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| Number | Title | Issue Date |
| 7646513 | Image processing device and method thereof Provided is an image processing device and method capable of making the joint of an original image and a reverse image less noticeable. A CPU processes image data stored in an external memory device for storing an information resource for an electronic game, and dis... | 01/12/2010 |
| 7471422 | Computer program and method for generating a multiple-bit image data file from a 1-bit image data file A computer program and method for generating from a 1-bit image data file a multiple-bit image data file, which, when displayed on a computer display screen, resembles an image that would appear on an output medium as a result of an output device printing the 1-bit ... | 12/30/2008 |
| 7436545 | Method of forming image, image forming apparatus, and program for carrying out the method If an ink for a particular color (for example, red) having an excellent color developing characteristic is used in addition to inks for three primary colors of subtractive color mixture, the high color reproducibility is to be maintained for a long period. To accomp... | 10/14/2008 |
| 7385730 | Image processing apparatus, image processing method, and printing apparatus and printing system using the image processing apparatus In an apparatus for performing printing using a color ink-jet head having a plurality of ink-discharge-port strings corresponding to ink materials having different color tones, a high-quality image having excellent gradation can be recorded, while reducing the cost ... | 06/10/2008 |
| 7365881 | Halftone dot-growth technique based on morphological filtering A method for converting an original halftone bitmap image to a color converted halftone bitmap image. A set of asymmetrical morphological filters is provided. The original halftone bitmap image is segmented into blocks and for each block: apply the set of morphologi... | 04/29/2008 |
| 7330291 | Dither mask creating method and creating device In a computer generation of a dither mask for conversion of a continuous-tone image into a halftone image, a pixel array having a size in accordance with the dither mask is partitioned into blocks. Initial pixel values are determined such that the occurrences of pix... | 02/12/2008 |
| 7310168 | Method and apparatus for controlling a spot function for digital halftoning A digital halftoning technique for controlling a spot function is disclosed. A method for generating a spot for use in halftoning according to the present invention includes defining a spot function that combines two functions selected to provide a predetermined spo... | 12/18/2007 |
| 7268920 | Halftone patterns The patterns can be used to reduce one or more undesirable effects such as moire or colour shift in coloured halftone images. Colour screens in the images are based on a combination of non-orthogonal mesh structures with parcels of printing dots which have common sh... | 09/11/2007 |
| 7151618 | Halftone dot producing apparatus and halftone dot producing program storage medium There are disclosed a halftone dot producing apparatus in which a phase of halftone dots is freely set up in at least one color plate of the color plates. The halftone dot producing apparatus has an image pixel position deriving section for deriving pixel positions ... | 12/19/2006 |
| 7130079 | Selective screening method A method of automatically selecting screen characteristics value to be used for printing a color image, comprising the steps of: forming a digital representation of the color image, the digital representation comprising a plurality of separations; dividing at least ... | 10/31/2006 |
| 7126613 | Graphic processing method A graphic processing method is implemented to determine which processing method is to be performed to improve graphic processing speed. First, it is determined whether the document page to be processed includes a large amount of graphics, in which case the document ... | 10/24/2006 |
| 7110607 | Image processing apparatus A multilevel image into which a color or a black-and-white image is converted is input, and a slightly indistinct binary image generating unit generates a slightly indistinct binary image that includes a slightly indistinct line pattern and does not include backgrou... | 09/19/2006 |
| 7085017 | Polar halftone methods for radial printing Disclosed are apparatus and methods for implementing polar halftone techniques that substantially reduce or eliminate interference patterns while printing on rotating circular media with a radial print system. In one embodiment, Cartesian image pixels are selected s... | 08/01/2006 |
| 7085002 | Defective nozzle compensation An image recording apparatus (2000) is disclosed, which comprises forming elements (2002) for forming an image, a memory (2006) indicating relative desirability of utilising the forming elements (2002) for forming the image, and processin... | 08/01/2006 |
