{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8498447","patent":{"patent_number":"US-8498447","title":"Method of evaluating the horizontal speed of a drone, in particular a drone capable of performing hovering flight under autopilot","assignee":null,"inventors":[],"filing_date":"2011-06-08T00:00:00.000Z","publication_date":"2013-07-30T00:00:00.000Z","cpc_codes":["G06T","G01S","G01S","G06T","G06T"],"num_claims":10,"abstract":"The method operates by estimating the differential movement of the scene picked up by a vertically-oriented camera. Estimation includes periodically and continuously updating a multiresolution representation of the pyramid of images type modeling a given picked-up image of the scene at different, successively-decreasing resolutions. For each new picked-up image, an iterative algorithm of the optical flow type is applied to said representation. The method also provides responding to the data produced by the optical-flow algorithm to obtain at least one texturing parameter representative of the level of microcontrasts in the picked-up scene and obtaining an approximation of the speed, to which parameters a battery of predetermined criteria are subsequently applied. If the battery of criteria is satisfied, then the system switches from the optical-flow algorithm to an algorithm of the corner detector type."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method of evaluating the horizontal speed of a drone, in particular a drone capable of performing hovering flight under autopilot","description":"The method operates by estimating the differential movement of the scene picked up by a vertically-oriented camera. Estimation includes periodically and continuously updating a multiresolution represe","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8498447","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-8498447","citation_suggestion":"Patentable. \"Method of evaluating the horizontal speed of a drone, in particular a drone capable of performing hovering flight under autopilot\" (US-8498447). https://patentable.app/patents/US-8498447","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8498447","json":"https://patentable.app/api/llm-context/US-8498447","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T23:03:57.046Z"}