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| Number | Title | Issue Date |
| 8018634 | Image printing method and system for improving image quality in dot matrix printer Ink coalescence in inkjet printing is reduced by printing mutually interstitial images using an arrangement of multiple curing stations in combination with multiple printing heads. ... | 09/13/2011 |
| 7440141 | Method for generating a dither mask A method for generating a dither mask is disclosed using a local stochastic technique for use for the halftoning of grey scale images by a pixel by pixel comparison of the images against the dither mask. The dither mask is generated by producing a sequence of dot pr... | 10/21/2008 |
| 7385731 | Method and system for processing a multi-colour image A method and system are provided for processing digital multi-colour images for the reproduction thereof on a colour printing and/or copying system. Particularly, the printing and/or copying system is capable of complementary forming registered composite multi-colou... | 06/10/2008 |
| 7375866 | Image processing system and method for screening A system and method for printing an image on a document by generating RGB data from a scanned image, converting the RGB data to CMYK data and identifying one of a first and a second type of screening. The type of screening is identified for a first one of the CMYK d... | 05/20/2008 |
| 7369270 | Print engine/controller and printhead interface chip incorporating the engine/controller A print engine/controller suited to use with a drop on demand print head. The print engine/controller works with compressed page data having both JPEG contone image layers and a bi-level image plane compressed using a Group 4 facsimile protocol. It receives compress... | 05/06/2008 |
| 7345791 | Image processing device and image processing method An image processing device for processing an input image so as to reproduce a halftone, includes: a matrix setting section for setting a threshold matrix having a plurality of elements arranged in M columns×N rows, at least two threshold values being stored in each... | 03/18/2008 |
| 7342684 | Image processing method and apparatus It is an object of this invention to prevent a false edge phenomenon in quantization processing for a multilevel image. In order to achieve this object, according to the invention, (1) a reference threshold (Cthreshold) to be used for error diffusion for a cyan (C) ... | 03/11/2008 |
| 7330191 | System for secure text display Techniques for securely displaying text on a display panel involve destroying spatial and temporal correlations in an otherwise uniform visual field. The techniques render the displayed text secure with respect to attempts to copy the text using a video capture devi... | 02/12/2008 |
| 7327491 | Image processing apparatus, image processing method, computer program and computer-readable storage medium For M (magenta) and C (cyan), in a case of generating, e.g., ternary data of C0 to C2 and M0 to M2 respectively by using a look-up table on the basis of an error diffusion method, in a highlight portion of input M and C data (to which err... | 02/05/2008 |
| 7324244 | Image forming apparatus and image forming method An image forming apparatus includes a first-image-reading-portion composed of a plurality of line sensors used to read a color image, a second-image-reading-portion composed of at least one line sensor used to read a monochrome image, a first-image-processing-portio... | 01/29/2008 |
| 7321450 | Image processing method, image processing apparatus, and recording medium According to an image processing method for performing color processing in accordance with a plurality of image objects, image data representing the plurality of image objects is input. The relationship between the plurality of image objects is analyzed. The plurali... | 01/22/2008 |
| 7321447 | System and method for processing a multi-colour image A system and method are provided for processing digital multi-colour images for the reproduction thereof on a colour printing and/or copying system. Image dots of marking particles of the respective colours associated with the respective colour separation images are... | 01/22/2008 |
| 7301676 | Printing method and apparatus, and binary-form dither matrix pattern A method and apparatus for printing a multivalue image in a binary-form output pattern. The printing apparatus employs a binary-form dither matrix pattern which is composed of a greater number of pixels, so that moiré patterns and other artifacts are minimized in p... | 11/27/2007 |
| 7262885 | Stochastic halftone screening method A method for halftoning a gray scale image to generate a halftoned image uses a stochastic screen is designed to provide visually pleasing, blue noise dot profiles when thresholded at any gray level and wherein substantially all the threshold values corresponding to... | 08/28/2007 |
| 7253925 | System and method for performing halftone processing of color and monochrome data A system and method for creating gamma correction data for a hardcopy device includes generating a data pattern, the data pattern including data representing color pixels and monochrome pixels, dithering the color pixels of the data pattern, and error diffusing the ... | 08/07/2007 |
| 7253923 | Image processing apparatus CPU 150 performs a matrix operation on image data GD, and then increases the effective digit place number of the color values of the image data GD to increase the tone number of the image data GD from 8-bit tone to 18-bit tone. CPU 150 performs a gamma... | 08/07/2007 |
| 7233415 | Printing method and apparatus, and binary-form dither matrix pattern A method and apparatus for printing a multivalue image in a binary-form output pattern. The printing apparatus employs a binary-form dither matrix pattern which is composed of a greater number of pixels, so that moiré patterns and other artifacts are minimized in p... | 06/19/2007 |
| 7217999 | Multilayer interconnection board, semiconductor device having the same, and method of forming the same as well as method of mounting the semiconductor chip on the interconnection board In accordance with the present invention, during formation of the interconnection board, the interconnection board remains securely fixed to a high rigidity plate being higher in rigidity than the interconnection board for suppressing the interconnection board from ... | 05/15/2007 |
| 7193533 | Operating element with settable selectivity An operating element with a settable operating characteristic for generating numerical control values A converts position signals P corresponding to the position of a linear sensor element into control values A using an assignment characteristic curve. Different ass... | 03/20/2007 |
| 7164499 | Block quantization method for color halftoning A method and apparatus for performing color halftoning using block quantization is disclosed. In one embodiment, the method comprises dividing an input image into a plurality of blocks, clustering pixels in each of the plurality of blocks into a plurality of color g... | 01/16/2007 |
