{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9816977","patent":{"patent_number":"US-9816977","title":"Method and arrangement for detecting free fibre ends in paper","assignee":null,"inventors":[],"filing_date":"2014-05-09T00:00:00.000Z","publication_date":"2017-11-14T00:00:00.000Z","cpc_codes":["G01N","G01N","G01N","G01N","G06T","G06T","G01N","G01N","G01N","G06T"],"num_claims":18,"abstract":"The invention relates to a method and arrangement for detecting free fiber ends in a paper surface. The method comprises illuminating a target sample (6) surface, which comprises free fiber ends, from at least two directions one at the time, with at least one light source (1). Original reflectance images are obtained for the target sample (6) surface with an imaging device (4), and a surface normal is estimated for each image pixel of the original reflectance image. Thus it is possible to reconstruct a reconstructed reflectance image from the estimated surface normals, and to compare the reconstructed reflectance image and the corresponding original reflectance image and to construct a difference image, where the differences represent shadow objects of the free fiber ends in a paper surface."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and arrangement for detecting free fibre ends in paper","description":"The invention relates to a method and arrangement for detecting free fiber ends in a paper surface. The method comprises illuminating a target sample (6) surface, which comprises free fiber ends, from","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9816977","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-9816977","citation_suggestion":"Patentable. \"Method and arrangement for detecting free fibre ends in paper\" (US-9816977). https://patentable.app/patents/US-9816977","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9816977","json":"https://patentable.app/api/llm-context/US-9816977","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T15:42:51.063Z"}