{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:JGCAA62Q6FO6ATHMTVHSMVC7DC","short_pith_number":"pith:JGCAA62Q","canonical_record":{"source":{"id":"1608.00268","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-07-31T21:57:54Z","cross_cats_sorted":[],"title_canon_sha256":"b5dbaae43c684b5c13ff518de7740dee6f181eb43cf2b18724bb58752b93f6d4","abstract_canon_sha256":"2f8c0e63d3d0825d451f1cbbc406a966b4602fd6f80e82db5a63d42cc4b6eb48"},"schema_version":"1.0"},"canonical_sha256":"4984007b50f15de04cec9d4f26545f18b48a233446ce6c0f3562f8b925c7f9e8","source":{"kind":"arxiv","id":"1608.00268","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.00268","created_at":"2026-05-18T01:10:01Z"},{"alias_kind":"arxiv_version","alias_value":"1608.00268v1","created_at":"2026-05-18T01:10:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.00268","created_at":"2026-05-18T01:10:01Z"},{"alias_kind":"pith_short_12","alias_value":"JGCAA62Q6FO6","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JGCAA62Q6FO6ATHM","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JGCAA62Q","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:JGCAA62Q6FO6ATHMTVHSMVC7DC","target":"record","payload":{"canonical_record":{"source":{"id":"1608.00268","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-07-31T21:57:54Z","cross_cats_sorted":[],"title_canon_sha256":"b5dbaae43c684b5c13ff518de7740dee6f181eb43cf2b18724bb58752b93f6d4","abstract_canon_sha256":"2f8c0e63d3d0825d451f1cbbc406a966b4602fd6f80e82db5a63d42cc4b6eb48"},"schema_version":"1.0"},"canonical_sha256":"4984007b50f15de04cec9d4f26545f18b48a233446ce6c0f3562f8b925c7f9e8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:01.607154Z","signature_b64":"BOatDLLdK2YCCfNOVR9H/IfH3uyRFGRF1Y2rN16SmfSoQjUa2+pCCoLYsXBkvpJnjXBpDRqtWh73hSXPsyenBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4984007b50f15de04cec9d4f26545f18b48a233446ce6c0f3562f8b925c7f9e8","last_reissued_at":"2026-05-18T01:10:01.606552Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:01.606552Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1608.00268","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":"2026-05-18T01:10:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WQouKJ7diz5FBfVRAwEKG75kAiBWG4ix6RC9ijJVxGMhsipjpgTMIKs5yW//wJ7GB7OtQp7k6vUgG876XAX/Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T12:50:13.554841Z"},"content_sha256":"801b5aa08c3a710ba50aa0751f2f677669f2f8e574c7c657b33d7ea426cea77f","schema_version":"1.0","event_id":"sha256:801b5aa08c3a710ba50aa0751f2f677669f2f8e574c7c657b33d7ea426cea77f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:JGCAA62Q6FO6ATHMTVHSMVC7DC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Union is strength in lossy image compression","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Mario Mastriani","submitted_at":"2016-07-31T21:57:54Z","abstract_excerpt":"In this work, we present a comparison between different techniques of image compression. First, the image is divided in blocks which are organized according to a certain scan. Later, several compression techniques are applied, combined or alone. Such techniques are: wavelets (Haar's basis), Karhunen-Loeve Transform, etc. Simulations show that the combined versions are the best, with minor Mean Squared Error (MSE), and higher Peak Signal to Noise Ratio (PSNR) and better image quality, even in the presence of noise."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.00268","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":"2026-05-18T01:10:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kxDqu1XVVbmz6RZ4cTUI3s8mYcI6Vn95kAmDBjBECpbsfZ5ljWUVrjjri2heWI6rtaKFyggZzzSgVdWQmr6tDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-25T12:50:13.555178Z"},"content_sha256":"c01660818e13bcb9a673b6c7bf1dac5459510a8aae889182f46a4c67482e9801","schema_version":"1.0","event_id":"sha256:c01660818e13bcb9a673b6c7bf1dac5459510a8aae889182f46a4c67482e9801"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JGCAA62Q6FO6ATHMTVHSMVC7DC/bundle.json","state_url":"https://pith.science