{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8538044","patent":{"patent_number":"US-8538044","title":"Line-of-sight direction determination device and line-of-sight direction determination method","assignee":null,"inventors":[],"filing_date":"2009-09-25T00:00:00.000Z","publication_date":"2013-09-17T00:00:00.000Z","cpc_codes":["A61B","A61B","G06T","G06T","G06V","A61B","G06T"],"num_claims":7,"abstract":"Provided are a line-of-sight direction determination device and a line-of-sight direction determination method capable of highly precisely and accurately determining a line-of-sight direction from immediately after start of measurement without indication of an object to be carefully observed and adjustment work done in advance. The line-of-sight direction determination device (100) comprises: a line-symmetric position determination unit (150) for determining that the corneal reflection image of a left eye or a right eye is located at a line-symmetric position with respect to the center line of the pupils of the right and left eyes; and a line-of-sight direction determination unit (170) for determining, from the line-symmetric position determination result, a line-of-sight direction at a specific position including the installation position of an imaging unit (111) or an irradiation unit (112) at the substantially same position as the imaging unit (111). The line-of-sight direction determination device (100) determines that the corneal reflection image is line symmetric and, from this line symmetry property, determines a specific line-of-sight direction."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Line-of-sight direction determination device and line-of-sight direction determination method","description":"Provided are a line-of-sight direction determination device and a line-of-sight direction determination method capable of highly precisely and accurately determining a line-of-sight direction from imm","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8538044","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-8538044","citation_suggestion":"Patentable. \"Line-of-sight direction determination device and line-of-sight direction determination method\" (US-8538044). https://patentable.app/patents/US-8538044","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8538044","json":"https://patentable.app/api/llm-context/US-8538044","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T17:09:16.435Z"}