{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:VAV7PNA74CMMLLDI6YZLXNRYB3","short_pith_number":"pith:VAV7PNA7","canonical_record":{"source":{"id":"2608.13183","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-13T12:47:36Z","cross_cats_sorted":[],"title_canon_sha256":"5ab9454130f7be0f9d7fb3b7f5dacfd60f7dc38860f28879086d59f79f5d9ed6","abstract_canon_sha256":"1211f8e18d10aa047d7ad3eae012d3187c5b9d7bae11943f2c9c4d0e34aeacff"},"schema_version":"1.0"},"canonical_sha256":"a82bf7b41fe098c5ac68f632bbb6380ee087b04a58cd49a279baff80b011e4b6","source":{"kind":"arxiv","id":"2608.13183","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.13183","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"arxiv_version","alias_value":"2608.13183v1","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.13183","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"pith_short_12","alias_value":"VAV7PNA74CMM","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"pith_short_16","alias_value":"VAV7PNA74CMMLLDI","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"pith_short_8","alias_value":"VAV7PNA7","created_at":"2026-08-14T01:00:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:VAV7PNA74CMMLLDI6YZLXNRYB3","target":"record","payload":{"canonical_record":{"source":{"id":"2608.13183","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-13T12:47:36Z","cross_cats_sorted":[],"title_canon_sha256":"5ab9454130f7be0f9d7fb3b7f5dacfd60f7dc38860f28879086d59f79f5d9ed6","abstract_canon_sha256":"1211f8e18d10aa047d7ad3eae012d3187c5b9d7bae11943f2c9c4d0e34aeacff"},"schema_version":"1.0"},"canonical_sha256":"a82bf7b41fe098c5ac68f632bbb6380ee087b04a58cd49a279baff80b011e4b6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-14T01:00:36.688361Z","signature_b64":"PK2EC4/tsnmP7+o4UehUB1LCRVTtkHjgiuKV2ePwhqj6FGtYYoFs8bN4dd/5vj8xh/Jh3IvkpFLe6hGxEwZQBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a82bf7b41fe098c5ac68f632bbb6380ee087b04a58cd49a279baff80b011e4b6","last_reissued_at":"2026-08-14T01:00:36.686417Z","signature_status":"signed_v1","first_computed_at":"2026-08-14T01:00:36.686417Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.13183","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":"2026-08-14T01:00:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"04zNxlLEjpp/zHJzX+CS5bXWBStrvceMl/ZNcfgBfQts238gZ0ZmmgB038KH+bPLNXy++aW7eaA7qKdc5sFoCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T19:07:05.527320Z"},"content_sha256":"e23d29a1031d31211315b01647d7b875ac94d1a4f804c20972dd060d5faf6a52","schema_version":"1.0","event_id":"sha256:e23d29a1031d31211315b01647d7b875ac94d1a4f804c20972dd060d5faf6a52"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:VAV7PNA74CMMLLDI6YZLXNRYB3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Controlled Study of Self-Supervised Image and Video Pretraining under Limited Resources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Brun\\'o B. Englert, Gijs Dubbelman","submitted_at":"2026-08-13T12:47:36Z","abstract_excerpt":"Visual foundation models are a cornerstone of image and video understanding but typically require large amounts of data and computation. The current scale required for pretraining visual foundation models may be unsustainable or unnecessary, and significant benefits arise when effective models can be obtained with fewer resources. To better understand how self-supervised learning (SSL) objectives behave under resource constraints, we conduct a controlled study of image and video SSL objectives under matched data, architecture, and compute budgets. We compare contrastive, reconstruction, featur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.13183","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/2608.13183/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":"2026-08-14T01:00:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TBWHLBsZbHIt8mq3lhbUZfXozX7EEgZ/VGmHIrJ5oZMAgRh6p2cP+LqHo+3zsjMfHFaB4bVxDD1bSmsDS+DHBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T19:07:05.527898Z"},"content_sha256":"20141ac6ed9b79839403751dabb6b2c6472fa684757d2dcb7da5fed46766a4ec","schema_version":"1.0","event_id":"sha256:20141ac6ed9b79839403751dabb6b2c6472fa684757d2dcb7da5fed46766a4ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VAV7PNA74CMMLLDI6YZLXNRYB3/bundle.json","state_url":"