{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9619642","patent":{"patent_number":"US-9619642","title":"Unicode-based image generation and testing","assignee":null,"inventors":[],"filing_date":"2015-08-28T00:00:00.000Z","publication_date":"2017-04-11T00:00:00.000Z","cpc_codes":["G06F","G06F","G06F","G06F"],"num_claims":20,"abstract":"Systems and methods for testing to tell computers and humans apart and generating said tests are described. To generate a test, a selection of a range of characters at least including the 8-bit ASCII character range is received. Each character in the selected range of characters is tested to determine if the character has a glyph in the selected font, if the character is a whitespace character, and if the character leaves a visible impression. From all the characters in the selected range of characters that pass the tests, a plurality of characters is selected for a challenge, and a larger set of characters (that includes the plurality of characters from the challenge) is selected for a response. An image is generated that includes the challenge and the response, and a solution threshold is calculated based on the location of the challenge characters within the generated response."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Unicode-based image generation and testing","description":"Systems and methods for testing to tell computers and humans apart and generating said tests are described. To generate a test, a selection of a range of characters at least including the 8-bit ASCII ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9619642","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-9619642","citation_suggestion":"Patentable. \"Unicode-based image generation and testing\" (US-9619642). https://patentable.app/patents/US-9619642","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9619642","json":"https://patentable.app/api/llm-context/US-9619642","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:40:06.447Z"}