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| Number | Title | Issue Date |
| 8111429 | Apparatus and method for dithering for multi-toning A method and apparatus for dithering for multi-toning are provided. The apparatus includes a mask-pattern-generating unit that generates a mask pattern on R channel, G channel and B channel by selecting pattern values constituting the mask pattern on the channels ba... | 02/07/2012 |
| 8059312 | Calibration data creating device A calibration data creating device includes a reference measured density memory, a dither data memory, a corresponding set density determining unit, a calibration data creating unit, and a calibration data creating unit. The reference measured density memory stores ... | 11/15/2011 |
| 8009328 | Document optimization using solid monochrome colors and outlining Methods of the present invention allow for optimization of color and shades of gray documents prior to their conversion to a monochrome format. If color/gray elements are identified in the document, the distance between them and their intensity is determined. If the... | 08/30/2011 |
| 8004719 | Threshold matrix generation method, threshold matrix generating apparatus, and recording medium A plurality of types of basic tiles are arranged in a matrix area while prohibiting an arrangement of only ON or OFF elements in two rows and two columns, to acquire an element matrix representing an arrangement of dots in a gray level of 50%. After one element is s... | 08/23/2011 |
| 7995245 | Document optimization using solid monochrome colors and outlining Methods of the present invention allow for optimization of color and shades of gray documents prior to their conversion to a monochrome format. If color/gray elements are identified in the document, the distance between them and their intensity is determined. If the... | 08/09/2011 |
| 7973976 | Dither matrix generator, print product, method for generating a dither matrix, program product, and image processing device A dither matrix generator includes: a main-cluster generator that generates at least one main-cluster in a matrix, the matrix including a plurality of cells, the main cluster area including a predetermined number of cells; a sparest searcher that searches a sparest ... | 07/05/2011 |
| 7969617 | Multilevel screening mapping tone values to control signal values for greater color or shade fidelity and reduced print aberrations A method of producing a printed output on a substrate is provided using a drop emitting device which is adapted to emit a plurality of ink quantities in response to a control signal. The method comprises the steps of receiving image data corresponding to a pixel of ... | 06/28/2011 |
| 7961355 | Generation of dither matrix A printing method includes: providing a print head that includes a plurality of nozzle arrays for ejecting at least 3 colors of inks; performing a halftone process with a dither matrix on image data to generate dot data that represents a state of dot formation at ea... | 06/14/2011 |
| 7948659 | Halftoning device and halftoning method and laser printer including the same A halftoning device that converts an input pixel signal of 8 bits per pixel into an output pixel signal of r bits per pixel(r | 05/24/2011 |
| 7920293 | System and method for patterned encoded halftoning A preferred embodiment reproduces an image by receiving an input contone array of M contone data values. The contone data values may lie within a range from 1 to N. The embodiment includes comparing each contone data value to an array of M sets of pattern look-up ta... | 04/05/2011 |
| 7898693 | Fast generation of dither matrix This invention provides a method of generating a dither matrix that stores each of a plurality of threshold values in each of elements for determining a status of dot formation of each print pixel of a print image to be produced on a printing medium by carrying out ... | 03/01/2011 |
| 7898694 | Printer controller for a pagewidth printer configured to perform ink counts Provided is a printer controller for a pagewidth printer having a printhead configured to print ink supplied from an ink cartridge with print quality information. The controller includes a processor having an address, data and control bus, an expander unit and a dec... | 03/01/2011 |
| 7872777 | Document optimization using solid monochrome colors and outlining Methods of the present invention allow for optimization of color and shades of gray documents prior to their conversion to a monochrome format. If color/gray elements are identified in the document, the distance between them and their intensity is determined. If the... | 01/18/2011 |
| 7869094 | Selective dithering Techniques are disclosed for selectively dithering only a subset of a digital image. One or more ranges of digits are selected for dithering. Only those pixels having digits within the selected range(s) in the digital image are dithered. The image is printed after b... | 01/11/2011 |
| 7843607 | Method for processing digital image data A method for processing digital image data (ID) is proposed wherein a step (B) of processing digital image data (ID) comprises or realizes a sub-step (B′) of image improvement with respect to said digital image data (ID) which uses or which is based on a process o... | 11/30/2010 |
| 7813007 | Image processing system determining dot formation for each pixel group and method for the same The present invention provides a dot data processing apparatus for generating data of dots to be formed on a printing medium. The apparatus includes: a decoding preparation unit that prepares a decoding table for pixel groups, each of the pixel groups grouping toget... | 10/12/2010 |
| 7796303 | Image processing system, image processing device, dot data processing device, and method and program product therefor Sets of multiple pixels are grouped into pixel groups, and on the basis of tone value distribution in each pixel group, it is decided whether to divide the pixel group. For pixel groups that are not divided, a representative tone value is determined for the pixel gr... | 09/14/2010 |
| 7791765 | Method and apparatus for optical dithering A method for optical dithering and a dither device comprising a mounting structure, a refractive optic, an optic mounting structure surrounding the optic, and one or more linear drive motors. Four linear coils are preferably employed together with a control system o... | 09/07/2010 |
| 7768673 | Generating multi-bit halftone dither patterns with distinct foreground and background gray scale levels A multi-bit halftone generating system provides for halftone intergeneration in printers which can print dots of plural gray scale levels. Input image data includes information for more gray scale levels than can be handled by those associated with a printing device... | 08/03/2010 |
| 7764402 | Fast generation of dither matrix The invention provides a dither matrix generating method. This method generates a dither matrix for determining a status of dot formation on each of print pixels of a print image to be formed on a print medium in response to input image data. The method comprising: ... | 07/27/2010 |
