{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9852498","patent":{"patent_number":"US-9852498","title":"Removing artifacts from document images","assignee":null,"inventors":[],"filing_date":"2016-04-26T00:00:00.000Z","publication_date":"2017-12-26T00:00:00.000Z","cpc_codes":["G06V","G06T","G06T","G06V","G06V","G06V"],"num_claims":20,"abstract":"Techniques for removing artifacts, such as shadows, from document images are described. A shadow map is generated for a digital image by first determining local background colors using clusters of local pixel intensities. Then, a global reference background color is selected from all pixel intensities of the digital image. Next, a per-pixel scaling factor is determined that maps the local background colors to the global reference background color, which applies localized adjustment to the digital image to remove local shadow."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Removing artifacts from document images","description":"Techniques for removing artifacts, such as shadows, from document images are described. A shadow map is generated for a digital image by first determining local background colors using clusters of loc","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9852498","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-9852498","citation_suggestion":"Patentable. \"Removing artifacts from document images\" (US-9852498). https://patentable.app/patents/US-9852498","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9852498","json":"https://patentable.app/api/llm-context/US-9852498","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:37:30.789Z"}