| 7031025 | Combined dot density and dot size modulation A combined dot density and size modulation system uses dispersed dot halftoning in conjunction with dot size modulation to produce a halftone image in which both the density and size of the dots are modulated to control overall gray level. The dot density and size m... | 04/18/2006 |
| 6985262 | Method for four-color zero-moire halftoning using non-orthogonal halftone cells The invention provides methods for using single-cell non-orthogonal cluster screens to satisfy the moiré-free conditions for four-color halftoning. The selection of these single-cell halftone screens is determined by identifying combinations of four of the halftone... | 01/10/2006 |
| 6829995 | Form of a printing element in an offset printing process The printing element is in the shape of a propeller. All the printing elements in a printing dot have S-shaped sides of equal length all round. The lands between adjoining printing elements are of constant width all round a printing element. Due to this figuration, ... | 12/14/2004 |
| 6804031 | Method and apparatus for image processing capable of efficiently performing a gray-scale correction A novel image forming apparatus which makes gray-scale by performing at least one of operations including a manipulation of a plurality of dots arranged in a form of matrix, a single-dot-based density adjustment, or a single-dot-based size adjustment, includes a dot... | 10/12/2004 |
| 6697170 | Devices and methods for offset and similar printing systems A method for producing a half-tone image faithfully representing a continuous-tne original includes a step of forming in the image a pattern of substantially continuous, substantially parallel lines at a frequency of between about 100 and 400 lines per in... | 02/24/2004 |
| 6661535 | Moire fringe eliminating apparatus and a method for eliminating moire fringes In a moire fringes eliminating apparatus, a moire fringe eliminating unit comprises a halftone dot feature extracting unit, a re-calculation unit, a re-calculation deciding unit, and a halftone dot shape changing unit. The halftone dot feature extracting ... | 12/09/2003 |
| 6466225 | Method of halftoning an image on a video display having limited characteristics A method of halftoning input image data intended for reproduction on a display (114) having a plurality of pixels (23-27) and a limited pixel response time (see FIG. 1) is disclosed. In a first halftone cycle (K=n), the method comprises (first) halftoning... | 10/15/2002 |
| 6456396 | Method and apparatus for generating a screened reproduction of an image A method for generating a screened reproduction of an image includes the steps of providing a representation of an original, defining a desired screen dot arrangement for the image, and writing screen dots in a line by line fashion. The representation of ... | 09/24/2002 |
| 6204930 | Method of generating gradation-corrected image data, method of generating gradation-corrected halftone dot percentage data, method of generating gradation-corrected threshold data, image output apparatus, and method of calculating amount of exposure A gradation-corrected image data is generated by converting an input gradation image data depending on conditions of an output machine and thereafter scanning a recording medium in the output machine with a light beam based on the gradation-corrected imag... | 03/20/2001 |
| 6198545 | Method and apparatus for generating halftone images by evolutionary screen dot contours The present invention is related to the synthesis, display and printing of halftone images. The invention comprises a method capable of generating screen elements with sophisticated screen dot shapes such as artistic shapes, microletters and ideograms. Th... | 03/06/2001 |
| 6081345 | Line screen having extended dynamic tone range for embedding machine readable data in halftone images A high performance halftone shape for embedding machine readable data in printed documents is based on a hyperbola to accommodate the embedded data over an extended dynamic tone range. The shape enables precise tone control and can used for color printing... | 06/27/2000 |
| 6072592 | Method and apparatus for preparing color screens in a halftone image The dot patterns can be used to reduce dot gain and moire effects in halftone images involve printing areas that have inwardly curved edges and variable elongation. Colored images having screens that use these patterns can be printed with the screens at 4... | 06/06/2000 |
| 5949966 | Multiple tonal range image processing system A host computer converts an entered gray scale image into a raster image expressing multiple tonal ranges, using an intermediate spot pattern determined in advance. Here, the intermediate spot pattern is a spot pattern composed of pixels which can take on... | 09/07/1999 |
