{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9626042","patent":{"patent_number":"US-9626042","title":"Vision-based interactive projection system","assignee":null,"inventors":[],"filing_date":"2015-04-14T00:00:00.000Z","publication_date":"2017-04-18T00:00:00.000Z","cpc_codes":["G06F","G06F","G06V","G06F"],"num_claims":24,"abstract":"Techniques are provided to improve interaction between a user and a projection system. In some embodiments, an image of a user in front of a display screen is captured. An inference can then be made as to whether a user is touching a display screen based on an analysis of shadows and/or variation of brightness (i.e., intensities) across pixels in the image. For example, it may be inferred that the object is: (1) approaching the screen when a region surrounding a top of the object is characterized by a relatively small brightness variation; (2) hovering near the screen when the brightness variation is large and the region includes a dark extremum (caused by a shadow); and (3) touching the screen when the brightness variation is large and the region includes a light extremum."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Vision-based interactive projection system","description":"Techniques are provided to improve interaction between a user and a projection system. In some embodiments, an image of a user in front of a display screen is captured. An inference can then be made a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9626042","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-9626042","citation_suggestion":"Patentable. \"Vision-based interactive projection system\" (US-9626042). https://patentable.app/patents/US-9626042","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9626042","json":"https://patentable.app/api/llm-context/US-9626042","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:43:25.177Z"}