec9095eca46bb789aa61f64e75a49167911a3c032e72"}}