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| Number | Title | Issue Date |
| 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 |
| 7372594 | Image processing apparatus and method, and storage medium A pattern which does not appear at a flat portion in normal binarization processing is set as a code pattern, and a code formed from this pattern is attached. At this time, code attachment with little degradation in image quality is implemented by selecting an unnot... | 05/13/2008 |
| 7369276 | Multi-level halftoning providing improved texture uniformity A method for multi-level halftoning an input digital image to form an output digital image which includes a multi-level error diffusion halftoning process incorporating periodic dither signals whose amplitudes are adjusted as a function of the error-diffusion textur... | 05/06/2008 |
| 7369277 | Image processing apparatus, drawing processing method, and computer program A drawing instruction processor refers to a bit map line table that shows whether the bit arrays in the row unit are the same in the order of concentrations. The drawing instruction processor decides whether dither patterns to be used for the adjacent specified draw... | 05/06/2008 |
| 7352373 | Systems and methods for multi-dimensional dither structure creation and application Embodiments of the present invention comprise systems and methods for creation, modification and implementation of dither pattern structures. ... | 04/01/2008 |
| 7352489 | Color error diffusion method for multi-level output device An improved color-image error diffusion process for use in conjunction with the operation of a multi-level, halftone, color-image output device. This process involves, first, performing output-device-dependent color error diffusion on color-image input data utilizin... | 04/01/2008 |
| 7327898 | Reducing boundary effects for images with screen patterns A method is disclosed which reduces the boundary effects on an image based on maintaining local gray. The image is first halftoned and an adjustment is then made at the boundary region to minimize the brightness deviation of the halftone from the original contone. T... | 02/05/2008 |
| 7321674 | Method of normalising a digital signal representation of an image A digital signal representation of an image is normalized by applying a normalization parameter to all pixels of the digital signal representation of the image or to the pixels of a multi-scale representation of the image. The normalization parameter can be derived ... | 01/22/2008 |
| 7298525 | Image processing device and image processing program for processing a plurality of color signals formed of a plurality of color components In a halftone module, it is judged whether or not the value “rate” for each pixel is greater than zero (0). In other words, it is judged whether or not the eight-bit input data Iin of each pixel is around a half of the relative density value for a small dot of a... | 11/20/2007 |
| 7286701 | Image synthesis apparatus and image synthesis method Original YC data is converted to Bayer data, and the converted Bayer data is inversely gamma-converted. Picked-up YC data which is a synthesis object is also converted to the Bayer data, and the converted Bayer data is inversely gamma-converted. These inversely gamm... | 10/23/2007 |
| 7277204 | Stochastic halftone screening method A method of building threshold matrices for stochastic screening by using the actual size and shape of imaged pixel and/or pixel agglomerate instead of the nominal one, in the stage of calculating appropriate threshold matrices. For each relevant combination of imag... | 10/02/2007 |
| 7277203 | Method of improving start-up behavior for color error diffusion digital half-toning A method for initializing a printing system using error diffusion is discussed. In application of the invention to color printing systems, the method initializes a first error buffer with a first set of seed values and then initializes at least one other error buffe... | 10/02/2007 |
| 7277201 | Systems and methods for designing digital anamorphic line screens Historically, the creation of digital line screens was considered to be a subset of the creation of the digital cluster dot screens. The geometric constraints necessary for digital cluster dot screens were imported into the creation of digital line screens. Accordin... | 10/02/2007 |
| 7268790 | Display system with framestore and stochastic dithering A display system provides temporal stochastic dithering to image data for storage in a frame buffer for display. Stochastic dithering is used to reduce the size of the frame buffer and the complexity of the drive circuitry that is used to display an image in accorda... | 09/11/2007 |
| 7265875 | Halftone super-cell optimization for artifact reduction Artifact reduction is achieved by altering the growth of sub-cells for each super-cell in either a pre-determined or random manner. The means of alteration is selected such that the sum of all the groups equals a halftone value. In another embodiment, the random gro... | 09/04/2007 |
| 7251060 | Image-processing device using quantization threshold values produced according to a dither threshold matrix and arranging dot-on pixels in a plural-pixel field according to the dither threshold matrix The image-processing device comprises a quantization threshold produce unit producing quantization threshold values corresponding to each pixel of multivalued image data according to a dither threshold matrix, a random dither quantize unit quantizing the multivalued... | 07/31/2007 |
| 7239429 | Method and apparatus for generating dispersed cluster screen A method for generating a dispersed cluster screen defining a stable environment for printing an image is provided. The method initiates with generating a pattern of cluster centroids. Then a cluster growth sequence is defined. Next, a cluster is grown around the cl... | 07/03/2007 |
| 7231096 | Screening method for overlapping sub-images A method and system for reproducing an image on a carrier, the method includes: generating a conjoined first and second sub-image, each representative for a portion of the image; defining an overlap region where both sub-images give a contribution to the internal op... | 06/12/2007 |
