{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:PSPUP4UJDTJMSG25KYR4JV646U","short_pith_number":"pith:PSPUP4UJ","canonical_record":{"source":{"id":"2112.04481","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CV","submitted_at":"2021-12-08T18:59:04Z","cross_cats_sorted":["cs.GR"],"title_canon_sha256":"0c1710d1be2fed6a937e8947e7762df2cf641d1c2ea8b41ce8ebe80c0ba19a46","abstract_canon_sha256":"d51826437ada5047f2f4858ef434e2208307c28713a180765fb62353488d90c2"},"schema_version":"1.0"},"canonical_sha256":"7c9f47f2891cd2c91b5d5623c4d7dcf515946fb5f09504d1d54351e756545518","source":{"kind":"arxiv","id":"2112.04481","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.04481","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"arxiv_version","alias_value":"2112.04481v2","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.04481","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"pith_short_12","alias_value":"PSPUP4UJDTJM","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"pith_short_16","alias_value":"PSPUP4UJDTJMSG25","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"pith_short_8","alias_value":"PSPUP4UJ","created_at":"2026-07-05T04:11:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:PSPUP4UJDTJMSG25KYR4JV646U","target":"record","payload":{"canonical_record":{"source":{"id":"2112.04481","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CV","submitted_at":"2021-12-08T18:59:04Z","cross_cats_sorted":["cs.GR"],"title_canon_sha256":"0c1710d1be2fed6a937e8947e7762df2cf641d1c2ea8b41ce8ebe80c0ba19a46","abstract_canon_sha256":"d51826437ada5047f2f4858ef434e2208307c28713a180765fb62353488d90c2"},"schema_version":"1.0"},"canonical_sha256":"7c9f47f2891cd2c91b5d5623c4d7dcf515946fb5f09504d1d54351e756545518","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:11:09.741374Z","signature_b64":"1ro0xvUT8XpfimI6TE5zsh/EgOR5FUO0u/yy+HWdn2GHyyyekPwYm91rV2mizUM/kVJjnjR4d62XdmtshHDgCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7c9f47f2891cd2c91b5d5623c4d7dcf515946fb5f09504d1d54351e756545518","last_reissued_at":"2026-07-05T04:11:09.740867Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:11:09.740867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2112.04481","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":"2026-07-05T04:11:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Lxhq004UlYAmbZF5sTiZsmf7pGrnN1zWDa9QtyqsRjvrlBMc4d2ZzCrbNq6Pft5hnn6ysQzVGBclvA8bJA64BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:55:33.263690Z"},"content_sha256":"5d61026b5c053a0abca6e5e8ec8b5c6c3a8bfbe15f95ccffe36cd20040c399ca","schema_version":"1.0","event_id":"sha256:5d61026b5c053a0abca6e5e8ec8b5c6c3a8bfbe15f95ccffe36cd20040c399ca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:PSPUP4UJDTJMSG25KYR4JV646U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"What's Behind the Couch? Directed Ray Distance Functions (DRDF) for 3D Scene Reconstruction","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":["cs.GR"],"primary_cat":"cs.CV","authors_text":"David F. Fouhey, Justin Johnson, Nilesh Kulkarni","submitted_at":"2021-12-08T18:59:04Z","abstract_excerpt":"We present an approach for full 3D scene reconstruction from a single unseen image. We train on dataset of realistic non-watertight scans of scenes. Our approach predicts a distance function, since these have shown promise in handling complex topologies and large spaces. We identify and analyze two key challenges for predicting such image conditioned distance functions that have prevented their success on real 3D scene data. First, we show that predicting a conventional scene distance from an image requires reasoning over a large receptive field. Second, we analytically show that the optimal o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.04481","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/2112.04481/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":"2026-07-05T04:11:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jkaGhgsDKAKJr6tXNXu5x9PH6rZkd9TGQWtMKtFbmE7aCH6n/pP2Aw6CvqB/ci/KXQOPTp6rAT/8sxfmk+SpCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T06:55:33.264064Z"},"content_sha256":"e4d5a3e05732924685d400c1e5438e76966b3e1c2dab64cd60f3b151f7da2843","schema_version":"1.0","event_id":"sha256:e4d5a3e05732924685d400c1e5438e76966b3e1c2dab64cd60f3b151f7da2843"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PSPUP4UJDTJMSG25KYR4JV646U/bundle.json","state_url":"https://pith.science/pith/PSPUP4UJDTJMSG25KYR4JV646U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PSPUP4UJDTJMSG25KYR4JV646U/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":"2026-07-07T06:55:33Z","links":{"resolver":"https://pith.science/pith/PSPUP4UJDTJMSG25KYR4JV646U","bundle":"https://pith.science/pith/PSPUP4UJDTJMSG25KYR4JV646U/bundle.json","state":"https://pith.science/pith/PSPUP4UJDTJMSG25KYR4JV646U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PSPUP4UJDTJMSG25KYR4JV646U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:PSPUP4UJDTJMSG25KYR4JV646U","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":"d51826437ada5047f2f4858ef434e2208307c28713a180765fb62353488d90c2","cross_cats_sorted":["cs.GR"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CV","submitted_at":"2021-12-08T18:59:04Z","title_canon_sha256":"0c1710d1be2fed6a937e8947e7762df2cf641d1c2ea8b41ce8ebe80c0ba19a46"},"schema_version":"1.0","source":{"id":"2112.04481","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.04481","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"arxiv_version","alias_value":"2112.04481v2","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.04481","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"pith_short_12","alias_value":"PSPUP4UJDTJM","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"pith_short_16","alias_value":"PSPUP4UJDTJMSG25","created_at":"2026-07-05T04:11:09Z"},{"alias_kind":"pith_short_8","alias_value":"PSPUP4UJ","created_at":"2026-07-05T04:11:09Z"}],"graph_snapshots":[{"event_id":"sha256:e4d5a3e05732924685d400c1e5438e76966b3e1c2dab64cd60f3b151f7da2843","target":"graph","created_at":"2026-07-05T04:11:09Z","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/2112.04481/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an approach for full 3D scene reconstruction from a single unseen image. We train on dataset of realistic non-watertight scans of scenes. Our approach predicts a distance function, since these have shown promise in handling complex topologies and large spaces. We identify and analyze two key challenges for predicting such image conditioned distance functions that have prevented their success on real 3D scene data. First, we show that predicting a conventional scene distance from an image requires reasoning over a large receptive field. Second, we analytically show that the optimal o","authors_text":"David F. Fouhey, Justin Johnson, Nilesh Kulkarni","cross_cats":["cs.GR"],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CV","submitted_at":"2021-12-08T18:59:04Z","title":"What's Behind the Couch? Directed Ray Distance Functions (DRDF) for 3D Scene Reconstruction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.04481","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":"sha256:5d61026b5c053a0abca6e5e8ec8b5c6c3a8bfbe15f95ccffe36cd20040c399ca","target":"record","created_at":"2026-07-05T04:11:09Z","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":"d51826437ada5047f2f4858ef434e2208307c28713a180765fb62353488d90c2","cross_cats_sorted":["cs.GR"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.CV","submitted_at":"2021-12-08T18:59:04Z","title_canon_sha256":"0c1710d1be2fed6a937e8947e7762df2cf641d1c2ea8b41ce8ebe80c0ba19a46"},"schema_version":"1.0","source":{"id":"2112.04481","kind":"arxiv","version":2}},"canonical_sha256":"7c9f47f2891cd2c91b5d5623c4d7dcf515946fb5f09504d1d54351e756545518","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7c9f47f2891cd2c91b5d5623c4d7dcf515946fb5f09504d1d54351e756545518","first_computed_at":"2026-07-05T04:11:09.740867Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:11:09.740867Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1ro0xvUT8XpfimI6TE5zsh/EgOR5FUO0u/yy+HWdn2GHyyyekPwYm91rV2mizUM/kVJjnjR4d62XdmtshHDgCg==","signature_status":"signed_v1","signed_at":"2026-07-05T04:11:09.741374Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.04481","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5d61026b5c053a0abca6e5e8ec8b5c6c3a8bfbe15f95ccffe36cd20040c399ca","sha256:e4d5a3e05732924685d400c1e5438e76966b3e1c2dab64cd60f3b151f7da2843"],"state_sha256":"cbb74ce188a3679ad3c53976897d18ac0a885fc7313daddb7bd95fc21f1baad7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"db2swd5C6sSJRUfO1NcMQfGZU0ErEhObmwrU+EnmaI7RVHx/vhc+fBAJ7hBDpBWQJeF+DwL7uapkM63GSPugAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T06:55:33.266073Z","bundle_sha256":"586ab1bb3f8c3c55b4a560afaa921c304fa7c122b15c118886a4bf6708a3fb4e"}}