{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:HX3HRS6LWH6BXRIC5Y3PT64D2E","short_pith_number":"pith:HX3HRS6L","canonical_record":{"source":{"id":"2503.23151","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2025-03-29T17:11:34Z","cross_cats_sorted":[],"title_canon_sha256":"38ea2e4414f75d49e8ec0813e74c19e0d4027ddfb9a541b09fed92e093ab7934","abstract_canon_sha256":"4e0211b53a5d10f9413ab115830599184d54fb5b8a1f2e5aabf18b76f8d3079b"},"schema_version":"1.0"},"canonical_sha256":"3df678cbcbb1fc1bc502ee36f9fb83d1173ee6b00b4d63245b8d4baac754621b","source":{"kind":"arxiv","id":"2503.23151","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.23151","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"arxiv_version","alias_value":"2503.23151v1","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.23151","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"pith_short_12","alias_value":"HX3HRS6LWH6B","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"pith_short_16","alias_value":"HX3HRS6LWH6BXRIC","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"pith_short_8","alias_value":"HX3HRS6L","created_at":"2026-07-05T10:41:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:HX3HRS6LWH6BXRIC5Y3PT64D2E","target":"record","payload":{"canonical_record":{"source":{"id":"2503.23151","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2025-03-29T17:11:34Z","cross_cats_sorted":[],"title_canon_sha256":"38ea2e4414f75d49e8ec0813e74c19e0d4027ddfb9a541b09fed92e093ab7934","abstract_canon_sha256":"4e0211b53a5d10f9413ab115830599184d54fb5b8a1f2e5aabf18b76f8d3079b"},"schema_version":"1.0"},"canonical_sha256":"3df678cbcbb1fc1bc502ee36f9fb83d1173ee6b00b4d63245b8d4baac754621b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:41:31.454885Z","signature_b64":"uDwAaL/USMzDXaPBg8O1pnh1Ob0zJiDiMOXLKUD/HlkYjzA1D0NQh6qMoqkrdDo3Dy5BN3QBLDw1llC52wp4Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3df678cbcbb1fc1bc502ee36f9fb83d1173ee6b00b4d63245b8d4baac754621b","last_reissued_at":"2026-07-05T10:41:31.454398Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:41:31.454398Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2503.23151","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":"2026-07-05T10:41:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w/zQLRUHJaOFjbrT/bAYcVlzI6KfX+2MYtxLfESl8lGXqR4OUhJS7cFbY0kyURZq1MCtOAJdv0SPfwO4PvYBDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T18:24:10.255381Z"},"content_sha256":"248a0e0d5c10a7cb86ce8a616a00aaba82e8a054de9d5d2b305a4843f702184c","schema_version":"1.0","event_id":"sha256:248a0e0d5c10a7cb86ce8a616a00aaba82e8a054de9d5d2b305a4843f702184c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:HX3HRS6LWH6BXRIC5Y3PT64D2E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improved Motion Plane Adaptive 360-Degree Video Compression Using Affine Motion Models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.IV","authors_text":"Andr\\'e Kaup, Andy Regensky, Marina Ritthaler","submitted_at":"2025-03-29T17:11:34Z","abstract_excerpt":"Efficient compression of 360-degree video content requires the application of advanced motion models for interframe prediction. The Motion Plane Adaptive (MPA) motion model projects the frames on multiple perspective planes in the 3D space. It improves the motion compensation by estimating the motion on those planes with a translational diamond search. In this work, we enhance this motion model with an affine parameterization and motion estimation method. Thereby, we find a feasible trade-off between the quality of the reconstructed frames and the computational cost. The affine motion estimati"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.23151","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/2503.23151/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":"2026-07-05T10:41:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WYfDZrdlIAWAkpXAQivMrtOTMG9rI28t3lAx5IrcPvi5OLxdoBRYrqDk0Vy0DfBgCXKAEIpa5IQ5fVb2am8HCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T18:24:10.255902Z"},"content_sha256":"70ef3fdf39ce7aac0ff256c1ae69eacae98d50921ecbcd70882bb08730375101","schema_version":"1.0","event_id":"sha256:70ef3fdf39ce7aac0ff256c1ae69eacae98d50921ecbcd70882bb08730375101"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HX3HRS6LWH6BXRIC5Y3PT64D2E/bundle.json","state_url