{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9628660","patent":{"patent_number":"US-9628660","title":"Method and device for recognizing document image, and photographing method using the same","assignee":null,"inventors":[],"filing_date":"2013-11-13T00:00:00.000Z","publication_date":"2017-04-18T00:00:00.000Z","cpc_codes":["H04N","G06V","G06V","G06V","G06V"],"num_claims":19,"abstract":"A method and a device for recognizing a document image, and a photographing method using the same are provided. The method includes extracting, from an input image, a primary feature, including information on feature points, by determining each pixel that is not similar to comparison pixels to be a feature point through a comparison of the pixel to the comparison pixels spaced a predetermined distance apart from the pixel, and classifying the input image as a document image or a non-document image by applying preset primary classification criteria, including criteria for the total number of the feature points to the primary feature."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and device for recognizing document image, and photographing method using the same","description":"A method and a device for recognizing a document image, and a photographing method using the same are provided. The method includes extracting, from an input image, a primary feature, including inform","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9628660","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-9628660","citation_suggestion":"Patentable. \"Method and device for recognizing document image, and photographing method using the same\" (US-9628660). https://patentable.app/patents/US-9628660","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9628660","json":"https://patentable.app/api/llm-context/US-9628660","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:29:28.424Z"}