{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:MWMJJSKLOZ5WMGW4S7T2RHWS4Y","short_pith_number":"pith:MWMJJSKL","canonical_record":{"source":{"id":"2608.08487","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T05:07:56Z","cross_cats_sorted":[],"title_canon_sha256":"81a0ef181a963041c1924accc9ae4e47e7a7112b4c13756e13249e7c60f5fbbc","abstract_canon_sha256":"be8dfe635115ceb314e2348b6a4494a705c37a7ebbb0feb658cfdaa981138be5"},"schema_version":"1.0"},"canonical_sha256":"659894c94b767b661adc97e7a89ed2e62ca19b0ddfde6edcc19c388faa257679","source":{"kind":"arxiv","id":"2608.08487","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.08487","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"arxiv_version","alias_value":"2608.08487v1","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.08487","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"pith_short_12","alias_value":"MWMJJSKLOZ5W","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"pith_short_16","alias_value":"MWMJJSKLOZ5WMGW4","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"pith_short_8","alias_value":"MWMJJSKL","created_at":"2026-08-11T01:22:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:MWMJJSKLOZ5WMGW4S7T2RHWS4Y","target":"record","payload":{"canonical_record":{"source":{"id":"2608.08487","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T05:07:56Z","cross_cats_sorted":[],"title_canon_sha256":"81a0ef181a963041c1924accc9ae4e47e7a7112b4c13756e13249e7c60f5fbbc","abstract_canon_sha256":"be8dfe635115ceb314e2348b6a4494a705c37a7ebbb0feb658cfdaa981138be5"},"schema_version":"1.0"},"canonical_sha256":"659894c94b767b661adc97e7a89ed2e62ca19b0ddfde6edcc19c388faa257679","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-11T01:22:45.860855Z","signature_b64":"kwGvcO7kqAyFambfQed/W30lxLa4SBK5Tk5TCeA5JCTAk33Vyud3912Y2Qujfrtqj72fTQLZMpUQOdZ1fxx6Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"659894c94b767b661adc97e7a89ed2e62ca19b0ddfde6edcc19c388faa257679","last_reissued_at":"2026-08-11T01:22:45.858210Z","signature_status":"signed_v1","first_computed_at":"2026-08-11T01:22:45.858210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.08487","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":"2026-08-11T01:22:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kvyw17dJzMZCRMYSAhcx/fzh17XkkBOSEbepKa1qzTukmQ2uQR2SnfqJhv9rtG5rNWuQFeI45eqfpAlqiNVRAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T15:20:45.051020Z"},"content_sha256":"46696c490df37e99d8108f383600413b7b387037195aa177058c7c6a19e54abf","schema_version":"1.0","event_id":"sha256:46696c490df37e99d8108f383600413b7b387037195aa177058c7c6a19e54abf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:MWMJJSKLOZ5WMGW4S7T2RHWS4Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"RenderMatte: Exact-Alpha Rendering and Group-Relative Alignment for Image Matting","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Jianing Zhao, Qun Jin, Ruichen Cong, Yafei Hu, Yiren Song, Zecheng Ren","submitted_at":"2026-08-09T05:07:56Z","abstract_excerpt":"Image matting is an essential enabling technology for modern visual content production, where foreground extraction determines the realism and editability of downstream creation workflows. However, precise alpha estimation in open-world scenes remains challenging because real foregrounds exhibit highly diverse appearances and opacity patterns. This makes existing methods struggle with semantic ambiguity and fine-grained opacity variation, especially in sparse boundary regions that are fragile and difficult to supervise. To address this gap, we present RenderMatte, a trimap-guided matting frame"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.08487","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2608.08487/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":"2026-08-11T01:22:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0zA9ve1IQ077mzHTwN/ieTQ4gqATWG2kMEiQEJ7HEnuOGeh5Lr2ZcGTtDfHTipILBZ/AulWD2S2TChcKL1VCAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T15:20:45.051585Z"},"content_sha256":"e6ebfeb70dd1800612e1e061cb9fb35dcb98f58b4504891a38859901f23956fe","schema_version":"1.0","event_id":"sha256:e6ebfeb70dd1800612e1e061cb9fb35dcb98f58b4504891a38859901f23956fe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MWMJJSKLOZ5WMGW4S7T2RHWS4Y/bundle.json","state_url":"https://