{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:FF7DEJL6K3T3RFGE27WSE7RK7A","short_pith_number":"pith:FF7DEJL6","canonical_record":{"source":{"id":"2008.02500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-08-06T07:50:06Z","cross_cats_sorted":[],"title_canon_sha256":"4ff8fa9d7d5c329164cbdc837db09ae27fd0c46fe264a32816efe3666a3811e6","abstract_canon_sha256":"21a8340415fd2590efadf27b7cb3b6cdd93a82b8c464c9a6ed93dba164907420"},"schema_version":"1.0"},"canonical_sha256":"297e32257e56e7b894c4d7ed227e2af80e4056725aeae88a49655c7b309f4584","source":{"kind":"arxiv","id":"2008.02500","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.02500","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"arxiv_version","alias_value":"2008.02500v1","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.02500","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"pith_short_12","alias_value":"FF7DEJL6K3T3","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"pith_short_16","alias_value":"FF7DEJL6K3T3RFGE","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"pith_short_8","alias_value":"FF7DEJL6","created_at":"2026-07-05T02:05:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:FF7DEJL6K3T3RFGE27WSE7RK7A","target":"record","payload":{"canonical_record":{"source":{"id":"2008.02500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-08-06T07:50:06Z","cross_cats_sorted":[],"title_canon_sha256":"4ff8fa9d7d5c329164cbdc837db09ae27fd0c46fe264a32816efe3666a3811e6","abstract_canon_sha256":"21a8340415fd2590efadf27b7cb3b6cdd93a82b8c464c9a6ed93dba164907420"},"schema_version":"1.0"},"canonical_sha256":"297e32257e56e7b894c4d7ed227e2af80e4056725aeae88a49655c7b309f4584","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:05:42.300700Z","signature_b64":"K9y8wngAq77STBLjwroOx/y1qCzsVchCPqPiHkDMgDqk6WKE0tJVppYiwVN04QqU1qyK/LbwupGEIawG0qRcBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"297e32257e56e7b894c4d7ed227e2af80e4056725aeae88a49655c7b309f4584","last_reissued_at":"2026-07-05T02:05:42.300327Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:05:42.300327Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2008.02500","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":"2026-07-05T02:05:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O2simoMbwq3EiyL+ZdpzHtY9QLsA8pX0zGIOQPUy0ylipS9MP0yvpVd4GvABnrShcKUJ7k8BIpIwtG49WqfbAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T07:12:56.945747Z"},"content_sha256":"cc70758b5b9cadd3b71b8c13f9bf284947f6ee30f110eaede57df9c82f82cdfe","schema_version":"1.0","event_id":"sha256:cc70758b5b9cadd3b71b8c13f9bf284947f6ee30f110eaede57df9c82f82cdfe"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:FF7DEJL6K3T3RFGE27WSE7RK7A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gender and Ethnicity Classification based on Palmprint and Palmar Hand Images from Uncontrolled Environment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Adams Wai Kin Kong, Wojciech Michal Matkowski","submitted_at":"2020-08-06T07:50:06Z","abstract_excerpt":"Soft biometric attributes such as gender, ethnicity or age may provide useful information for biometrics and forensics applications. Researchers used, e.g., face, gait, iris, and hand, etc. to classify such attributes. Even though hand has been widely studied for biometric recognition, relatively less attention has been given to soft biometrics from hand. Previous studies of soft biometrics based on hand images focused on gender and well-controlled imaging environment. In this paper, the gender and ethnicity classification in uncontrolled environment are considered. Gender and ethnicity labels"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.02500","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/2008.02500/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":"2026-07-05T02:05:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nYmqGwkOBUqoAjHzFeFSsRyWvha3xM7pMMEHM8KVYWxvjyi3ZDEz7aNZFbOSuxgceh+frt7isbqpHGPNMqZoDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T07:12:56.946349Z"},"content_sha256":"f59a57cc8a46d6557c17f3d4caf43a1cb54df118db59a24eb1357dc8bc3a8b80","schema_version":"1.0","event_id":"sha256:f59a57cc8a46d6557c17f3d4caf43a1cb54df118db59a24eb1357dc8bc3a8b80"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FF7DEJL6K3T3RFGE27WSE7RK7A/bundle.json","state_url":"https://pith