{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9639921","patent":{"patent_number":"US-9639921","title":"Apparatus and method of extracting keypoint and image matching system for analyzing distribution state of contents using the same","assignee":null,"inventors":[],"filing_date":"2015-05-26T00:00:00.000Z","publication_date":"2017-05-02T00:00:00.000Z","cpc_codes":["G06V","G06T","G06T","G06V","G06V","G06T","G06T"],"num_claims":29,"abstract":"A device and method of extracting a keypoint, and an image matching system for analyzing an online distribution situation of contents using the same are provided. The device for extracting a keypoint which is robust to image change, includes: a keypoint extraction unit configured to extract a corner region in an image as a keypoint candidate region, and extract the keypoint from the keypoint candidate region; and a keypoint postprocessing unit configured to generate a keypoint descriptor with respect to the extracted keypoint."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Apparatus and method of extracting keypoint and image matching system for analyzing distribution state of contents using the same","description":"A device and method of extracting a keypoint, and an image matching system for analyzing an online distribution situation of contents using the same are provided. The device for extracting a keypoint ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9639921","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-9639921","citation_suggestion":"Patentable. \"Apparatus and method of extracting keypoint and image matching system for analyzing distribution state of contents using the same\" (US-9639921). https://patentable.app/patents/US-9639921","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9639921","json":"https://patentable.app/api/llm-context/US-9639921","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T12:34:49.575Z"}