{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9834139","patent":{"patent_number":"US-9834139","title":"Vehicle collision warning prevention method using optical flow analysis","assignee":null,"inventors":[],"filing_date":"2016-10-20T00:00:00.000Z","publication_date":"2017-12-05T00:00:00.000Z","cpc_codes":["G06F","G06V","G06T","G06T","G06T","G06T"],"num_claims":10,"abstract":"A vehicle collision warning prevention method includes the steps of: (a) extracting a forward video of a vehicle and video recognition information from a video recognition module mounted in a vehicle, and detecting a size change rate of a forward object included in the video recognition information at each frame of the forward video; (b) calculating an average OFCR of a predetermined frame section; (c) determining whether a value obtained by subtracting the average OFCR from a current OFCR is less than a predetermined threshold value; (d) determining that a brake operation signal is generated when it is determined that the value is less than the threshold value; (e) determining whether a collision warning signal is generated within a predetermined time after the step (d); and (f) preventing an output of the collision warning signal when the collision warning signal is generated at the step (e)."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Vehicle collision warning prevention method using optical flow analysis","description":"A vehicle collision warning prevention method includes the steps of: (a) extracting a forward video of a vehicle and video recognition information from a video recognition module mounted in a vehicle,","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9834139","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-9834139","citation_suggestion":"Patentable. \"Vehicle collision warning prevention method using optical flow analysis\" (US-9834139). https://patentable.app/patents/US-9834139","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9834139","json":"https://patentable.app/api/llm-context/US-9834139","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T12:33:05.267Z"}