{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:DUD2KJYK3HFW5WQAKIPJHHNJEZ","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":"3e375dfb6731f5952532959bff5728cc7362cdfc86a668df36a6113371643e3b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2016-12-23T04:32:33Z","title_canon_sha256":"2469589c290651971f2502da42572704405c5efec7e4112cfb3d3722a6f8cf2b"},"schema_version":"1.0","source":{"id":"1612.07872","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1612.07872","created_at":"2026-05-18T00:54:05Z"},{"alias_kind":"arxiv_version","alias_value":"1612.07872v1","created_at":"2026-05-18T00:54:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1612.07872","created_at":"2026-05-18T00:54:05Z"},{"alias_kind":"pith_short_12","alias_value":"DUD2KJYK3HFW","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DUD2KJYK3HFW5WQA","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DUD2KJYK","created_at":"2026-05-18T12:30:12Z"}],"graph_snapshots":[{"event_id":"sha256:99fbf6cea69599ec2422a022b26592bb61b9e96763f684c32c1985cb818817b6","target":"graph","created_at":"2026-05-18T00:54:05Z","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":"A depth image provides partial geometric information of a 3D scene, namely the shapes of physical objects as observed from a particular viewpoint. This information is important when synthesizing images of different virtual camera viewpoints via depth-image-based rendering (DIBR). It has been shown that depth images can be efficiently coded using contour-adaptive codecs that preserve edge sharpness, resulting in visually pleasing DIBR-synthesized images. However, contours are typically losslessly coded as side information (SI), which is expensive if the object shapes are complex.\n  In this pape","authors_text":"Gene Cheung, Hong Vicky Zhao, Pascal Frossard, Patrick Le Callet, Yuan Yuan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2016-12-23T04:32:33Z","title":"Object Shape Approximation & Contour Adaptive Depth Image Coding for Virtual View Synthesis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1612.07872","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":"sha256:8dd5dcec1f189eca814a5d7cec164012e1abf409205742830ee662d5aa0769b6","target":"record","created_at":"2026-05-18T00:54:05Z","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":"3e375dfb6731f5952532959bff5728cc7362cdfc86a668df36a6113371643e3b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2016-12-23T04:32:33Z","title_canon_sha256":"2469589c290651971f2502da42572704405c5efec7e4112cfb3d3722a6f8cf2b"},"schema_version":"1.0","source":{"id":"1612.07872","kind":"arxiv","version":1}},"canonical_sha256":"1d07a5270ad9cb6eda00521e939da9267eb53d22a8b8973606e6283c16366d46","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1d07a5270ad9cb6eda00521e939da9267eb53d22a8b8973606e6283c16366d46","first_computed_at":"2026-05-18T00:54:05.504546Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:54:05.504546Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e7/85TAB90orTkN2/JmR3PvszjxikhuFpxb+b8sVMP0sexjWxdUEf9idrSnw5iSNy4Q25y3P2i2ZoN2NHZ16Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:54:05.505023Z","signed_message":"canonical_sha256_bytes"},"source_id":"1612.07872","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8dd5dcec1f189eca814a5d7cec164012e1abf409205742830ee662d5aa0769b6","sha256:99fbf6cea69599ec2422a022b26592bb61b9e96763f684c32c1985cb818817b6"],"state_sha256":"9d00e5090fc08e8f96120bf97f4e4353381d114192588dc7ec433b7b16339b6c"}