{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9589187","patent":{"patent_number":"US-9589187","title":"Method for locating center of pupil and electronic apparatus","assignee":null,"inventors":[],"filing_date":"2016-03-01T00:00:00.000Z","publication_date":"2017-03-07T00:00:00.000Z","cpc_codes":["G06V"],"num_claims":10,"abstract":"A method and an electronic apparatus for locating the center of a pupil are provided. The method includes: obtaining a glint-free image including a pupil; generating a gradient magnitude graph and a gradient orientation graph based on the glint-free image; sifting a plurality of first pixels from the gradient magnitude graph, and finding a plurality of second pixels corresponding to the plurality of first pixels in the gradient orientation graph; taking a negative gradient orientation to each of the second pixels to generate a gradient emission graph including a plurality of emissions; defining a center of the pupil in the glint-free image based on the plurality of emissions in the gradient emission graph."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method for locating center of pupil and electronic apparatus","description":"A method and an electronic apparatus for locating the center of a pupil are provided. The method includes: obtaining a glint-free image including a pupil; generating a gradient magnitude graph and a g","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9589187","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-9589187","citation_suggestion":"Patentable. \"Method for locating center of pupil and electronic apparatus\" (US-9589187). https://patentable.app/patents/US-9589187","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9589187","json":"https://patentable.app/api/llm-context/US-9589187","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T12:32:50.450Z"}