.science/pith/FF7DEJL6K3T3RFGE27WSE7RK7A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FF7DEJL6K3T3RFGE27WSE7RK7A/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":"2026-07-07T07:12:56Z","links":{"resolver":"https://pith.science/pith/FF7DEJL6K3T3RFGE27WSE7RK7A","bundle":"https://pith.science/pith/FF7DEJL6K3T3RFGE27WSE7RK7A/bundle.json","state":"https://pith.science/pith/FF7DEJL6K3T3RFGE27WSE7RK7A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FF7DEJL6K3T3RFGE27WSE7RK7A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:FF7DEJL6K3T3RFGE27WSE7RK7A","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":"21a8340415fd2590efadf27b7cb3b6cdd93a82b8c464c9a6ed93dba164907420","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-08-06T07:50:06Z","title_canon_sha256":"4ff8fa9d7d5c329164cbdc837db09ae27fd0c46fe264a32816efe3666a3811e6"},"schema_version":"1.0","source":{"id":"2008.02500","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.02500","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"arxiv_version","alias_value":"2008.02500v1","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.02500","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"pith_short_12","alias_value":"FF7DEJL6K3T3","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"pith_short_16","alias_value":"FF7DEJL6K3T3RFGE","created_at":"2026-07-05T02:05:42Z"},{"alias_kind":"pith_short_8","alias_value":"FF7DEJL6","created_at":"2026-07-05T02:05:42Z"}],"graph_snapshots":[{"event_id":"sha256:f59a57cc8a46d6557c17f3d4caf43a1cb54df118db59a24eb1357dc8bc3a8b80","target":"graph","created_at":"2026-07-05T02:05:42Z","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/2008.02500/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Soft biometric attributes such as gender, ethnicity or age may provide useful information for biometrics and forensics applications. Researchers used, e.g., face, gait, iris, and hand, etc. to classify such attributes. Even though hand has been widely studied for biometric recognition, relatively less attention has been given to soft biometrics from hand. Previous studies of soft biometrics based on hand images focused on gender and well-controlled imaging environment. In this paper, the gender and ethnicity classification in uncontrolled environment are considered. Gender and ethnicity labels","authors_text":"Adams Wai Kin Kong, Wojciech Michal Matkowski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-08-06T07:50:06Z","title":"Gender and Ethnicity Classification based on Palmprint and Palmar Hand Images from Uncontrolled Environment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.02500","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:cc70758b5b9cadd3b71b8c13f9bf284947f6ee30f110eaede57df9c82f82cdfe","target":"record","created_at":"2026-07-05T02:05:42Z","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":"21a8340415fd2590efadf27b7cb3b6cdd93a82b8c464c9a6ed93dba164907420","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2020-08-06T07:50:06Z","title_canon_sha256":"4ff8fa9d7d5c329164cbdc837db09ae27fd0c46fe264a32816efe3666a3811e6"},"schema_version":"1.0","source":{"id":"2008.02500","kind":"arxiv","version":1}},"canonical_sha256":"297e32257e56e7b894c4d7ed227e2af80e4056725aeae88a49655c7b309f4584","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"297e32257e56e7b894c4d7ed227e2af80e4056725aeae88a49655c7b309f4584","first_computed_at":"2026-07-05T02:05:42.300327Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:05:42.300327Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"K9y8wngAq77STBLjwroOx/y1qCzsVchCPqPiHkDMgDqk6WKE0tJVppYiwVN04QqU1qyK/LbwupGEIawG0qRcBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:05:42.300700Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.02500","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cc70758b5b9cadd3b71b8c13f9bf284947f6ee30f110eaede57df9c82f82cdfe","sha256:f59a57cc8a46d6557c17f3d4caf43a1cb54df118db59a24eb1357dc8bc3a8b80"],"state_sha256":"3931b653f58b8f3e9d4468fb5f6ac73523963bb1dc34d5f6e290f059beab98e8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ci6umvbWjYnizm+VZXh/MsWeV/i1r4VOqABNKZBx/C+HoQ08aOpplM6F0f1EX3CfoSvU3n9UXUbRCGotRhuyBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T07:12:56.949335Z","bundle_sha256":"0c7f5b50312fa2940b3e63ab33e93b8490b15fe0927f44cbaffd81f3201e4c44"}}