{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9615020","patent":{"patent_number":"US-9615020","title":"Auto focus method and apparatus using the same","assignee":null,"inventors":[],"filing_date":"2016-03-22T00:00:00.000Z","publication_date":"2017-04-04T00:00:00.000Z","cpc_codes":["H04N","H04N"],"num_claims":20,"abstract":"An auto focus method includes (a) obtaining a selected exposure value and an un-normalized contrast value; (b) executing a normalized contrast value obtaining procedure at each of the stepping positions; and (c) executing a focal point searching procedure according to the normalized contrast values. Accordingly, the normalization procedure is applied to eliminate the effect of the exposure value on the contrast value, so that the focal point of the image can be obtained correctly. In addition, an image capturing apparatus using the focus method is provided."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Auto focus method and apparatus using the same","description":"An auto focus method includes (a) obtaining a selected exposure value and an un-normalized contrast value; (b) executing a normalized contrast value obtaining procedure at each of the stepping positio","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9615020","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-9615020","citation_suggestion":"Patentable. \"Auto focus method and apparatus using the same\" (US-9615020). https://patentable.app/patents/US-9615020","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9615020","json":"https://patentable.app/api/llm-context/US-9615020","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:40:14.396Z"}