{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8471949","patent":{"patent_number":"US-8471949","title":"Focus-adjustment signal generating apparatus and method, and imaging apparatus and method, with manual focus adjustments","assignee":null,"inventors":[],"filing_date":"2011-05-31T00:00:00.000Z","publication_date":"2013-06-25T00:00:00.000Z","cpc_codes":["H04N"],"num_claims":6,"abstract":"A focus-adjustment signal generating apparatus includes a filter to extract a high-frequency component at a specific frequency or higher from a luminance signal of an input video signal, a comparator to compare an absolute value of the high-frequency component with a specific reference value, to output a first detection signal when the absolute value is equal to or larger than the reference value whereas a second detection signal when the absolute value is smaller than the reference value, an extender to extend an output period of the first detection signal according to a period indicated by a period-length setting signal, to output an extended first detection signal, and a selector to select a first chrominance difference signal indicating a specific color in response to the extended first detection signal whereas a second chrominance difference signal indicating an achromatic color in response to the second detection signal, the first or the second chrominance difference signal being output as a focus-adjustment signal."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Focus-adjustment signal generating apparatus and method, and imaging apparatus and method, with manual focus adjustments","description":"A focus-adjustment signal generating apparatus includes a filter to extract a high-frequency component at a specific frequency or higher from a luminance signal of an input video signal, a comparator ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8471949","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-8471949","citation_suggestion":"Patentable. \"Focus-adjustment signal generating apparatus and method, and imaging apparatus and method, with manual focus adjustments\" (US-8471949). https://patentable.app/patents/US-8471949","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8471949","json":"https://patentable.app/api/llm-context/US-8471949","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T14:09:33.242Z"}