{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:IBDODFND54PJHROVHYBXOSFX3C","short_pith_number":"pith:IBDODFND","canonical_record":{"source":{"id":"2308.07502","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2023-08-14T23:52:19Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"5f4178c79753a711493889fdf9be8f7a84c52fa004da6e17f496aefeb214b410","abstract_canon_sha256":"93f2bd8ecd7e5f4cb9507efd6cf6f28d3bb9089a394dcf0a0d46b5c93a6c8290"},"schema_version":"1.0"},"canonical_sha256":"4046e195a3ef1e93c5d53e037748b7d8a67e8cecb32dce5deefbb03feedce8e7","source":{"kind":"arxiv","id":"2308.07502","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.07502","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"arxiv_version","alias_value":"2308.07502v1","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.07502","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"pith_short_12","alias_value":"IBDODFND54PJ","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"pith_short_16","alias_value":"IBDODFND54PJHROV","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"pith_short_8","alias_value":"IBDODFND","created_at":"2026-07-05T06:41:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:IBDODFND54PJHROVHYBXOSFX3C","target":"record","payload":{"canonical_record":{"source":{"id":"2308.07502","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2023-08-14T23:52:19Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"5f4178c79753a711493889fdf9be8f7a84c52fa004da6e17f496aefeb214b410","abstract_canon_sha256":"93f2bd8ecd7e5f4cb9507efd6cf6f28d3bb9089a394dcf0a0d46b5c93a6c8290"},"schema_version":"1.0"},"canonical_sha256":"4046e195a3ef1e93c5d53e037748b7d8a67e8cecb32dce5deefbb03feedce8e7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:41:26.609872Z","signature_b64":"C7D2JAr0cNcDUbNd2KSG/yGIfgAaNAMDi8YzqYcdxr/D4hH0+w9qbNe7WPTbebuM70Y20rnKXqf+1b2Rg1ZtAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4046e195a3ef1e93c5d53e037748b7d8a67e8cecb32dce5deefbb03feedce8e7","last_reissued_at":"2026-07-05T06:41:26.609463Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:41:26.609463Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2308.07502","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":"2026-07-05T06:41:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fqoVJ4VqgryvBZ0eLlFN9eFtH4fMQ6x8esS615DfvkmRKYpoLDwSy8Y4h1Yadibui0BuQZ/cbvV9BrsaNS3cAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T13:01:16.748987Z"},"content_sha256":"757101fdbc2b498386831afa8d75cfdd6e8178deebac90455aed3ed9c82928b7","schema_version":"1.0","event_id":"sha256:757101fdbc2b498386831afa8d75cfdd6e8178deebac90455aed3ed9c82928b7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:IBDODFND54PJHROVHYBXOSFX3C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SpecTracle: Wearable Facial Motion Tracking from Unobtrusive Peripheral Cameras","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"cs.HC","authors_text":"Edward Wang, Jessica Echterhoff, Owen Bartolf, Sunny Chu, Varun Viswanath, Yinan Xuan","submitted_at":"2023-08-14T23:52:19Z","abstract_excerpt":"Facial motion tracking in head-mounted displays (HMD) has the potential to enable immersive \"face-to-face\" interaction in a virtual environment. However, current works on facial tracking are not suitable for unobtrusive augmented reality (AR) glasses or do not have the ability to track arbitrary facial movements. In this work, we demonstrate a novel system called SpecTracle that tracks a user's facial motions using two wide-angle cameras mounted right next to the visor of a Hololens. Avoiding the usage of cameras extended in front of the face, our system greatly improves the feasibility to int"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.07502","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/2308.07502/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":"2026-07-05T06:41:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J7UjiKTycEPhkGbYUQMJ81kQgLlVT0DI03JAWxflWFrN+SwVtx6RnMQ9jiGhi0dYCVHL8XmFE2fcNFT0wVbrCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T13:01:16.749423Z"},"content_sha256":"0107637c9ceb176f74d7001ec503e9893232f8a52a2ebdf6c91fff03c14d7862","schema_version":"1.0","event_id":"sha256:0107637c9ceb176f74d7001ec503e9893232f8a52a2ebdf6c91fff03c14d7862"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IBDODFND54PJHROVHYBXOSFX3C/bundle.json","state_url":"https://pith.science/pith/IBDODFND54PJHROVHYBXOSFX3