| 7193751 | Tag control for runtime glossmarks The present invention relates to the manipulation of differential gloss as may be inherent in halftoned images by utilization of tags. By selectively applying halftones with anisotropic structure characteristics, which are significantly different in orientation whil... | 03/20/2007 |
| 7151619 | Image formation apparatus An image formation apparatus includes an aperiodic data generating unit for generating aperiodic data between pixel areas having a neighboring relation every pixel area comprising a plurality of pixels having an interlocking relation of the image data, a threshold v... | 12/19/2006 |
| 7148999 | Variable glossmark The present invention relates to the segmentation of an image into a main area and a image segment for variable glossmark data. By selectively applying halftones with anisotropic structure characteristics which are significantly different in orientation while remain... | 12/12/2006 |
| 7139397 | Hybrid architecture for realizing a random numbers generator A hybrid architecture for realizing a random numbers generator comprising a digital circuitry portion able to provide for a random bytes sequence as well as an analog circuitry portion able to provide a seed of the true random type is described. ... | 11/21/2006 |
| 7139101 | Anisotropic stochastic screen A system and method for the halftoning of gray scale images by utilizing a pixel-by-pixel comparison of the image against an anisotropic stochastic screen is disclosed. The anisotropic stochastic screen comprises a non-deterministic, non-white noise function which, ... | 11/21/2006 |
| 7123382 | Method for bayer mosaic image conversion A method of, and an apparatus for, image conversion. The three color channels of a Bayer mosaic image are up-interpolated from input space to output space. The pixels sampled from each two-dimensional color plane of the Bayer image are convolved with a coefficient k... | 10/17/2006 |
| 7095530 | Color vector halftoning using a successive filling with improved color registration latitude A method is provided for rendering a color image with a plurality of separations with a halftone process using a single screen. The screen is comprised of a plurality of pixel locations with associated threshold values and the image is comprised of a plurality of se... | 08/22/2006 |
| 7095448 | Image processing circuit and method for modifying a pixel value An image processing circuit compares a pixel value to a threshold value and modifies the pixel value if the pixel value has a predetermined relationship to the threshold value. Alternatively, the image processing circuit generates a random number and combines the ra... | 08/22/2006 |
| 7092128 | Application of glossmarks for graphics enhancement The present invention relates to providing a designer with the tools for the manipulation of differential gloss in halftoned images. A special mask layer is provided for the rendering of desired glossmark image data. The desired glossmark image data is used to selec... | 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 |
| 7085016 | Method and apparatus for dithering and inversely dithering in image processing and computer graphics The invention provides a method and an apparatus for dithering, and inversely dithering an image. The apparatus makes use of a pixel address and a pixel data to locate a dither reference value from a dither matrix and use the dither reference value to convert an ori... | 08/01/2006 |
| 7081901 | Display system with framestore and stochastic dithering A display system provides stochastic dithering to image data for storage in a frame buffer for display. Dithering is used to reduce the size of the frame buffer and to reduce the complexity of the drive circuitry that is used to display an image. The bit depth of th... | 07/25/2006 |
| 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 |
| 7038814 | Fast digital image dithering method that maintains a substantially constant value of luminance A method and system are disclosed for displaying Y-bit coded RGB image data that is received as X-bit coded RGB or YCbCr image data, where X>Y. The method includes receiving X-bit coded image data, where each color channel comprises m-bits; arithmetically processing... | 05/02/2006 |
| 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 |
| 6993148 | Image processing apparatus and method, and storage medium This invention reduces degradation in image quality and improves altered portion specifying accuracy in a digital watermark technology. For this purpose, an apparatus of this invention inputs image data and information such as a copyright holder name to be embedded ... | 01/31/2006 |
| 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 |
| 6976915 | Gaming device display with simulated halftones A panel or reel strip of a gaming device that includes halftones. The panel or reel strip includes a medium and a photographically created multicolor image on one side of the medium. A silkscreen ink layer is provided on the other side of the medium. The ink definin... | 12/20/2005 |
| 6956673 | Image processing apparatus and method to reduce gray levels of image An image processing apparatus capable of providing an output image which is close to an actual image observed with human eyes is structured in the following way. An image data from an input unit is supplied from an output unit with a reduced number of gray levels. B... | 10/18/2005 |
| 6956676 | Methods and systems for providing halftone screens Halftone generating methods and systems convert continuous tone anti-aliased image data to halftone image data using halftoning techniques that efficiently use memory resources. One of a plurality of Holladay counters is selected and the address bits from the select... | 10/18/2005 |
| 6943816 | Laser-induced thermal imaging with masking The invention is directed to compensating for imaging aberrations that result from repeated passes by an imaging laser array. The aberrations may result from swath lines formed by thermal heating and from the ruling and screen angle of the image. The techniques desc... | 09/13/2005 |
| 6930801 | Method of determining threshold arrangement for generating gradation image, and apparatus for generating gradation image data A threshold arrangement capable of reducing a moiré pattern produced by an interference between the output resolution and halftone frequency of an image outputting apparatus is determined. Halftone dot image data is generated by a threshold arrangement determined u... | 08/16/2005 |