pith.science/pith/MWMJJSKLOZ5WMGW4S7T2RHWS4Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MWMJJSKLOZ5WMGW4S7T2RHWS4Y/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":"2026-08-19T15:20:45Z","links":{"resolver":"https://pith.science/pith/MWMJJSKLOZ5WMGW4S7T2RHWS4Y","bundle":"https://pith.science/pith/MWMJJSKLOZ5WMGW4S7T2RHWS4Y/bundle.json","state":"https://pith.science/pith/MWMJJSKLOZ5WMGW4S7T2RHWS4Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MWMJJSKLOZ5WMGW4S7T2RHWS4Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:MWMJJSKLOZ5WMGW4S7T2RHWS4Y","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":"be8dfe635115ceb314e2348b6a4494a705c37a7ebbb0feb658cfdaa981138be5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T05:07:56Z","title_canon_sha256":"81a0ef181a963041c1924accc9ae4e47e7a7112b4c13756e13249e7c60f5fbbc"},"schema_version":"1.0","source":{"id":"2608.08487","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.08487","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"arxiv_version","alias_value":"2608.08487v1","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.08487","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"pith_short_12","alias_value":"MWMJJSKLOZ5W","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"pith_short_16","alias_value":"MWMJJSKLOZ5WMGW4","created_at":"2026-08-11T01:22:45Z"},{"alias_kind":"pith_short_8","alias_value":"MWMJJSKL","created_at":"2026-08-11T01:22:45Z"}],"graph_snapshots":[{"event_id":"sha256:e6ebfeb70dd1800612e1e061cb9fb35dcb98f58b4504891a38859901f23956fe","target":"graph","created_at":"2026-08-11T01:22:45Z","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/2608.08487/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Image matting is an essential enabling technology for modern visual content production, where foreground extraction determines the realism and editability of downstream creation workflows. However, precise alpha estimation in open-world scenes remains challenging because real foregrounds exhibit highly diverse appearances and opacity patterns. This makes existing methods struggle with semantic ambiguity and fine-grained opacity variation, especially in sparse boundary regions that are fragile and difficult to supervise. To address this gap, we present RenderMatte, a trimap-guided matting frame","authors_text":"Jianing Zhao, Qun Jin, Ruichen Cong, Yafei Hu, Yiren Song, Zecheng Ren","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T05:07:56Z","title":"RenderMatte: Exact-Alpha Rendering and Group-Relative Alignment for Image Matting"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.08487","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":"sha256:46696c490df37e99d8108f383600413b7b387037195aa177058c7c6a19e54abf","target":"record","created_at":"2026-08-11T01:22:45Z","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":"be8dfe635115ceb314e2348b6a4494a705c37a7ebbb0feb658cfdaa981138be5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T05:07:56Z","title_canon_sha256":"81a0ef181a963041c1924accc9ae4e47e7a7112b4c13756e13249e7c60f5fbbc"},"schema_version":"1.0","source":{"id":"2608.08487","kind":"arxiv","version":1}},"canonical_sha256":"659894c94b767b661adc97e7a89ed2e62ca19b0ddfde6edcc19c388faa257679","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"659894c94b767b661adc97e7a89ed2e62ca19b0ddfde6edcc19c388faa257679","first_computed_at":"2026-08-11T01:22:45.858210Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-11T01:22:45.858210Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kwGvcO7kqAyFambfQed/W30lxLa4SBK5Tk5TCeA5JCTAk33Vyud3912Y2Qujfrtqj72fTQLZMpUQOdZ1fxx6Dw==","signature_status":"signed_v1","signed_at":"2026-08-11T01:22:45.860855Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.08487","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:46696c490df37e99d8108f383600413b7b387037195aa177058c7c6a19e54abf","sha256:e6ebfeb70dd1800612e1e061cb9fb35dcb98f58b4504891a38859901f23956fe"],"state_sha256":"7360b0992a8e64c20de8619f480698e2f36db4c5a683a7e3900c3c489f392f69"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xVfyHP2cA12KLZki3SxQqYdXth2/iZ2PTJSU46hmiWDUva0Die6GkiidewM2zrkMYtRaAHMkXboY33duOfufCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T15:20:45.057041Z","bundle_sha256":"efab718850137062619515a214186b21e177a90384cf4ddd8dd4d5a2a7036bd4"}}