C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IBDODFND54PJHROVHYBXOSFX3C/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":"2026-07-10T13:01:16Z","links":{"resolver":"https://pith.science/pith/IBDODFND54PJHROVHYBXOSFX3C","bundle":"https://pith.science/pith/IBDODFND54PJHROVHYBXOSFX3C/bundle.json","state":"https://pith.science/pith/IBDODFND54PJHROVHYBXOSFX3C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IBDODFND54PJHROVHYBXOSFX3C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:IBDODFND54PJHROVHYBXOSFX3C","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":"93f2bd8ecd7e5f4cb9507efd6cf6f28d3bb9089a394dcf0a0d46b5c93a6c8290","cross_cats_sorted":["cs.CV"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2023-08-14T23:52:19Z","title_canon_sha256":"5f4178c79753a711493889fdf9be8f7a84c52fa004da6e17f496aefeb214b410"},"schema_version":"1.0","source":{"id":"2308.07502","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.07502","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"arxiv_version","alias_value":"2308.07502v1","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.07502","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"pith_short_12","alias_value":"IBDODFND54PJ","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"pith_short_16","alias_value":"IBDODFND54PJHROV","created_at":"2026-07-05T06:41:26Z"},{"alias_kind":"pith_short_8","alias_value":"IBDODFND","created_at":"2026-07-05T06:41:26Z"}],"graph_snapshots":[{"event_id":"sha256:0107637c9ceb176f74d7001ec503e9893232f8a52a2ebdf6c91fff03c14d7862","target":"graph","created_at":"2026-07-05T06:41:26Z","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/2308.07502/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Facial motion tracking in head-mounted displays (HMD) has the potential to enable immersive \"face-to-face\" interaction in a virtual environment. However, current works on facial tracking are not suitable for unobtrusive augmented reality (AR) glasses or do not have the ability to track arbitrary facial movements. In this work, we demonstrate a novel system called SpecTracle that tracks a user's facial motions using two wide-angle cameras mounted right next to the visor of a Hololens. Avoiding the usage of cameras extended in front of the face, our system greatly improves the feasibility to int","authors_text":"Edward Wang, Jessica Echterhoff, Owen Bartolf, Sunny Chu, Varun Viswanath, Yinan Xuan","cross_cats":["cs.CV"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2023-08-14T23:52:19Z","title":"SpecTracle: Wearable Facial Motion Tracking from Unobtrusive Peripheral Cameras"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.07502","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":"sha256:757101fdbc2b498386831afa8d75cfdd6e8178deebac90455aed3ed9c82928b7","target":"record","created_at":"2026-07-05T06:41:26Z","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":"93f2bd8ecd7e5f4cb9507efd6cf6f28d3bb9089a394dcf0a0d46b5c93a6c8290","cross_cats_sorted":["cs.CV"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.HC","submitted_at":"2023-08-14T23:52:19Z","title_canon_sha256":"5f4178c79753a711493889fdf9be8f7a84c52fa004da6e17f496aefeb214b410"},"schema_version":"1.0","source":{"id":"2308.07502","kind":"arxiv","version":1}},"canonical_sha256":"4046e195a3ef1e93c5d53e037748b7d8a67e8cecb32dce5deefbb03feedce8e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4046e195a3ef1e93c5d53e037748b7d8a67e8cecb32dce5deefbb03feedce8e7","first_computed_at":"2026-07-05T06:41:26.609463Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:41:26.609463Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C7D2JAr0cNcDUbNd2KSG/yGIfgAaNAMDi8YzqYcdxr/D4hH0+w9qbNe7WPTbebuM70Y20rnKXqf+1b2Rg1ZtAA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:41:26.609872Z","signed_message":"canonical_sha256_bytes"},"source_id":"2308.07502","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:757101fdbc2b498386831afa8d75cfdd6e8178deebac90455aed3ed9c82928b7","sha256:0107637c9ceb176f74d7001ec503e9893232f8a52a2ebdf6c91fff03c14d7862"],"state_sha256":"d3e1f9769d52e3624862910fb4e56fc6c632d389bb51155be40025f0ed2b9855"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rsl9O8GBApNDx2SB4sHzwHr3gkM5lSP9E9wsBePBWlsaCDLvAKq4C1IsYC9tGg+M5/XDACei1sZ6abJ+DTrKBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-10T13:01:16.751455Z","bundle_sha256":"9da576a26b5cb8bf772dd21674eb8c58066dde261d2b47b425a41b8fda536b9f"}}