{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8495518","patent":{"patent_number":"US-8495518","title":"Contextual abnormality CAPTCHAs","assignee":null,"inventors":[],"filing_date":"2009-11-09T00:00:00.000Z","publication_date":"2013-07-23T00:00:00.000Z","cpc_codes":["G06F"],"num_claims":25,"abstract":"A method, computing device, and computer program product are provided for automatically generating contextual image tests implemented on a computer. An image is received by a computer. Sections of the image are altered to appear out of context or wrong to human users. The user must then identify the errors to pass the CAPTCHA."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Contextual abnormality CAPTCHAs","description":"A method, computing device, and computer program product are provided for automatically generating contextual image tests implemented on a computer. An image is received by a computer. Sections of the","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8495518","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-8495518","citation_suggestion":"Patentable. \"Contextual abnormality CAPTCHAs\" (US-8495518). https://patentable.app/patents/US-8495518","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8495518","json":"https://patentable.app/api/llm-context/US-8495518","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T04:21:19.491Z"}