{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2012:HGKG6TXHUHXSR4QKIWPUQ7KFQQ","short_pith_number":"pith:HGKG6TXH","schema_version":"1.0","canonical_sha256":"39946f4ee7a1ef28f20a459f487d4584295993e29d1bae31a498fa18dfd60b90","source":{"kind":"arxiv","id":"1209.3277","version":2},"attestation_state":"computed","paper":{"title":"Dead leaves and the dirty ground: low-level image statistics in transmissive and occlusive imaging environments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["q-bio.NC"],"primary_cat":"cond-mat.stat-mech","authors_text":"David Pfau, Joel Zylberberg, Michael Robert DeWeese","submitted_at":"2012-09-14T18:42:31Z","abstract_excerpt":"The opacity of typical objects in the world results in occlusion --- an important property of natural scenes that makes inference of the full 3-dimensional structure of the world challenging. The relationship between occlusion and low-level image statistics has been hotly debated in the literature, and extensive simulations have been used to determine whether occlusion is responsible for the ubiquitously observed power-law power spectra of natural images. To deepen our understanding of this problem, we have analytically computed the 2- and 4-point functions of a generalized \"dead leaves\" model"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1209.3277","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2012-09-14T18:42:31Z","cross_cats_sorted":["q-bio.NC"],"title_canon_sha256":"8951e64ace88c8072109ad74b9ee95edc8a1edf9b7cfe7045369f8f16f2ccdbb","abstract_canon_sha256":"24a4ef7727b302aa5b4b76ecd73839edffdb844dfb8ede0cde1dcb8d5dab81dd"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:38:32.724498Z","signature_b64":"Vkf1FI6ITl0Hw+buuio8ErEh5AxMGbFZATDPO6zaJS/e1KU9rRaXljjpXuiaWkQ9PJLB8GAFfeMiGd52gFKyBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"39946f4ee7a1ef28f20a459f487d4584295993e29d1bae31a498fa18dfd60b90","last_reissued_at":"2026-05-18T03:38:32.723964Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:38:32.723964Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Dead leaves and the dirty ground: low-level image statistics in transmissive and occlusive imaging environments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["q-bio.NC"],"primary_cat":"cond-mat.stat-mech","authors_text":"David Pfau, Joel Zylberberg, Michael Robert DeWeese","submitted_at":"2012-09-14T18:42:31Z","abstract_excerpt":"The opacity of typical objects in the world results in occlusion --- an important property of natural scenes that makes inference of the full 3-dimensional structure of the world challenging. The relationship between occlusion and low-level image statistics has been hotly debated in the literature, and extensive simulations have been used to determine whether occlusion is responsible for the ubiquitously observed power-law power spectra of natural images. To deepen our understanding of this problem, we have analytically computed the 2- and 4-point functions of a generalized \"dead leaves\" model"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.3277","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1209.3277","created_at":"2026-05-18T03:38:32.724054+00:00"},{"alias_kind":"arxiv_version","alias_value":"1209.3277v2","created_at":"2026-05-18T03:38:32.724054+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.3277","created_at":"2026-05-18T03:38:32.724054+00:00"},{"alias_kind":"pith_short_12","alias_value":"HGKG6TXHUHXS","created_at":"2026-05-18T12:27:09.501522+00:00"},{"alias_kind":"pith_short_16","alias_value":"HGKG6TXHUHXSR4QK","created_at":"2026-05-18T12:27:09.501522+00:00"},{"alias_kind":"pith_short_8","alias_value":"HGKG6TXH","created_at":"2026-05-18T12:27:09.501522+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/HGKG6TXHUHXSR4QKIWPUQ7KFQQ","json":"https://pith.science/pith/HGKG6TXHUHXSR4QKIWPUQ7KFQQ.json","graph_json":"https://pith.science/api/pith-number/HGKG6TXHUHXSR4QKIWPUQ7KFQQ/graph.json","events_json":"https://pith.science/api/pith-number/HGKG6TXHUHXSR4QKIWPUQ7KFQQ/events.json","paper":"https://pith.science/paper/HGKG6TXH"},"agent_actions":{"view_html":"https://pith.science/pith/HGKG6TXHUHXSR4QKIWPUQ7KFQQ","download_json":"https://pith.science/pith/HGKG6TXHUHXSR4QKIWPUQ7KFQQ.json","view_paper":"https://pith.science/paper/HGKG6TXH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1209.3277&json=true","fetch_graph":"https://pith.science/api/pith-number/HGKG6TXHUHXSR4QKIWPUQ7KFQQ/graph.json","fetch_events":"https://pith.science/api/pith-number/HGKG6TXHUHXSR4QKIWPUQ7KFQQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HGKG6TXHUHXSR4QKIWPUQ7KFQQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HGKG6TXHUHXSR4QKIWPUQ7KFQQ/action/storage_attestation","attest_author":"https://pith.science/pith/HGKG6TXHUHXSR4QKIWPUQ7KFQQ/action/author_attestation","sign_citation":"https://pith.science/pith/HGKG6TXHUHXSR4QKIWPUQ7KFQQ/action/citation_signature","submit_replication":"https://pith.science/pith/HGKG6TXHUHXSR4QKIWPUQ7KFQQ/action/replication_record"}},"created_at":"2026-05-18T03:38:32.724054+00:00","updated_at":"2026-05-18T03:38:32.724054+00:00"}