{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9747521","patent":{"patent_number":"US-9747521","title":"Frequency domain interest point descriptor","assignee":null,"inventors":[],"filing_date":"2013-04-22T00:00:00.000Z","publication_date":"2017-08-29T00:00:00.000Z","cpc_codes":["G06V"],"num_claims":20,"abstract":"Systems and methods for image analysis and recognition are disclosed, in particular the methods for interest point description. An interest point and its surrounding area is broken into subareas, a frequency domain description of each area is created by applying discrete Fourier transform (DFT). Frequency domain features are than coded bitwise by comparing them to predefined thresholds. Subsequently, the present invention provides alternative or improved methods and data structures for interest point description that may reduce memory consumption and allow fast bitwise matching."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Frequency domain interest point descriptor","description":"Systems and methods for image analysis and recognition are disclosed, in particular the methods for interest point description. An interest point and its surrounding area is broken into subareas, a fr","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9747521","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-9747521","citation_suggestion":"Patentable. \"Frequency domain interest point descriptor\" (US-9747521). https://patentable.app/patents/US-9747521","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9747521","json":"https://patentable.app/api/llm-context/US-9747521","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:41:16.949Z"}