| 7158263 | Dynamic generation of linearized halftone matrix There is disclosed a method of dynamic generation of a linearized halftone matrix from a high bit resolution halftone matrix, for use in a printer device, for example a domestic or office printer device or a commercial high resolution printer device. A high bit reso... | 01/02/2007 |
| 7145702 | Image processing method An image data of M-gradations in a pixel is converted into multivalued image data of N-gradations (M>N>2) in a pixel. A remarked pixel converted into the multivalued data is determined whether to be a predetermined gradation TJ (N>TJ>2) in which a tone jump occurs. ... | 12/05/2006 |
| 7130081 | Image processing method, image processing apparatus and recording medium The present invention relates to an image processing method, an image processing apparatus and a recording medium that convert a grey scale image into an area gradation image. The present invention intends to provide an image processing method, an image processing a... | 10/31/2006 |
| 7123383 | Dither pattern for image forming device An image forming device according to the invention produces a continuous gray-scale image by using a dither matrix structured by orderly tiling a plurality of dither patterns. In each dither pattern, a plurality of gray level areas are arranged in the laser scanning... | 10/17/2006 |
| 7102791 | Mask producing method, image outputting device and computer readable recording medium A mask is produced for converting multi-level image data into a halftone image through comparison with a threshold for each pixel. For this purpose, a dot pattern is determined on each of predetermined gray scale levels, and, the mask is created by the dot patterns ... | 09/05/2006 |
| 7092119 | Method, system, and program for managing calibration files in a printing system Disclosed is a method, system, and program for managing calibration files in a printing system. Patches are printed using a screening algorithm and incorporating at least one output appearance factor. A calibration file is generated from measured color values of the... | 08/15/2006 |
| 7092123 | Evaluation of dot interference moiré A halftone dot image HI composed of halftone dots is produced by halftone dot meshing of an object image OI. A smoothed object image SOI and a smoothed halftone dot image SHI are then produced by smoothing the object image and the halftone dot image. An interference... | 08/15/2006 |
| 7092125 | Method of printing using PC and printer It is necessary that paper be moved past the printhead at a constant velocity to obtain artifact-free printing. Therefore the printhead requires a constant stream of data during printing. Whilst it is possible to rasterize the page using a page description language ... | 08/15/2006 |
| 7079290 | Halftoning method and system providing increased number of densities per basic halftone cell for constant input Apparatus and method for flexible digital halftoning are provided in which novel pattern choices are allowed by not restricting the basic halftone patterns to grow sequentially. Rather, positions in a threshold array allow multiple transitions between on (i.e., prin... | 07/18/2006 |
| 7072076 | Printing method using PC rendering It is necessary that paper be moved past the printhead at a constant velocity to obtain artifact—free printing. Therefore the printhead requires a constant stream of data during printing. Whilst it is possible to rasterize the page using a page description languag... | 07/04/2006 |
| 7068391 | Proofing method, apparatus, and computer software product matching color and halftone screen properties A method, apparatus, and computer software product to reproduce an input image on a proofing device including accurately reproducing color substantially matching the screening properties of an imaging process that includes screening. The proofer may use a different ... | 06/27/2006 |
| 7034928 | Reading apparatus A reading apparatus comprises a plurality of sensor modules having different resolutions. The sensor modules are arranged in a main scanning direction on a read surface to be used for different purposes of inspecting or identifying. ... | 04/25/2006 |
| 7030888 | Color processing The invention provides a color processing method comprising determining whether a desired mapping between a first arrangement, including a first color device, and a second arrangement, including a second color device, exists, and automatically producing a mapping be... | 04/18/2006 |
| 7006253 | Image processing apparatus A number of character string determination sections determine whether a pixel of interest corresponds to a character or a line drawing. The character string determination sections use mutually different determination methods. A character determination selector secti... | 02/28/2006 |
| 7002708 | Delayed decision dot placement for plane-dependent CMYK error diffusion A printing method and system thereof are described. The locations in a printed image for a plurality of first color (e.g., cyan) dots and the locations in the printed image for a plurality of second color (e.g., magenta) dots are determined. Locations in the printed... | 02/21/2006 |
| 6982799 | Creating composite page images from compressed data A printhead controller controls printing of a page by at least one printhead. The printhead controller, in use, receives data, in a compressed format relating to the page to be printed, the data including a page description comprising a bi-level black layer and a co... | 01/03/2006 |
| 6930808 | Image processing apparatus and method A buffer memory has a plurality of blocks which are virtually broken up into a matrix pattern. An image processing apparatus has a memory controller for writing R, G, and B image data in the buffer memory in units of lines and in a predetermined color order, and rea... | 08/16/2005 |
| 6924908 | Color management systems and methods with improved color matching techniques Improved color management techniques use sample identifiers that define sample color areas having core areas and buffer areas adjacent the core areas. The core area defined by each sample identifier includes a unique set of colors. However, the buffer area defined b... | 08/02/2005 |
| 6924819 | Image processor An image processor includes: a color conversion unit for converting an input signal to color signals of at least four colors; a gamma correction unit for performing gamma correction on the color signals; a binarization unit for binarizing the color signals through c... | 08/02/2005 |
| 6859289 | Print engine/controller with color mask A print engine/controller (10) to drive an ink drop print head has an interface (22) at which to receive compressed page data, decoders (28,88) to decode respective types of image planes in the received compressed page data, and a half-toner/com... | 02/22/2005 |
