{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:JYWYCFWF2FYMX7SEMORJP7ZEMI","short_pith_number":"pith:JYWYCFWF","canonical_record":{"source":{"id":"1507.00410","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-07-02T02:16:42Z","cross_cats_sorted":[],"title_canon_sha256":"bd56be20e17c49af1abe0235083fa4a5b5732392247bcc141c0e1b9e49a5fa8f","abstract_canon_sha256":"890ed1a59e1033c810628f176ee74571bfccda8c1ed8b9e5f790cd220362255b"},"schema_version":"1.0"},"canonical_sha256":"4e2d8116c5d170cbfe4463a297ff246220738949edf0a907fb9456181c9666f9","source":{"kind":"arxiv","id":"1507.00410","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00410","created_at":"2026-05-18T01:32:43Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00410v2","created_at":"2026-05-18T01:32:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00410","created_at":"2026-05-18T01:32:43Z"},{"alias_kind":"pith_short_12","alias_value":"JYWYCFWF2FYM","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JYWYCFWF2FYMX7SE","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JYWYCFWF","created_at":"2026-05-18T12:29:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:JYWYCFWF2FYMX7SEMORJP7ZEMI","target":"record","payload":{"canonical_record":{"source":{"id":"1507.00410","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-07-02T02:16:42Z","cross_cats_sorted":[],"title_canon_sha256":"bd56be20e17c49af1abe0235083fa4a5b5732392247bcc141c0e1b9e49a5fa8f","abstract_canon_sha256":"890ed1a59e1033c810628f176ee74571bfccda8c1ed8b9e5f790cd220362255b"},"schema_version":"1.0"},"canonical_sha256":"4e2d8116c5d170cbfe4463a297ff246220738949edf0a907fb9456181c9666f9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:32:43.415878Z","signature_b64":"PrxJIGogOLhiKRcuH3xNYKtSYPlmq9Q3GNLwBB/vmu2wyZ7fE2FZT5XwBj1VtxAqX66nzUyJka7i9seuSNZRCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4e2d8116c5d170cbfe4463a297ff246220738949edf0a907fb9456181c9666f9","last_reissued_at":"2026-05-18T01:32:43.415513Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:32:43.415513Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.00410","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":"2026-05-18T01:32:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7enGsL3o2QDN/Ho+86aelwI8Gz+iQciGZRWsYuh0kDLkwB5OGGJCNhP9FwXbEkBtUMq38IGXCudz+cuk1TkZAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T10:18:55.570116Z"},"content_sha256":"49f32262dc63998385caa0d9c531c9688ccd742ae35a2060e9420808166c3fb7","schema_version":"1.0","event_id":"sha256:49f32262dc63998385caa0d9c531c9688ccd742ae35a2060e9420808166c3fb7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:JYWYCFWF2FYMX7SEMORJP7ZEMI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Convolutional Color Constancy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Jonathan T. Barron","submitted_at":"2015-07-02T02:16:42Z","abstract_excerpt":"Color constancy is the problem of inferring the color of the light that illuminated a scene, usually so that the illumination color can be removed. Because this problem is underconstrained, it is often solved by modeling the statistical regularities of the colors of natural objects and illumination. In contrast, in this paper we reformulate the problem of color constancy as a 2D spatial localization task in a log-chrominance space, thereby allowing us to apply techniques from object detection and structured prediction to the color constancy problem. By directly learning how to discriminate bet"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00410","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:32:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N1ivZDeEjIhizP4xLZ/3uGR9cf4yR2Pi5k+IAlDAvuwmzKcl+SwlczbAbrGEVwU1oQLNH8wPz/wSXKfkwuUbCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T10:18:55.570768Z"},"content_sha256":"73c9b784d5f692af268c1ef9fded06beab4aa7b3501fe5c702a93c23263b52ac","schema_version":"1.0","event_id":"sha256:73c9b784d5f692af268c1ef9fded06beab4aa7b3501fe5c702a93c23263b52ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JYWYCFWF2FYMX7SEMORJP7ZEMI/bundle.json","state_url":"https://pith.science/pith/JYWYCFWF2FYMX7SEMORJP7ZEMI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JYWYCFWF2FYMX7SEMORJP7ZEMI/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":"2026-06-07T10:18:55Z","links":{"resolver":"https://pith.science/pith/JYWYCFWF2FYMX7SEMORJP7ZEMI","bundle":"https://pith.science/pith/JYWYCFWF2FYMX7SEMORJP7ZEMI/bundle.json","state":"https://pith.science/pith/JYWYCFWF2FYMX7SEMORJP7ZEMI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JYWYCFWF2FYMX7SEMORJP7ZEMI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:JYWYCFWF2FYMX7SEMORJP7ZEMI","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":"890ed1a59e1033c810628f176ee74571bfccda8c1ed8b9e5f790cd220362255b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-07-02T02:16:42Z","title_canon_sha256":"bd56be20e17c49af1abe0235083fa4a5b5732392247bcc141c0e1b9e49a5fa8f"},"schema_version":"1.0","source":{"id":"1507.00410","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00410","created_at":"2026-05-18T01:32:43Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00410v2","created_at":"2026-05-18T01:32:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00410","created_at":"2026-05-18T01:32:43Z"},{"alias_kind":"pith_short_12","alias_value":"JYWYCFWF2FYM","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_16","alias_value":"JYWYCFWF2FYMX7SE","created_at":"2026-05-18T12:29:27Z"},{"alias_kind":"pith_short_8","alias_value":"JYWYCFWF","created_at":"2026-05-18T12:29:27Z"}],"graph_snapshots":[{"event_id":"sha256:73c9b784d5f692af268c1ef9fded06beab4aa7b3501fe5c702a93c23263b52ac","target":"graph","created_at":"2026-05-18T01:32:43Z","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":"Color constancy is the problem of inferring the color of the light that illuminated a scene, usually so that the illumination color can be removed. Because this problem is underconstrained, it is often solved by modeling the statistical regularities of the colors of natural objects and illumination. In contrast, in this paper we reformulate the problem of color constancy as a 2D spatial localization task in a log-chrominance space, thereby allowing us to apply techniques from object detection and structured prediction to the color constancy problem. By directly learning how to discriminate bet","authors_text":"Jonathan T. Barron","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-07-02T02:16:42Z","title":"Convolutional Color Constancy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00410","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":"sha256:49f32262dc63998385caa0d9c531c9688ccd742ae35a2060e9420808166c3fb7","target":"record","created_at":"2026-05-18T01:32:43Z","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":"890ed1a59e1033c810628f176ee74571bfccda8c1ed8b9e5f790cd220362255b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2015-07-02T02:16:42Z","title_canon_sha256":"bd56be20e17c49af1abe0235083fa4a5b5732392247bcc141c0e1b9e49a5fa8f"},"schema_version":"1.0","source":{"id":"1507.00410","kind":"arxiv","version":2}},"canonical_sha256":"4e2d8116c5d170cbfe4463a297ff246220738949edf0a907fb9456181c9666f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4e2d8116c5d170cbfe4463a297ff246220738949edf0a907fb9456181c9666f9","first_computed_at":"2026-05-18T01:32:43.415513Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:32:43.415513Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PrxJIGogOLhiKRcuH3xNYKtSYPlmq9Q3GNLwBB/vmu2wyZ7fE2FZT5XwBj1VtxAqX66nzUyJka7i9seuSNZRCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:32:43.415878Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.00410","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:49f32262dc63998385caa0d9c531c9688ccd742ae35a2060e9420808166c3fb7","sha256:73c9b784d5f692af268c1ef9fded06beab4aa7b3501fe5c702a93c23263b52ac"],"state_sha256":"cd75873c9c4fcd692da7755b628f42bd7544527e1f2c37008c3c75659fad742c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7nZLK28cGK/QNLZoxZI39eGXIG4YQZahthCURwczf4r9w2NVa0a9Vo77gQJSQlYgcXhzFxy8UmlM9vzQ7eXyCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T10:18:55.574340Z","bundle_sha256":"6b17c1d91cd159a137af05fe5db80d3369d15e2bae0447186f232aae21d29c44"}}