Image information recorder having a resolution density transformation device
Patent 5123082 Issued on June 16, 1992. Estimated Expiration Date: 
January 3, 2011. 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.
January 3, 2011. 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 ReferencesElectronic rescreen technique for halftone pictures Device for the dynamic adjustment of a black/white discrimination threshold for the processing of images containing grey values Image scanner apparatus with scanning function Information signal transmission system Radiation scanner uniformity system Fast bitonal to gray scale image scaling Patent #: 4829587 InventorAssigneeApplicationNo. 637204 filed on 01/03/1991US Classes:358/1.2, Size, resolution, or scale control382/299Raising or lowering the image resolution (e.g., subpixel accuracy)ExaminersPrimary: Harkcom, Gary V.Assistant: Zimmerman, Mark Attorney, Agent or FirmInternational ClassG06F 015/20Foreign Application Priority Data1988-01-19 JPAbstractAn image information recorder, including a printer capable of continuous printing in the direction of scanning lines, for reproducing binary input data of an image of a resolution density of 400 dpi (dots per inch) in a form of a visual image of the resolution density of 600 dpi. The input data of 400 dpi is transformed into multi-value image data of 600 dpi in accordance with two-dimensional filtering, which is converted into an analog image signal. The analog image signal is smoothed by a low pass filter, and then the smoothed analog image signal is binarized by a constant threshold signal, whereby an output binary image data of 600 dpi is produced. | |
