{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:IFH53KSWV2LYFRK76VBUAMVSHE","short_pith_number":"pith:IFH53KSW","canonical_record":{"source":{"id":"1505.01085","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-05-05T17:11:26Z","cross_cats_sorted":[],"title_canon_sha256":"4ae51002ba061deca1964b5be9edbcbd8129046aaf24a6661ae60664a4adf6bf","abstract_canon_sha256":"e9ebd4158aca831ad1c61ec0f1deb8311b45095bec4210740a89374adc2a8edc"},"schema_version":"1.0"},"canonical_sha256":"414fddaa56ae9782c55ff5434032b2390153940826dce1a3a91f2410660d2470","source":{"kind":"arxiv","id":"1505.01085","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01085","created_at":"2026-05-18T02:16:51Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01085v1","created_at":"2026-05-18T02:16:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01085","created_at":"2026-05-18T02:16:51Z"},{"alias_kind":"pith_short_12","alias_value":"IFH53KSWV2LY","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IFH53KSWV2LYFRK7","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IFH53KSW","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:IFH53KSWV2LYFRK76VBUAMVSHE","target":"record","payload":{"canonical_record":{"source":{"id":"1505.01085","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-05-05T17:11:26Z","cross_cats_sorted":[],"title_canon_sha256":"4ae51002ba061deca1964b5be9edbcbd8129046aaf24a6661ae60664a4adf6bf","abstract_canon_sha256":"e9ebd4158aca831ad1c61ec0f1deb8311b45095bec4210740a89374adc2a8edc"},"schema_version":"1.0"},"canonical_sha256":"414fddaa56ae9782c55ff5434032b2390153940826dce1a3a91f2410660d2470","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:16:51.998479Z","signature_b64":"iGVcfa0zO876VDwon6nERYu8621u3wMy1BAPaYD4j8vpr4CqCF2rTHYnprfL4CWffzJPOqiTspu9fz2ibRdbAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"414fddaa56ae9782c55ff5434032b2390153940826dce1a3a91f2410660d2470","last_reissued_at":"2026-05-18T02:16:51.997656Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:16:51.997656Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.01085","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":"2026-05-18T02:16:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"69NShBL8imB9cAlu8ei6pX73xEABkvPWdLQC50D8JobF6dtBP543KDCWZI99+UdOESCChhF8fRj1DzrXnt1RCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:20:34.501377Z"},"content_sha256":"a655ae6d6b4e1eb66ebf00b241139707fe3416bfe39446d54911d875c32363ce","schema_version":"1.0","event_id":"sha256:a655ae6d6b4e1eb66ebf00b241139707fe3416bfe39446d54911d875c32363ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:IFH53KSWV2LYFRK76VBUAMVSHE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"In Defense of the Direct Perception of Affordances","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Abhinav Gupta, David F. Fouhey, Xiaolong Wang","submitted_at":"2015-05-05T17:11:26Z","abstract_excerpt":"The field of functional recognition or affordance estimation from images has seen a revival in recent years. As originally proposed by Gibson, the affordances of a scene were directly perceived from the ambient light: in other words, functional properties like sittable were estimated directly from incoming pixels. Recent work, however, has taken a mediated approach in which affordances are derived by first estimating semantics or geometry and then reasoning about the affordances. In a tribute to Gibson, this paper explores his theory of affordances as originally proposed. We propose two approa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01085","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":""},"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":"2026-05-18T02:16:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BeIgW/DvdmxKKbUqrzpUjQssiLN7mb7zgyEpj8PlXJFaY53F2LNz5CybTN/8pr5hkQzkp9Mc0aJ7ZH07F0xiAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T13:20:34.502092Z"},"content_sha256":"53478747eeb9cd7dc5b1f6b8bc22b8dc45635436a30e4714f01e77752898e323","schema_version":"1.0","event_id":"sha256:53478747eeb9cd7dc5b1f6b8bc22b8dc45635436a30e4714f01e77752898e323"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IFH53KSWV2LYFRK76VBUAMVSHE/bundle.json