{"schema_version":"4ort.packet/1","entity":{"entity_id":"perceptual-hashing","kg_uuid":"9aa11903-4440-4d12-b497-e5d9c3db7b3d","wikidata_id":"Q19598510","name":"perceptual hashing","description":"calculation of hashes for images that have similar values for similar inputs use of an algorithm that attempts to fingerprint multimedia for identification and comparison. Perceptual hashes of two similar multimedia should be similar.","type":"Thing","url":"https://4ort.xyz/entity/perceptual-hashing"},"status":"complete","as_of":{"copy_written_at":"2026-10-30T17:19:32Z","last_source_edit_seen":null,"stale_possible":true,"claims_refreshed_at":null,"source_revision":null},"facts":[{"field":"P279","label":"subclass of","value":"hashing","value_id":"Q11079271","value_raw":"Q11079271","rank":"normal","current":null,"qualifiers":[],"layer":"source","citation":{"source":"wikidata","source_name":"Wikidata","source_record":"https://www.wikidata.org/wiki/Q19598510#P279","source_edition":null,"edition_basis":"unknown","licence":"CC0 1.0 Universal","licence_url":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":null,"references":[]},"trust":{"band":"unscored","basis":"wikidata-reference-support/2","calibrated":false}},{"field":"P366","label":"has use","value":"copyright infringement via online photo","value_id":"Q61723737","value_raw":"Q61723737","rank":"normal","current":null,"qualifiers":[],"layer":"source","citation":{"source":"wikidata","source_name":"Wikidata","source_record":"https://www.wikidata.org/wiki/Q19598510#P366","source_edition":null,"edition_basis":"unknown","licence":"CC0 1.0 Universal","licence_url":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":null,"references":[]},"trust":{"band":"unscored","basis":"wikidata-reference-support/2","calibrated":false}},{"field":"P366","label":"has use","value":"video copy detection","value_id":"Q3818988","value_raw":"Q3818988","rank":"normal","current":null,"qualifiers":[],"layer":"source","citation":{"source":"wikidata","source_name":"Wikidata","source_record":"https://www.wikidata.org/wiki/Q19598510#P366","source_edition":null,"edition_basis":"unknown","licence":"CC0 1.0 Universal","licence_url":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":null,"references":[]},"trust":{"band":"unscored","basis":"wikidata-reference-support/2","calibrated":false}},{"field":"P2283","label":"uses","value":"Hamming distance","value_id":"Q272172","value_raw":"Q272172","rank":"normal","current":null,"qualifiers":[],"layer":"source","citation":{"source":"wikidata","source_name":"Wikidata","source_record":"https://www.wikidata.org/wiki/Q19598510#P2283","source_edition":null,"edition_basis":"unknown","licence":"CC0 1.0 Universal","licence_url":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":null,"references":[]},"trust":{"band":"unscored","basis":"wikidata-reference-support/2","calibrated":false}},{"field":"P2283","label":"uses","value":"image hash function","value_id":"Q111847169","value_raw":"Q111847169","rank":"normal","current":null,"qualifiers":[],"layer":"source","citation":{"source":"wikidata","source_name":"Wikidata","source_record":"https://www.wikidata.org/wiki/Q19598510#P2283","source_edition":null,"edition_basis":"unknown","licence":"CC0 1.0 Universal","licence_url":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":null,"references":[]},"trust":{"band":"unscored","basis":"wikidata-reference-support/2","calibrated":false}},{"field":"P2283","label":"uses","value":"fingerprint","value_id":"Q3745713","value_raw":"Q3745713","rank":"normal","current":null,"qualifiers":[{"field":"P1932","label":"object named as","value":"fingerprinting algorithm"}],"layer":"source","citation":{"source":"wikidata","source_name":"Wikidata","source_record":"https://www.wikidata.org/wiki/Q19598510#P2283","source_edition":null,"edition_basis":"unknown","licence":"CC0 1.0 Universal","licence_url":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":null,"references":[]},"trust":{"band":"unscored","basis":"wikidata-reference-support/2","calibrated":false}},{"field":"P6366","label":"Microsoft Academic ID (discontinued)","value":"2777442007","value_id":null,"value_raw":"2777442007","rank":"normal","current":null,"qualifiers":[],"layer":"source","citation":{"source":"wikidata","source_name":"Wikidata","source_record":"https://www.wikidata.org/wiki/Q19598510#P6366","source_edition":null,"edition_basis":"unknown","licence":"CC0 1.0 Universal","licence_url":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":null,"references":[]},"trust":{"band":"unscored","basis":"wikidata-reference-support/2","calibrated":false}},{"field":"P9100","label":"GitHub topic","value":"perceptual-hashing","value_id":null,"value_raw":"perceptual-hashing","rank":"normal","current":null,"qualifiers":[],"layer":"source","citation":{"source":"wikidata","source_name":"Wikidata","source_record":"https://www.wikidata.org/wiki/Q19598510#P9100","source_edition":null,"edition_basis":"unknown","licence":"CC0 1.0 Universal","licence_url":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":null,"references":[]},"trust":{"band":"unscored","basis":"wikidata-reference-support/2","calibrated":false}}],"unknowns":[],"omitted":{"facts":0,"reason":null},"licences":[{"source":"wikidata","source_name":"Wikidata","licence":"CC0 1.0 Universal","licence_url":"https://creativecommons.org/publicdomain/zero/1.0/","attribution":null,"fields":["P279","P366","P2283","P6366","P9100"]}],"routes":{"entity_page":"https://4ort.xyz/entity/perceptual-hashing","packet_api":"https://4ort.xyz/api/v1/entities/perceptual-hashing/packet","facts_jsonld":"https://4ort.xyz/entity/perceptual-hashing/facts.json","changes_api":"https://4ort.xyz/api/v1/knowledge/get_entity_changes?entity=perceptual-hashing","attention_api":"https://4ort.xyz/api/v1/knowledge/get_attention?entity=perceptual-hashing","wikidata":"https://www.wikidata.org/wiki/Q19598510","official_website":null},"trust_rules":{"wikidata-reference-support/2":"From the references in our copy of the statement: high = it cites a source (stated in P248, or a reference URL that is not Wikipedia); medium = only 'imported from Wikimedia project' or a Wikipedia URL; unscored = our copy holds no reference (older copies dropped references, so this is not evidence that Wikidata has none). Wikidata may hold more references than our copy shows. Reference support, not a probability."},"notes":["Our copy of this item's statements has not been checked against Wikidata since tracking began (2026-10-25); a newer value may exist."]}