{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9639949","patent":{"patent_number":"US-9639949","title":"Edge orientation for second derivative edge detection methods","assignee":null,"inventors":[],"filing_date":"2010-03-15T00:00:00.000Z","publication_date":"2017-05-02T00:00:00.000Z","cpc_codes":["G06T"],"num_claims":20,"abstract":"An improved algorithm for edge detection is provided that utilizes the second order derivative of the intensity distribution function of an image to provide edge orientation information for the detected edges. An exemplary embodiment of the improved algorithm includes determining the second order derivative of the intensity distribution function, identifying zero-crossings in the horizontal and vertical directions, assigning angle information to the identified zero-crossings in the horizontal and vertical directions; and identifying an edge orientation based the assigned angle information for the horizontal and vertical zero-crossing of the edge and adjacent edges."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Edge orientation for second derivative edge detection methods","description":"An improved algorithm for edge detection is provided that utilizes the second order derivative of the intensity distribution function of an image to provide edge orientation information for the detect","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9639949","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-9639949","citation_suggestion":"Patentable. \"Edge orientation for second derivative edge detection methods\" (US-9639949). https://patentable.app/patents/US-9639949","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9639949","json":"https://patentable.app/api/llm-context/US-9639949","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:41:17.512Z"}