{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:N7FVY35ZT4L5KDCHQI5ADZMQCN","short_pith_number":"pith:N7FVY35Z","canonical_record":{"source":{"id":"1309.4385","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-09-17T16:51:32Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"060636e76b5bbdc21375e5049090322f6c8a23ae728e4da8b50a7ade289d9bbe","abstract_canon_sha256":"9e19ccd9e40e4a83a74b48f9762bed2fd83d0afca939062eb3570ca959c53985"},"schema_version":"1.0"},"canonical_sha256":"6fcb5c6fb99f17d50c47823a01e590136ce07da18438725930e524565fd411b9","source":{"kind":"arxiv","id":"1309.4385","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.4385","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"arxiv_version","alias_value":"1309.4385v1","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.4385","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"pith_short_12","alias_value":"N7FVY35ZT4L5","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"N7FVY35ZT4L5KDCH","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"N7FVY35Z","created_at":"2026-05-18T12:27:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:N7FVY35ZT4L5KDCHQI5ADZMQCN","target":"record","payload":{"canonical_record":{"source":{"id":"1309.4385","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-09-17T16:51:32Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"060636e76b5bbdc21375e5049090322f6c8a23ae728e4da8b50a7ade289d9bbe","abstract_canon_sha256":"9e19ccd9e40e4a83a74b48f9762bed2fd83d0afca939062eb3570ca959c53985"},"schema_version":"1.0"},"canonical_sha256":"6fcb5c6fb99f17d50c47823a01e590136ce07da18438725930e524565fd411b9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:36.429578Z","signature_b64":"9AeM8rzl5UcQH57fMi4G6a3w8wWRprdxGR7zwUJvl5pLhHMevP0NWC+7Q0MBd5eHyUr4gGyyPzCMzlFruJvzAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6fcb5c6fb99f17d50c47823a01e590136ce07da18438725930e524565fd411b9","last_reissued_at":"2026-05-18T01:47:36.429034Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:36.429034Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.4385","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":"2026-05-18T01:47:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0fYPRp6rXe9eHvIWWlcaSHopegNQU2WT/Am1Y4MovsUwcEeu6uqDmtxOe/ahqTw8wCnpmfgYJku7brhfejcRDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:52:21.900616Z"},"content_sha256":"ade7f909f24d8400f46f339195781c1fb1693ea5be09230c97c98103bb8b7ba0","schema_version":"1.0","event_id":"sha256:ade7f909f24d8400f46f339195781c1fb1693ea5be09230c97c98103bb8b7ba0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:N7FVY35ZT4L5KDCHQI5ADZMQCN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photon counting compressive depth mapping","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"physics.optics","authors_text":"Daniel J. Lum, Gregory A. Howland, John C. Howell, Matthew R. Ware","submitted_at":"2013-09-17T16:51:32Z","abstract_excerpt":"We demonstrate a compressed sensing, photon counting lidar system based on the single-pixel camera. Our technique recovers both depth and intensity maps from a single under-sampled set of incoherent, linear projections of a scene of interest at ultra-low light levels around 0.5 picowatts. Only two-dimensional reconstructions are required to image a three-dimensional scene. We demonstrate intensity imaging and depth mapping at 256 x 256 pixel transverse resolution with acquisition times as short as 3 seconds. We also show novelty filtering, reconstructing only the difference between two instanc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4385","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":"2026-05-18T01:47:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DS1qxZbGdBzTeQwSI26Ypb5ExqtwUO024CoPIAXCy+OhRK+edYVSYlHbMU9eUqZBgD1v9hmZH0ClQ3WNP0MoBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T04:52:21.901307Z"},"content_sha256":"ade1dc5e86d3633c5bf1f9166c41f524dfe3c02719001eaedcee071b5d01bab7","schema_version":"1.0","event_id":"sha256:ade1dc5e86d3633c5bf1f9166c41f524dfe3c02719001eaedcee071b5d01bab7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/N7FVY35ZT4L5KDCHQI5ADZMQCN/bundle.json