":"https://pith.science/pith/HX3HRS6LWH6BXRIC5Y3PT64D2E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HX3HRS6LWH6BXRIC5Y3PT64D2E/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":"2026-08-22T18:24:10Z","links":{"resolver":"https://pith.science/pith/HX3HRS6LWH6BXRIC5Y3PT64D2E","bundle":"https://pith.science/pith/HX3HRS6LWH6BXRIC5Y3PT64D2E/bundle.json","state":"https://pith.science/pith/HX3HRS6LWH6BXRIC5Y3PT64D2E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HX3HRS6LWH6BXRIC5Y3PT64D2E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:HX3HRS6LWH6BXRIC5Y3PT64D2E","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":"4e0211b53a5d10f9413ab115830599184d54fb5b8a1f2e5aabf18b76f8d3079b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2025-03-29T17:11:34Z","title_canon_sha256":"38ea2e4414f75d49e8ec0813e74c19e0d4027ddfb9a541b09fed92e093ab7934"},"schema_version":"1.0","source":{"id":"2503.23151","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.23151","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"arxiv_version","alias_value":"2503.23151v1","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.23151","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"pith_short_12","alias_value":"HX3HRS6LWH6B","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"pith_short_16","alias_value":"HX3HRS6LWH6BXRIC","created_at":"2026-07-05T10:41:31Z"},{"alias_kind":"pith_short_8","alias_value":"HX3HRS6L","created_at":"2026-07-05T10:41:31Z"}],"graph_snapshots":[{"event_id":"sha256:70ef3fdf39ce7aac0ff256c1ae69eacae98d50921ecbcd70882bb08730375101","target":"graph","created_at":"2026-07-05T10:41:31Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2503.23151/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Efficient compression of 360-degree video content requires the application of advanced motion models for interframe prediction. The Motion Plane Adaptive (MPA) motion model projects the frames on multiple perspective planes in the 3D space. It improves the motion compensation by estimating the motion on those planes with a translational diamond search. In this work, we enhance this motion model with an affine parameterization and motion estimation method. Thereby, we find a feasible trade-off between the quality of the reconstructed frames and the computational cost. The affine motion estimati","authors_text":"Andr\\'e Kaup, Andy Regensky, Marina Ritthaler","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2025-03-29T17:11:34Z","title":"Improved Motion Plane Adaptive 360-Degree Video Compression Using Affine Motion Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.23151","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":"sha256:248a0e0d5c10a7cb86ce8a616a00aaba82e8a054de9d5d2b305a4843f702184c","target":"record","created_at":"2026-07-05T10:41:31Z","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":"4e0211b53a5d10f9413ab115830599184d54fb5b8a1f2e5aabf18b76f8d3079b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2025-03-29T17:11:34Z","title_canon_sha256":"38ea2e4414f75d49e8ec0813e74c19e0d4027ddfb9a541b09fed92e093ab7934"},"schema_version":"1.0","source":{"id":"2503.23151","kind":"arxiv","version":1}},"canonical_sha256":"3df678cbcbb1fc1bc502ee36f9fb83d1173ee6b00b4d63245b8d4baac754621b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3df678cbcbb1fc1bc502ee36f9fb83d1173ee6b00b4d63245b8d4baac754621b","first_computed_at":"2026-07-05T10:41:31.454398Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:41:31.454398Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uDwAaL/USMzDXaPBg8O1pnh1Ob0zJiDiMOXLKUD/HlkYjzA1D0NQh6qMoqkrdDo3Dy5BN3QBLDw1llC52wp4Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:41:31.454885Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.23151","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:248a0e0d5c10a7cb86ce8a616a00aaba82e8a054de9d5d2b305a4843f702184c","sha256:70ef3fdf39ce7aac0ff256c1ae69eacae98d50921ecbcd70882bb08730375101"],"state_sha256":"1eecf8af7baa0c1888489dc8e3d13867661c2f93a222d1a838944c62ecf1a840"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fGvsGSFeQM1Q0mYR4Cl+UVXMi3oxBsBez+WkLZUdW6ezEEYz5kpWw5yXpeZ1I+JpnXlOjK/+6Bs2GvyzjvSNAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T18:24:10.260031Z","bundle_sha256":"bc2e119a44a775e526c6b4d8f2bd3dc0207bf1cc326ceaeee9232411f5f088d1"}}