/pith/JGCAA62Q6FO6ATHMTVHSMVC7DC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JGCAA62Q6FO6ATHMTVHSMVC7DC/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":"2026-06-25T12:50:13Z","links":{"resolver":"https://pith.science/pith/JGCAA62Q6FO6ATHMTVHSMVC7DC","bundle":"https://pith.science/pith/JGCAA62Q6FO6ATHMTVHSMVC7DC/bundle.json","state":"https://pith.science/pith/JGCAA62Q6FO6ATHMTVHSMVC7DC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JGCAA62Q6FO6ATHMTVHSMVC7DC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:JGCAA62Q6FO6ATHMTVHSMVC7DC","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":"2f8c0e63d3d0825d451f1cbbc406a966b4602fd6f80e82db5a63d42cc4b6eb48","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-07-31T21:57:54Z","title_canon_sha256":"b5dbaae43c684b5c13ff518de7740dee6f181eb43cf2b18724bb58752b93f6d4"},"schema_version":"1.0","source":{"id":"1608.00268","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.00268","created_at":"2026-05-18T01:10:01Z"},{"alias_kind":"arxiv_version","alias_value":"1608.00268v1","created_at":"2026-05-18T01:10:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.00268","created_at":"2026-05-18T01:10:01Z"},{"alias_kind":"pith_short_12","alias_value":"JGCAA62Q6FO6","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JGCAA62Q6FO6ATHM","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JGCAA62Q","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:c01660818e13bcb9a673b6c7bf1dac5459510a8aae889182f46a4c67482e9801","target":"graph","created_at":"2026-05-18T01:10:01Z","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":"In this work, we present a comparison between different techniques of image compression. First, the image is divided in blocks which are organized according to a certain scan. Later, several compression techniques are applied, combined or alone. Such techniques are: wavelets (Haar's basis), Karhunen-Loeve Transform, etc. Simulations show that the combined versions are the best, with minor Mean Squared Error (MSE), and higher Peak Signal to Noise Ratio (PSNR) and better image quality, even in the presence of noise.","authors_text":"Mario Mastriani","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-07-31T21:57:54Z","title":"Union is strength in lossy image compression"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.00268","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":"sha256:801b5aa08c3a710ba50aa0751f2f677669f2f8e574c7c657b33d7ea426cea77f","target":"record","created_at":"2026-05-18T01:10:01Z","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":"2f8c0e63d3d0825d451f1cbbc406a966b4602fd6f80e82db5a63d42cc4b6eb48","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-07-31T21:57:54Z","title_canon_sha256":"b5dbaae43c684b5c13ff518de7740dee6f181eb43cf2b18724bb58752b93f6d4"},"schema_version":"1.0","source":{"id":"1608.00268","kind":"arxiv","version":1}},"canonical_sha256":"4984007b50f15de04cec9d4f26545f18b48a233446ce6c0f3562f8b925c7f9e8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4984007b50f15de04cec9d4f26545f18b48a233446ce6c0f3562f8b925c7f9e8","first_computed_at":"2026-05-18T01:10:01.606552Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:01.606552Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BOatDLLdK2YCCfNOVR9H/IfH3uyRFGRF1Y2rN16SmfSoQjUa2+pCCoLYsXBkvpJnjXBpDRqtWh73hSXPsyenBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:01.607154Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.00268","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:801b5aa08c3a710ba50aa0751f2f677669f2f8e574c7c657b33d7ea426cea77f","sha256:c01660818e13bcb9a673b6c7bf1dac5459510a8aae889182f46a4c67482e9801"],"state_sha256":"522255a45460820c166d83c322ee602547df300726bcbbb8bb22a4ed188ee75f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HR/uHAPwiLqr3q3rNh1hjCLBK2kO61FLtxFg+oacRxM/e9t5zH0y0mrca2lPYjKb2fGgdljZZxhnSMBRpNOFDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-25T12:50:13.557129Z","bundle_sha256":"c8f603d5afa09b909a5c74a1065e47ae6d4745298b4bf9e6326af77a49fb034e"}}