{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:PXPOZNAADUAUREGSDEUQKDZNXK","short_pith_number":"pith:PXPOZNAA","canonical_record":{"source":{"id":"1911.02103","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-11-05T21:49:55Z","cross_cats_sorted":["cs.CL","cs.MM"],"title_canon_sha256":"c10571fdd7240a0c9722a0f17d8cbbe1e236691ef1b5049303fff7e589647d8e","abstract_canon_sha256":"c69266cbde3d8c2451bdff7cc6308a016a63f0eccbba08f68d8b91849e6836a8"},"schema_version":"1.0"},"canonical_sha256":"7ddeecb4001d014890d21929050f2dba949e3d61d5765a686dd5d04914be21ba","source":{"kind":"arxiv","id":"1911.02103","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.02103","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"arxiv_version","alias_value":"1911.02103v1","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.02103","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"pith_short_12","alias_value":"PXPOZNAADUAU","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"pith_short_16","alias_value":"PXPOZNAADUAUREGS","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"pith_short_8","alias_value":"PXPOZNAA","created_at":"2026-07-05T00:17:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:PXPOZNAADUAUREGSDEUQKDZNXK","target":"record","payload":{"canonical_record":{"source":{"id":"1911.02103","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-11-05T21:49:55Z","cross_cats_sorted":["cs.CL","cs.MM"],"title_canon_sha256":"c10571fdd7240a0c9722a0f17d8cbbe1e236691ef1b5049303fff7e589647d8e","abstract_canon_sha256":"c69266cbde3d8c2451bdff7cc6308a016a63f0eccbba08f68d8b91849e6836a8"},"schema_version":"1.0"},"canonical_sha256":"7ddeecb4001d014890d21929050f2dba949e3d61d5765a686dd5d04914be21ba","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:17:30.812165Z","signature_b64":"IuITiXcNooOG8M2hxaOhPHfyyCIWtNqumv+5K8qMLWEOUn9EQT76mr5h5pdwhEHYULz3v0KCyha8tqoH2c6zDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7ddeecb4001d014890d21929050f2dba949e3d61d5765a686dd5d04914be21ba","last_reissued_at":"2026-07-05T00:17:30.811765Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:17:30.811765Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.02103","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":"2026-07-05T00:17:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mzwFZw3yLHFsMtmKqEHscg7tSgwOkZ8WJudDT2CEZqo85oTM+iL2d8lqu5f5cORxcAL7qWVdedqMyj0UWs1QDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-24T03:42:51.442627Z"},"content_sha256":"195cf07236c7d60cf5511fac4d036c9a24a3d9c56157d20a5184e3c924dbfd34","schema_version":"1.0","event_id":"sha256:195cf07236c7d60cf5511fac4d036c9a24a3d9c56157d20a5184e3c924dbfd34"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:PXPOZNAADUAUREGSDEUQKDZNXK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Recurrent Instance Segmentation using Sequences of Referring Expressions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CL","cs.MM"],"primary_cat":"cs.CV","authors_text":"Alba Herrera-Palacio, Carina Silberer, Carles Ventura, Gemma Boleda, Ionut-Teodor Sorodoc, Xavier Giro-i-Nieto","submitted_at":"2019-11-05T21:49:55Z","abstract_excerpt":"The goal of this work is to segment the objects in an image that are referred to by a sequence of linguistic descriptions (referring expressions). We propose a deep neural network with recurrent layers that output a sequence of binary masks, one for each referring expression provided by the user. The recurrent layers in the architecture allow the model to condition each predicted mask on the previous ones, from a spatial perspective within the same image. Our multimodal approach uses off-the-shelf architectures to encode both the image and the referring expressions. The visual branch provides "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.02103","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/1911.02103/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":"2026-07-05T00:17:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q0+6QS6Wg83/xw/tLgfSMssKVrpUH0qTZHiKgzvp1Mlc010cjNssNGbCG2z3dNvqpyBwsa7By94VBK3R6oTkDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-24T03:42:51.443007Z"},"content_sha256":"35b50bae3b3c43a9de7478772f19dcbf4b7b9052e592eed0a138fb519d40a9e9","schema_version":"1.0","event_id":"sha256:35b50bae3b3c43a9de7478772f19dcbf4b7b9052e592eed0a138fb519d40a9e9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PXPOZNAADUAUREGSDEUQKDZNXK/bundle.json","state_url":"https://pith.science