Low resolution raster images
Patent 4437122 Issued on March 13, 1984. Estimated Expiration Date: 
September 12, 2001. 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.
September 12, 2001. 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 ReferencesGray scale interpolation technique Methods of a coarse-scan/fine-print character reproduction with compression Patent #: 4150400 InventorsAssigneeApplicationNo. 06/303742 filed on 09/12/1981US Classes:348/625, Transition or edge sharpeners345/419, Three-dimension358/3.07, Rescreening (e.g., converting spatial resolution)358/447, Signal enhancing382/267Minimize discontinuities in dot-matrix image data (i.e., connecting or merging the dots)ExaminersPrimary: Masinick, Michael A.Attorney, Agent or FirmInternational ClassesG06K 15/02 (20060101)G06K 15/02 (20060101) AbstractThe present invention enhances the resolution and quality of characters of a system receiving the information initially in the form of video display pixels and providing hard copy output. This is accomplished by storing at least three successive lines of video data in successive, parallel connected shift registers, applying the outputs of the shift registers to a decoder, and generating driving signals for the printer head. The decoder compares the pixels on the same line as well as in preceeding and succeeding lines that surround each specific input pixel to generate the printer head driving signals according to whether straight or curved line segments are to be formed. In effect, the printer increases the density of the information elements and simultaneously provides rounding off of character edges and smoothing of diagonals. | |