https://pith.science/pith/VAV7PNA74CMMLLDI6YZLXNRYB3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VAV7PNA74CMMLLDI6YZLXNRYB3/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":"2026-08-23T19:07:05Z","links":{"resolver":"https://pith.science/pith/VAV7PNA74CMMLLDI6YZLXNRYB3","bundle":"https://pith.science/pith/VAV7PNA74CMMLLDI6YZLXNRYB3/bundle.json","state":"https://pith.science/pith/VAV7PNA74CMMLLDI6YZLXNRYB3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VAV7PNA74CMMLLDI6YZLXNRYB3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:VAV7PNA74CMMLLDI6YZLXNRYB3","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":"1211f8e18d10aa047d7ad3eae012d3187c5b9d7bae11943f2c9c4d0e34aeacff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-13T12:47:36Z","title_canon_sha256":"5ab9454130f7be0f9d7fb3b7f5dacfd60f7dc38860f28879086d59f79f5d9ed6"},"schema_version":"1.0","source":{"id":"2608.13183","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.13183","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"arxiv_version","alias_value":"2608.13183v1","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.13183","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"pith_short_12","alias_value":"VAV7PNA74CMM","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"pith_short_16","alias_value":"VAV7PNA74CMMLLDI","created_at":"2026-08-14T01:00:36Z"},{"alias_kind":"pith_short_8","alias_value":"VAV7PNA7","created_at":"2026-08-14T01:00:36Z"}],"graph_snapshots":[{"event_id":"sha256:20141ac6ed9b79839403751dabb6b2c6472fa684757d2dcb7da5fed46766a4ec","target":"graph","created_at":"2026-08-14T01:00:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2608.13183/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Visual foundation models are a cornerstone of image and video understanding but typically require large amounts of data and computation. The current scale required for pretraining visual foundation models may be unsustainable or unnecessary, and significant benefits arise when effective models can be obtained with fewer resources. To better understand how self-supervised learning (SSL) objectives behave under resource constraints, we conduct a controlled study of image and video SSL objectives under matched data, architecture, and compute budgets. We compare contrastive, reconstruction, featur","authors_text":"Brun\\'o B. Englert, Gijs Dubbelman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-13T12:47:36Z","title":"A Controlled Study of Self-Supervised Image and Video Pretraining under Limited Resources"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.13183","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:e23d29a1031d31211315b01647d7b875ac94d1a4f804c20972dd060d5faf6a52","target":"record","created_at":"2026-08-14T01:00:36Z","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":"1211f8e18d10aa047d7ad3eae012d3187c5b9d7bae11943f2c9c4d0e34aeacff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-13T12:47:36Z","title_canon_sha256":"5ab9454130f7be0f9d7fb3b7f5dacfd60f7dc38860f28879086d59f79f5d9ed6"},"schema_version":"1.0","source":{"id":"2608.13183","kind":"arxiv","version":1}},"canonical_sha256":"a82bf7b41fe098c5ac68f632bbb6380ee087b04a58cd49a279baff80b011e4b6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a82bf7b41fe098c5ac68f632bbb6380ee087b04a58cd49a279baff80b011e4b6","first_computed_at":"2026-08-14T01:00:36.686417Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-14T01:00:36.686417Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PK2EC4/tsnmP7+o4UehUB1LCRVTtkHjgiuKV2ePwhqj6FGtYYoFs8bN4dd/5vj8xh/Jh3IvkpFLe6hGxEwZQBg==","signature_status":"signed_v1","signed_at":"2026-08-14T01:00:36.688361Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.13183","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e23d29a1031d31211315b01647d7b875ac94d1a4f804c20972dd060d5faf6a52","sha256:20141ac6ed9b79839403751dabb6b2c6472fa684757d2dcb7da5fed46766a4ec"],"state_sha256":"b02dd46ee03c05dde4bf10da14b5465529dd1e05470d08df21bb3f01f9a7360a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6O+IjggFa+LDVEqRz5lvXgO06y66mc2vGAO3jZ1QMhfgWzQ/dWcj+YF8OC4trZCqBQn7IbZQfRSbDd8nM2IdAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T19:07:05.531969Z","bundle_sha256":"245f65cae1f019c408a221def543e62fad018bd8f56cedfd9ab11939b18cde7d"}}