Halftone image processing method
November 26, 2004. 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 for halftone reproduction of continuous tone images Color raster scanner for recording cartographic data Screened image reproduction Scanning device with area-to-linear mapping and related electronic scanner/printer apparatus Color plotter interface and control circuit Screen systems for multicolor printing Method and apparatus for forming high resolution halftone images Transform processing method for reducing noise in an image Picture scanning and recording method Patent #: 4553172 InventorsAssigneeApplicationNo. 06/674870 filed on 11/26/1984US Classes:358/3.2, Screen property or geometry (e.g., shape, period, symmetry, aspect ratio)358/3.26Distortion control in image reproduction (e.g., removing, reducing or preventing image artifacts)ExaminersPrimary: Coles, Sr., Edward L.Attorney, Agent or FirmInternational ClassH04N 1/405 (20060101)Foreign Application Priority Data1983-11-24 JPAbstractA halftone image processing method for providing image information in a bit distribution by specifying a matrix pattern in response to tone data which is indicative of a recording density. Several matrix pattern groups are prepared each comprising matrix patterns which are larger in number than dots which define a dot matrix. The matrix pattern groups are provided with density characteristics different from each other. One of the groups is specified in conformity to a required density characteristic, while one of the matrix patterns in the specified group is specified in response to tone data. Any one of various modes of tone representation is selectable and, in addition, numerous tones may be rendered to enhance smooth representation of tones. | |