","state_url":"https://pith.science/pith/IFH53KSWV2LYFRK76VBUAMVSHE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IFH53KSWV2LYFRK76VBUAMVSHE/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":"2026-05-25T13:20:34Z","links":{"resolver":"https://pith.science/pith/IFH53KSWV2LYFRK76VBUAMVSHE","bundle":"https://pith.science/pith/IFH53KSWV2LYFRK76VBUAMVSHE/bundle.json","state":"https://pith.science/pith/IFH53KSWV2LYFRK76VBUAMVSHE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IFH53KSWV2LYFRK76VBUAMVSHE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IFH53KSWV2LYFRK76VBUAMVSHE","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":"e9ebd4158aca831ad1c61ec0f1deb8311b45095bec4210740a89374adc2a8edc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-05-05T17:11:26Z","title_canon_sha256":"4ae51002ba061deca1964b5be9edbcbd8129046aaf24a6661ae60664a4adf6bf"},"schema_version":"1.0","source":{"id":"1505.01085","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01085","created_at":"2026-05-18T02:16:51Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01085v1","created_at":"2026-05-18T02:16:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01085","created_at":"2026-05-18T02:16:51Z"},{"alias_kind":"pith_short_12","alias_value":"IFH53KSWV2LY","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IFH53KSWV2LYFRK7","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IFH53KSW","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:53478747eeb9cd7dc5b1f6b8bc22b8dc45635436a30e4714f01e77752898e323","target":"graph","created_at":"2026-05-18T02:16:51Z","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":"The field of functional recognition or affordance estimation from images has seen a revival in recent years. As originally proposed by Gibson, the affordances of a scene were directly perceived from the ambient light: in other words, functional properties like sittable were estimated directly from incoming pixels. Recent work, however, has taken a mediated approach in which affordances are derived by first estimating semantics or geometry and then reasoning about the affordances. In a tribute to Gibson, this paper explores his theory of affordances as originally proposed. We propose two approa","authors_text":"Abhinav Gupta, David F. Fouhey, Xiaolong Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-05-05T17:11:26Z","title":"In Defense of the Direct Perception of Affordances"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01085","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:a655ae6d6b4e1eb66ebf00b241139707fe3416bfe39446d54911d875c32363ce","target":"record","created_at":"2026-05-18T02:16:51Z","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":"e9ebd4158aca831ad1c61ec0f1deb8311b45095bec4210740a89374adc2a8edc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-05-05T17:11:26Z","title_canon_sha256":"4ae51002ba061deca1964b5be9edbcbd8129046aaf24a6661ae60664a4adf6bf"},"schema_version":"1.0","source":{"id":"1505.01085","kind":"arxiv","version":1}},"canonical_sha256":"414fddaa56ae9782c55ff5434032b2390153940826dce1a3a91f2410660d2470","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"414fddaa56ae9782c55ff5434032b2390153940826dce1a3a91f2410660d2470","first_computed_at":"2026-05-18T02:16:51.997656Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:16:51.997656Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iGVcfa0zO876VDwon6nERYu8621u3wMy1BAPaYD4j8vpr4CqCF2rTHYnprfL4CWffzJPOqiTspu9fz2ibRdbAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:16:51.998479Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.01085","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a655ae6d6b4e1eb66ebf00b241139707fe3416bfe39446d54911d875c32363ce","sha256:53478747eeb9cd7dc5b1f6b8bc22b8dc45635436a30e4714f01e77752898e323"],"state_sha256":"bc56b8534fbc7796b85b155cdb5a6374d518712102b2d3b718b354d9c6a37a09"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"siZQSC2wWu2SIY4L+BjsjRosi/+qmLi2I29+nnG/zoODwYzd4HRG7YPZAjth6wTRTFniL8VnLffLf0hbdxyTDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T13:20:34.505630Z","bundle_sha256":"57cb15935468d7820ba47b60a0f876829c1da527d6fb2191e7534fc706197034"}}