{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:Y2543CG7ASKQUCXUB3OJRMSP47","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":"43b919c609b11793bc37069aff77dd64cbe9a10c7c6b307a372c28175a0a670a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-20T15:29:38Z","title_canon_sha256":"d68350af8bd5aaeaaa3ee3d4955a7d41f5814f9c1fc1f7bfa501f6ae6e4800ad"},"schema_version":"1.0","source":{"id":"1803.07485","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.07485","created_at":"2026-05-18T00:20:33Z"},{"alias_kind":"arxiv_version","alias_value":"1803.07485v1","created_at":"2026-05-18T00:20:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.07485","created_at":"2026-05-18T00:20:33Z"},{"alias_kind":"pith_short_12","alias_value":"Y2543CG7ASKQ","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_16","alias_value":"Y2543CG7ASKQUCXU","created_at":"2026-05-18T12:33:04Z"},{"alias_kind":"pith_short_8","alias_value":"Y2543CG7","created_at":"2026-05-18T12:33:04Z"}],"graph_snapshots":[{"event_id":"sha256:40a19bec616603dd7c05b060176bced3423e9d2d44c5f4b88578cff9ef1ef629","target":"graph","created_at":"2026-05-18T00:20:33Z","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"},"paper":{"abstract_excerpt":"This paper strives for pixel-level segmentation of actors and their actions in video content. Different from existing works, which all learn to segment from a fixed vocabulary of actor and action pairs, we infer the segmentation from a natural language input sentence. This allows to distinguish between fine-grained actors in the same super-category, identify actor and action instances, and segment pairs that are outside of the actor and action vocabulary. We propose a fully-convolutional model for pixel-level actor and action segmentation using an encoder-decoder architecture optimized for vid","authors_text":"Amir Ghodrati, Cees G.M. Snoek, Kirill Gavrilyuk, Zhenyang Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-20T15:29:38Z","title":"Actor and Action Video Segmentation from a Sentence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.07485","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":"sha256:200e86baf45ed4670ba75ff33f802f8913cf51296c96d86eebfd4b00a714f9a1","target":"record","created_at":"2026-05-18T00:20:33Z","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":"43b919c609b11793bc37069aff77dd64cbe9a10c7c6b307a372c28175a0a670a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-20T15:29:38Z","title_canon_sha256":"d68350af8bd5aaeaaa3ee3d4955a7d41f5814f9c1fc1f7bfa501f6ae6e4800ad"},"schema_version":"1.0","source":{"id":"1803.07485","kind":"arxiv","version":1}},"canonical_sha256":"c6bbcd88df04950a0af40edc98b24fe7ebd03be1ea70a6a4d242ddf7976db97b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c6bbcd88df04950a0af40edc98b24fe7ebd03be1ea70a6a4d242ddf7976db97b","first_computed_at":"2026-05-18T00:20:33.062578Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:33.062578Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yVC5NhI1AwovoDRcwQj8GbREoIm+SSYQ+nIKXeemue2Fnjy9z7YOOFdtVy5SJRcZBvnA6iz4oMc4TLRoWwmwAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:33.063161Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.07485","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:200e86baf45ed4670ba75ff33f802f8913cf51296c96d86eebfd4b00a714f9a1","sha256:40a19bec616603dd7c05b060176bced3423e9d2d44c5f4b88578cff9ef1ef629"],"state_sha256":"2e934ee4d9c190172da92ed8ba7e13ad2f957e41737d1aa5d0eaf62a71767dad"}