Method for rendering gray scale images with variable dot sizes
Patent 4680645 Issued on July 14, 1987. Estimated Expiration Date: 
August 25, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 25, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of and system for reproducing or transmitting half-tone images Method of processing medium tone picture Method and apparatus for generating a gray scale with a high speed thermal ink jet printer Patent #: 4503444 InventorsApplicationNo. 06/899358 filed on 08/25/1986US Classes:358/3.02, Print element property varied to represent gray level347/131, Dot density or dot size control (e.g., halftone)347/15, Creating plural tones358/3.03Error diffusion in gray level or halftone generationExaminersPrimary: Goldberg, E. A.Assistant: Foster, Patrick W. Attorney, Agent or FirmInternational ClassH04N 1/405 (20060101)AbstractThe capability of varying sizes of a dot in a printer is fully exploited to provide a gray scale image of superior quality. Errors in gray level are used to modulate the sizes of the dots in producing the image. | |