| 5801838 | Method and device to improve print quality of gray scales and color for printers Method to improve the printing quality at reproduction of half-tone originals by means of printers of the type, in which a number of dots are brought together in a cell (pixel). A minimum of two dots form a cell where each dot in the cell is controlled in... | 09/01/1998 |
| 5742743 | Apparatus and method for generating a screen reproduction of a color image including dot shape rotation Apparatus and method for screening an image for half-tone reproduction by image reproduction apparatus which includes a marking device, preferably a laser beam, which is operative to mark a medium along a multiplicity of parallel marking lines. The method... | 04/21/1998 |
| 5699174 | Apparatus and technique for generating a screen reproduction of an image A technique for screening an image for half-tone reproduction by image reproduction apparatus including a marking device which is operative to mark a medium along a multiplicity of parallel marking lines including the steps of providing a digital represen... | 12/16/1997 |
| 5691828 | Apparatus and technique for generating a screen reproduction of an image A technique for screening an image for half-tone reproduction by image reproduction apparatus including a marking device which is operative to mark a medium along a multiplicity of parallel marking lines including the steps of providing a digital represen... | 11/25/1997 |
| 5687005 | Method of optimizing the reproduction of a picture copy through minimization of elementary halftone cell overlap Method of optimizing a reproduction of a picture copy includes scanning a picture copy optoelectrically for generating scanning signals, in accordance with the scanning signals, electronically screening the picture copy and inscribing a recording medium s... | 11/11/1997 |
| 5446558 | Apparatus and associated method for representing elliptical halftone dots An apparatus and method are implemented in a halftone printing system utilizing logic blocks that permit a halftone elliptical dot to be represented by an elliptical envelope that is formed from a combination of straight lines that are drawn from tangent ... | 08/29/1995 |
| 5355793 | Method and apparatus for making a mimeographic printing plate A heat-sensitive material is used for making a mimeographic printing plate. The plate material includes a screen where printing ink is passable, and a resinous membrane formed on its surface. The resinous membrane is heated and melted so as to form a numb... | 10/18/1994 |
| 5239391 | Apparatus for generating halftone dots from dot envelope parameters An apparatus, implemented in a halftone printing system, permits a halftone dot to be represented by an envelope that is formed from a combination of straight lines that are drawn from tangent points, on the outer periphery of the dot, to a reference axis... | 08/24/1993 |
| 5233441 | Method for representing halftone dots with dot envelope parameters A method is implemented in a halftone printing system that permits a halftone dot to be represented by an envelope that is formed from a combination of straight lines that are drawn from tangent points, on the outer periphery of the dot, through reference... | 08/03/1993 |
| 5144337 | Image forming apparatus capable of forming an image by dots having various diameters An image forming apparatus capable of changing the diameter of a dot in the main and subscanning directions to form various kinds of dots and thereby high resolution images with tones. A data converting circuit separates input image data into pulse width ... | 09/01/1992 |
| 5122883 | Raster scanning engine driver which independently locates engine drive signal transitions within each pixel A raster scanning print engine driver accomplished by establishing a pixel scan time period representing a pixel print area, generating a number of pixel signals independently representative of the position and of the length of each line segments to be pr... | 06/16/1992 |
| 5055923 | Method of and apparatus for recording halftone images and halftone images produced thereby A printed image (It4) is produced with halftone images for respective color printers while so-called rosette moire and a color shift from an original iamge are prevented. Halftone dots (Hm4, Hc4, Hk4) are formed... | 10/08/1991 |
| 4727430 | Halftone image recording method and apparatus therefor A halftone image is reproduced and recorded by photoelectrically scanning an original in the following manner. One of the density range, hue range and coordinate range of the original or an image, which has been obtained by modifying the original as desir... | 02/23/1988 |
