{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:MM2AJ4PZ57HAOOYYGBDQ3IW5KA","short_pith_number":"pith:MM2AJ4PZ","canonical_record":{"source":{"id":"1604.08826","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-04-29T13:39:40Z","cross_cats_sorted":[],"title_canon_sha256":"7a32344ff375c355f8ae74d521e607bb64269d4efb303577522a4908b1c60003","abstract_canon_sha256":"69b1a9fec14bb4e59eb3dbfc7281e8e6dfdd22939f200bcdb885e3eff4f22e69"},"schema_version":"1.0"},"canonical_sha256":"633404f1f9efce073b1830470da2dd5017e7a52dc4f388e4bc75db17d30c70d2","source":{"kind":"arxiv","id":"1604.08826","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.08826","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"arxiv_version","alias_value":"1604.08826v1","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.08826","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"pith_short_12","alias_value":"MM2AJ4PZ57HA","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MM2AJ4PZ57HAOOYY","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MM2AJ4PZ","created_at":"2026-05-18T12:30:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:MM2AJ4PZ57HAOOYYGBDQ3IW5KA","target":"record","payload":{"canonical_record":{"source":{"id":"1604.08826","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-04-29T13:39:40Z","cross_cats_sorted":[],"title_canon_sha256":"7a32344ff375c355f8ae74d521e607bb64269d4efb303577522a4908b1c60003","abstract_canon_sha256":"69b1a9fec14bb4e59eb3dbfc7281e8e6dfdd22939f200bcdb885e3eff4f22e69"},"schema_version":"1.0"},"canonical_sha256":"633404f1f9efce073b1830470da2dd5017e7a52dc4f388e4bc75db17d30c70d2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:01.608541Z","signature_b64":"1AOs7KIJW/lQN9WPW+VTGmpYGFPlf8OY8WC+xZYNb2kSAzm0dG6ns8xFhWBqylKBdPw5fY6P4gHSpr2yPOm1Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"633404f1f9efce073b1830470da2dd5017e7a52dc4f388e4bc75db17d30c70d2","last_reissued_at":"2026-05-18T01:16:01.608022Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:01.608022Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.08826","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":"2026-05-18T01:16:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fDSrL6l7sRZEKfMZGQOlbVe0C3U670VOfeU+zPoHS698Pxsa/4Z6YIIpoIu4mnfmNsC0mbgTG7ubymF5yHC5Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T23:14:48.589721Z"},"content_sha256":"58be8a27e3c63a39119e155fc4c13c08393b1e263e1652a41680d23b36b41e22","schema_version":"1.0","event_id":"sha256:58be8a27e3c63a39119e155fc4c13c08393b1e263e1652a41680d23b36b41e22"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:MM2AJ4PZ57HAOOYYGBDQ3IW5KA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improved Dense Trajectory with Cross Streams","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Katsunori Ohnishi, Masatoshi Hidaka, Tatsuya Harada","submitted_at":"2016-04-29T13:39:40Z","abstract_excerpt":"Improved dense trajectories (iDT) have shown great performance in action recognition, and their combination with the two-stream approach has achieved state-of-the-art performance. It is, however, difficult for iDT to completely remove background trajectories from video with camera shaking. Trajectories in less discriminative regions should be given modest weights in order to create more discriminative local descriptors for action recognition. In addition, the two-stream approach, which learns appearance and motion information separately, cannot focus on motion in important regions when extract"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.08826","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":"2026-05-18T01:16:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nDBh5kbmuc3fqnX12Mv0qeHOCOL/rrD+LQjGBVMXgCzwFzaBjK9TG016NG0TH3s8hYr1zSj6TqMJkgIb4pu6Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T23:14:48.590054Z"},"content_sha256":"49afede00b3b675981da51f2e18e0bb1cdabf58064afeb4e1270b69bb895d703","schema_version":"1.0","event_id":"sha256:49afede00b3b675981da51f2e18e0bb1cdabf58064afeb4e1270b69bb895d703"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MM2AJ4PZ57HAOOYYGBDQ3IW5KA/bundle.json","state_url":"https://pith.science/pith/MM2AJ4PZ57HAOOYYGBDQ3IW5KA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MM2AJ4PZ57HAOOYYGBDQ3IW5KA/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":"2026-06-28T23:14:48Z","links":{"resolver":"https://pith.science/pith/MM2AJ4PZ57HAOOYYGBDQ3IW5KA","bundle":"https://pith.science/pith/MM2AJ4PZ57HAOOYYGBDQ3IW5KA/bundle.json","state":"https://pith.science/pith/MM2AJ4PZ57HAOOYYGBDQ3IW5KA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MM2AJ4PZ57HAOOYYGBDQ3IW5KA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:MM2AJ4PZ57HAOOYYGBDQ3IW5KA","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":"69b1a9fec14bb4e59eb3dbfc7281e8e6dfdd22939f200bcdb885e3eff4f22e69","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-04-29T13:39:40Z","title_canon_sha256":"7a32344ff375c355f8ae74d521e607bb64269d4efb303577522a4908b1c60003"},"schema_version":"1.0","source":{"id":"1604.08826","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.08826","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"arxiv_version","alias_value":"1604.08826v1","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.08826","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"pith_short_12","alias_value":"MM2AJ4PZ57HA","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_16","alias_value":"MM2AJ4PZ57HAOOYY","created_at":"2026-05-18T12:30:32Z"},{"alias_kind":"pith_short_8","alias_value":"MM2AJ4PZ","created_at":"2026-05-18T12:30:32Z"}],"graph_snapshots":[{"event_id":"sha256:49afede00b3b675981da51f2e18e0bb1cdabf58064afeb4e1270b69bb895d703","target":"graph","created_at":"2026-05-18T01:16:01Z","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":"Improved dense trajectories (iDT) have shown great performance in action recognition, and their combination with the two-stream approach has achieved state-of-the-art performance. It is, however, difficult for iDT to completely remove background trajectories from video with camera shaking. Trajectories in less discriminative regions should be given modest weights in order to create more discriminative local descriptors for action recognition. In addition, the two-stream approach, which learns appearance and motion information separately, cannot focus on motion in important regions when extract","authors_text":"Katsunori Ohnishi, Masatoshi Hidaka, Tatsuya Harada","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-04-29T13:39:40Z","title":"Improved Dense Trajectory with Cross Streams"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.08826","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":"sha256:58be8a27e3c63a39119e155fc4c13c08393b1e263e1652a41680d23b36b41e22","target":"record","created_at":"2026-05-18T01:16:01Z","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":"69b1a9fec14bb4e59eb3dbfc7281e8e6dfdd22939f200bcdb885e3eff4f22e69","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2016-04-29T13:39:40Z","title_canon_sha256":"7a32344ff375c355f8ae74d521e607bb64269d4efb303577522a4908b1c60003"},"schema_version":"1.0","source":{"id":"1604.08826","kind":"arxiv","version":1}},"canonical_sha256":"633404f1f9efce073b1830470da2dd5017e7a52dc4f388e4bc75db17d30c70d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"633404f1f9efce073b1830470da2dd5017e7a52dc4f388e4bc75db17d30c70d2","first_computed_at":"2026-05-18T01:16:01.608022Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:01.608022Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1AOs7KIJW/lQN9WPW+VTGmpYGFPlf8OY8WC+xZYNb2kSAzm0dG6ns8xFhWBqylKBdPw5fY6P4gHSpr2yPOm1Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:01.608541Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.08826","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:58be8a27e3c63a39119e155fc4c13c08393b1e263e1652a41680d23b36b41e22","sha256:49afede00b3b675981da51f2e18e0bb1cdabf58064afeb4e1270b69bb895d703"],"state_sha256":"85af1f8a86b88770760abb6b77727ca02f50924ce8730c7ba4da250ff0aacac3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UVVk8vIFysbsmyAlVqFzCwpDrrBcYpq798xTZM9VGxjIUJy1wMsvwXHTjE9j8QDo8LLgI2kZfBPcQHsB1dzKAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T23:14:48.592125Z","bundle_sha256":"acc66e159a43bbe72708c0cc1773c990c59f48c10c4a1877345079cee3891704"}}