","state_url":"https://pith.science/pith/N7FVY35ZT4L5KDCHQI5ADZMQCN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/N7FVY35ZT4L5KDCHQI5ADZMQCN/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":"2026-05-31T04:52:21Z","links":{"resolver":"https://pith.science/pith/N7FVY35ZT4L5KDCHQI5ADZMQCN","bundle":"https://pith.science/pith/N7FVY35ZT4L5KDCHQI5ADZMQCN/bundle.json","state":"https://pith.science/pith/N7FVY35ZT4L5KDCHQI5ADZMQCN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/N7FVY35ZT4L5KDCHQI5ADZMQCN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:N7FVY35ZT4L5KDCHQI5ADZMQCN","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":"9e19ccd9e40e4a83a74b48f9762bed2fd83d0afca939062eb3570ca959c53985","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-09-17T16:51:32Z","title_canon_sha256":"060636e76b5bbdc21375e5049090322f6c8a23ae728e4da8b50a7ade289d9bbe"},"schema_version":"1.0","source":{"id":"1309.4385","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.4385","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"arxiv_version","alias_value":"1309.4385v1","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.4385","created_at":"2026-05-18T01:47:36Z"},{"alias_kind":"pith_short_12","alias_value":"N7FVY35ZT4L5","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"N7FVY35ZT4L5KDCH","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"N7FVY35Z","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:ade1dc5e86d3633c5bf1f9166c41f524dfe3c02719001eaedcee071b5d01bab7","target":"graph","created_at":"2026-05-18T01:47:36Z","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":"We demonstrate a compressed sensing, photon counting lidar system based on the single-pixel camera. Our technique recovers both depth and intensity maps from a single under-sampled set of incoherent, linear projections of a scene of interest at ultra-low light levels around 0.5 picowatts. Only two-dimensional reconstructions are required to image a three-dimensional scene. We demonstrate intensity imaging and depth mapping at 256 x 256 pixel transverse resolution with acquisition times as short as 3 seconds. We also show novelty filtering, reconstructing only the difference between two instanc","authors_text":"Daniel J. Lum, Gregory A. Howland, John C. Howell, Matthew R. Ware","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-09-17T16:51:32Z","title":"Photon counting compressive depth mapping"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4385","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:ade7f909f24d8400f46f339195781c1fb1693ea5be09230c97c98103bb8b7ba0","target":"record","created_at":"2026-05-18T01:47:36Z","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":"9e19ccd9e40e4a83a74b48f9762bed2fd83d0afca939062eb3570ca959c53985","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2013-09-17T16:51:32Z","title_canon_sha256":"060636e76b5bbdc21375e5049090322f6c8a23ae728e4da8b50a7ade289d9bbe"},"schema_version":"1.0","source":{"id":"1309.4385","kind":"arxiv","version":1}},"canonical_sha256":"6fcb5c6fb99f17d50c47823a01e590136ce07da18438725930e524565fd411b9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6fcb5c6fb99f17d50c47823a01e590136ce07da18438725930e524565fd411b9","first_computed_at":"2026-05-18T01:47:36.429034Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:36.429034Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9AeM8rzl5UcQH57fMi4G6a3w8wWRprdxGR7zwUJvl5pLhHMevP0NWC+7Q0MBd5eHyUr4gGyyPzCMzlFruJvzAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:36.429578Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.4385","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ade7f909f24d8400f46f339195781c1fb1693ea5be09230c97c98103bb8b7ba0","sha256:ade1dc5e86d3633c5bf1f9166c41f524dfe3c02719001eaedcee071b5d01bab7"],"state_sha256":"bab53a7048f784eb4ba7f620c6b981afc5e241f311e9ffe9f50b57d9a869ca15"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cbh8qLHphCI9EKXhhX2zdIM/LO1FUIAdD1CPKGqAcQ2NxoV08jEPZ4YmGUr4CAGxZJG0AMRkRbsH1uy9ID0rDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T04:52:21.904950Z","bundle_sha256":"9ec57089305a557d384e7b229cf1c467cfd6ee73c83e35ffee84c628f3039e70"}}