| 7746502 | Dither matrix producing method and apparatus, image processing method and apparatus, image forming method and apparatus, program and recording medium A main vector: m^=(mx, my) and a sub-vector: s^=(sx, sy) determining cyclic structure of a basic matrix are defined, and a positional vector for a pixel configuring the basic matrix Pi^=(Pix, Piy) is defined, where the suffix i denotes an i-th pixel configuring the ... | 06/29/2010 |
| 7742195 | Image processing device, image processing method, and program product for the same An image printing process of the invention first specifies a pixel group tone value of each pixel group consisting of a preset number of multiple pixels and refers to one of correlation maps selected for the pixel group to convert the specified pixel group tone valu... | 06/22/2010 |
| 7733534 | Image processing method, image processing apparatus, image forming apparatus, and recording medium In an image processing apparatus that performs a dither processing using a dither matrix based on the result of determination of the segmentation class to which the pixel to be processed belongs, to perform the dither processing, any of a plurality of pairs of thres... | 06/08/2010 |
| 7733533 | Generating threshold values in a dither matrix Provided are a method, system, and program for generating threshold values in a dither matrix. A dither matrix of threshold values is generated. The threshold values in the dither matrix are filtered to generate a filtered dither matrix of filtered dither values by ... | 06/08/2010 |
| 7724396 | Method for dithering image data A method for dithering image data is provided. The method is suitable for representing A-bit grayscale values with a B-bit resolution, where A and B are positive integers and A>B. The main steps of the method include calculating 2A target grayscale values... | 05/25/2010 |
| 7719720 | Image processor and method for selecting a procedure of dithering thereof Selecting a corresponding procedure of dithering according to a general pattern of gray levels of sub-pixels of each color of an input image. This will enable the input image to be displayed on a display with a lower bit depth. ... | 05/18/2010 |
| 7719721 | Information processing method and information processing apparatus Setting of growing directions of dots in a dither matrix is facilitated. During defining of the growing directions of the dots corresponding to cells in the dither matrix, a target cell in the dither matrix is defined. When the growing directions of the dots in cell... | 05/18/2010 |
| 7710605 | Print system and printer A print system includes a computer and a printer. Image data having pseudo gradation with a dither pattern are printed by the printer. The computer divides the image data into predetermined areas, determines whether or not a dot arrangement pattern of image data in ... | 05/04/2010 |
| 7701615 | Image forming method and image forming apparatus Whether or not a density of black is a predetermined value or more is judged, and when it is judged to be the predetermined value or more, a resolution characteristic is changed to an improved resolution characteristic compared to the resolution characteristic used ... | 04/20/2010 |
| 7623270 | Method of processing a digital image by means of ordered dithering technique description A dither matrix is applied to a high-resolution image to compare the value of each of the pixels that compose it with a threshold value of the matrix and to obtain an output value of the matrix (Dither matrix value) from each comparison. To each pixel value of the i... | 11/24/2009 |
| 7586649 | Method and device for compressing image data A method for compressing image data that are processed by a pseudo gradation process using a dither pattern is provided. The method includes the steps of dividing the image data into predetermined areas, determining whether or not a dot arrangement pattern of the im... | 09/08/2009 |
| 7580156 | Image processing system, image processing device, dot data processing device, and method and program product therefor Pixels are grouped into groups of pixels, comprising a plurality of pixels each, and representative tone values are determined for each of a plurality of regions into which the groups of pixels are split. Decisions are made as to whether or not to output dots to the... | 08/25/2009 |
| 7532365 | Threshold matrix generation method, threshold matrix generation apparatus, and recording medium In a threshold matrix generation part 3 implemented by a computer, a tint image in a specified gray level is generated from temporary lighting order set in a matrix area, and a smoothing operation is performed on the tint image, to generate a grayscale evalua... | 05/12/2009 |
| 7532364 | Image processing device, image output apparatus, and storage medium storing image processing program An image processing device converts multi-gradation image data to low-gradation image data for outputting an image of a dot pattern that is formed by a high-density first part formed in a band shape by dots connected in a predetermined direction and a low-density se... | 05/12/2009 |
| 7522312 | Threshold matrix, a method of generating the same, and a method of reproducing color image A dot pattern with a plurality of pixels representing a two-dimensional image is formed on a printing plate material by applying laser beams, which are turned on and off for each pixel depending on dot pattern data, to the printing plate material in a main scanning ... | 04/21/2009 |
| 7515303 | Process for the modeling of dots for a screen A process for the modeling of dots in the generation of a threshold matrix for a screen for the production of a screen form for the printing of image data. The dots are described by model points built up from computed points with an assigned density value. For model... | 04/07/2009 |
| 7511856 | Threshold matrix, storage unit for storing threshold matrix as data, and raster image processor incorporating storage unit A normalization threshold side size Nr which serves as an index indicative of how many times the pattern frequency r is repeated in one threshold matrix is defined as Nr=N×r/R where N represents a size of one side of the threshold matrix as the number of pixels, an... | 03/31/2009 |
| 7505177 | Method for generating a threshold value matrix for frequency modulated half-toning A method for generating a threshold value matrix is used in the frequency-modulated half-toning of the image data to be reproduced. A threshold value matrix for a basic screen is generated in that low-pass filters of different width are applied to the bit patterns g... | 03/17/2009 |
| 7492482 | Image processing apparatus, image processing method and image processing program An image processing apparatus having an arithmetic processing section for quantizing multi-density level image data and converting the image data into digital halftone image data for outputting. The arithmetic processing section is configured to create a plurality o... | 02/17/2009 |
| 7446904 | Methods and apparatus for generating dither mask through interpolation between preferred patterns Techniques for generating dither masks are provided. A dither mask is generated by selecting a sequence of at least three original patterns comprising pixels of at least one of a first color and a second color. At least two patterns are interpolated to generate inte... | 11/04/2008 |