/pith/PXPOZNAADUAUREGSDEUQKDZNXK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PXPOZNAADUAUREGSDEUQKDZNXK/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":"2026-08-24T03:42:51Z","links":{"resolver":"https://pith.science/pith/PXPOZNAADUAUREGSDEUQKDZNXK","bundle":"https://pith.science/pith/PXPOZNAADUAUREGSDEUQKDZNXK/bundle.json","state":"https://pith.science/pith/PXPOZNAADUAUREGSDEUQKDZNXK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PXPOZNAADUAUREGSDEUQKDZNXK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:PXPOZNAADUAUREGSDEUQKDZNXK","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":"c69266cbde3d8c2451bdff7cc6308a016a63f0eccbba08f68d8b91849e6836a8","cross_cats_sorted":["cs.CL","cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-11-05T21:49:55Z","title_canon_sha256":"c10571fdd7240a0c9722a0f17d8cbbe1e236691ef1b5049303fff7e589647d8e"},"schema_version":"1.0","source":{"id":"1911.02103","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.02103","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"arxiv_version","alias_value":"1911.02103v1","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.02103","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"pith_short_12","alias_value":"PXPOZNAADUAU","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"pith_short_16","alias_value":"PXPOZNAADUAUREGS","created_at":"2026-07-05T00:17:30Z"},{"alias_kind":"pith_short_8","alias_value":"PXPOZNAA","created_at":"2026-07-05T00:17:30Z"}],"graph_snapshots":[{"event_id":"sha256:35b50bae3b3c43a9de7478772f19dcbf4b7b9052e592eed0a138fb519d40a9e9","target":"graph","created_at":"2026-07-05T00:17:30Z","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/1911.02103/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The goal of this work is to segment the objects in an image that are referred to by a sequence of linguistic descriptions (referring expressions). We propose a deep neural network with recurrent layers that output a sequence of binary masks, one for each referring expression provided by the user. The recurrent layers in the architecture allow the model to condition each predicted mask on the previous ones, from a spatial perspective within the same image. Our multimodal approach uses off-the-shelf architectures to encode both the image and the referring expressions. The visual branch provides ","authors_text":"Alba Herrera-Palacio, Carina Silberer, Carles Ventura, Gemma Boleda, Ionut-Teodor Sorodoc, Xavier Giro-i-Nieto","cross_cats":["cs.CL","cs.MM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-11-05T21:49:55Z","title":"Recurrent Instance Segmentation using Sequences of Referring Expressions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.02103","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":"sha256:195cf07236c7d60cf5511fac4d036c9a24a3d9c56157d20a5184e3c924dbfd34","target":"record","created_at":"2026-07-05T00:17:30Z","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":"c69266cbde3d8c2451bdff7cc6308a016a63f0eccbba08f68d8b91849e6836a8","cross_cats_sorted":["cs.CL","cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2019-11-05T21:49:55Z","title_canon_sha256":"c10571fdd7240a0c9722a0f17d8cbbe1e236691ef1b5049303fff7e589647d8e"},"schema_version":"1.0","source":{"id":"1911.02103","kind":"arxiv","version":1}},"canonical_sha256":"7ddeecb4001d014890d21929050f2dba949e3d61d5765a686dd5d04914be21ba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7ddeecb4001d014890d21929050f2dba949e3d61d5765a686dd5d04914be21ba","first_computed_at":"2026-07-05T00:17:30.811765Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:17:30.811765Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IuITiXcNooOG8M2hxaOhPHfyyCIWtNqumv+5K8qMLWEOUn9EQT76mr5h5pdwhEHYULz3v0KCyha8tqoH2c6zDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:17:30.812165Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.02103","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:195cf07236c7d60cf5511fac4d036c9a24a3d9c56157d20a5184e3c924dbfd34","sha256:35b50bae3b3c43a9de7478772f19dcbf4b7b9052e592eed0a138fb519d40a9e9"],"state_sha256":"7837ee900095ef0a94724c9b7ebbdfdf1d8fada75e079ff665d67bbdb484e855"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A4y/B74yHemtw8pQ3b/74LPc53IrvZCzKStWb3ASnOz/2MhJcc8TabT+H75e9glRFCs9B4APOVxtcmqDgLITBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-24T03:42:51.445636Z","bundle_sha256":"9c0ee1acca4b20d926c43dc2cdc2bc5701d0817e1de793be89ded73de44ee05d"}}