| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 358300200 | Screen property or geometry (e.g., shape, period, symmetry, aspect ratio) | 15 |
| 20090009811 | Method for screening an image - To improve the rendering of a printing, a halftone rendering method is applied. This method optimally comprises a step for the adaptive tiling of the image. This tiling is based on a subdivision of the image by self-similar structures. These subdivisions are locally limited by the local intensity of the image. These local limitations make the tiling adaptive. The result of this tiling is a cloud of sampling structures, each of these structures being associated with a pixel of the image and a label produced during the tiling. The intensity of the pixel, and the label, enable the reading, in a table of correction vectors, of a correction vector corresponding to a shift to be applied to the pixel before it is printed. The table of the correction vectors is pre-computed in using a relaxation algorithm. | 01-08-2009 |
| 20090213430 | System and Method for the Generation of Correlation-Based Digital Watermarks Using Uniform-Rosette Color Halftoning - Systems and method for digitally reproducing a moiré-free color halftone output image having an embedded correlation-based digital watermark are provided using an enhanced halftone screen set consisting of a halftone screen for each of N colorants forming N color separations (where N≧3). The N different uniform rosette halftone screen configurations are generated such that each meets uniform rosette halftone screen conditions. A corresponding three-dimensional threshold array is generated for each halftone screen configuration having a phase shift value as an input. The color input image is halftoned, halftoning each one of the N different color separations using a corresponding halftone screen configuration and three-dimensional threshold array to form a moiré-free color output image having the correlation-based digital watermark embedded therein. A single key can be used to produce a full color image of the output image having the watermark image visible therein. | 08-27-2009 |
| 20100097658 | METHOD FOR THE DIGITAL SCREENING OF HALFTONE IMAGES - A method for the digital screening of a halftone image by using a first screen having an arbitrary desired screen width and an arbitrary desired screen angle. For the method, the threshold value matrix of a second screen with a different screen angle and width is read out and compared with the color values of a halftone image presented. In order also to approximate screens having a particular irrational tangent and to avoid unpleasant sudden exposed device pixels in clear regions, it is proposed to provide at least one second threshold value matrix having X | 04-22-2010 |
| 20110090537 | SCREEN DESIGN FOR PROCESS VARIATION ARTIFACT REDUCTION - In a method for designing a halftone screen configured to reduce artifacts in a printed image, artifacts due to a process variation resulting from printing of the image through use of a halftone screen design are modeled and the halftone screen is designed to have threshold values that substantially reduce the artifacts due to the process variation. | 04-21-2011 |
| 20110157654 | SYSTEM AND METHOD FOR HALFTONING USING A PARAMETRICALLY CONTROLLED HEXAGONAL HALFTONE DOT SHAPE THRESHOLD FUNCTION - Methods and apparatuses for halftoning an image are provided using a parametrically controlled hexagonal halftone dot shape threshold function that reduces tone reproduction irregularities in the halftoned image which can occur at darker gray levels. The halftoning transforms image data representing contone image pixels into halftoned image data in the form of clustered-dot hexagonal halftone screens for representing halftone dots of a halftoned image. Weight parameters can be used to control the rate at which a respective vertex of a halftone dot approaches a vertex of a neighboring halftone dot in relation to gray level. The hexagonal halftone dot shape threshold function can also control the shape of the sides of the halftone dots. | 06-30-2011 |
| 20110292450 | HALFTONE TILING AND HALFTONING FOR ANNULAR RASTERS - An aspect of the present disclosure provides a halftoning method for annular rasters comprising: using annular rasters with uniformly spaced raster lines and uniformly spaced pixels within the raster lines; angularly tiling wedge shaped halftone cells around at least a partial circumferential print medium wherein an integer number of wedge tiles fills a disc space; wherein the annular rasters are considered in arcs and wherein pixel thresholds in the wedge shaped halftone cells are considered in arcs so as to conform to the annular rasters upon tiling the wedge shaped halftone cells; and, setting the number of pixel thresholds in each arc raster of the cell to an integer value near a desired writing resolution to enable seamless tiling wherein the number of thresholds increase as a function of a wedge cell radius. | 12-01-2011 |
| 20120133990 | 3-COLORANT DOT-OFF-DOT (DOD) PERIODIC HALFTONE GEOMETRY - Provided is a 3-colorant DOD (dot-off-dot) periodic halftone geometry used to render an image. The DOD 3-colorant halftone geometry includes a base colorant halftone screen with hexagonally tiled halftone dots arranged in a hexagonal pattern, the hexagonally tiled halftone dots having a first fundamental frequency vector V | 05-31-2012 |
| 20120147428 | PRINTING METHODS AND APPARATUS - A method of generating a printable image from a base image includes identifying parameters of a printer on which the printable image is to be printed, and creating a bit map image from a plurality of sub-cells, the identified parameters, and the base image. | 06-14-2012 |
| 20120229862 | PRINT APPARATUS - A print apparatus includes an edge detector using attribute information, a screen processor which binarizes each pixel included in image data with a screen processing, a pulse width converter which converts each pixel included in the image data to pulse width data in accordance with an input gradation value, and an output unit which outputs pulse width data from either of the screen processor or the pulse width converter for each pixel. The output unit outputs the pulse width data from the pulse width converter for an edge pixel and outputs the pulse width data from the screen processor for a non-edge pixel. | 09-13-2012 |
| 20120274984 | POLYGONAL-BOUNDARY-BASED HALFTONE METHOD - As set forth herein, computer-implemented methods and systems facilitate halftoning using boundaries and centers of a polygonal tiling with a parameterized spot function that operates within the tiles. Defining the halftone structure includes defining the polygonal tiling with a specification of the polygon boundaries and center, and setting and applying parameters of the spot function, which utilizes center-to-boundary distances. The tiling can be defined explicitly, by defining a tile structure, or providing centers, one per polygon, and vertices for the polygons. The vertices and centers are used to generate the polygon boundaries. The polygonal tiling can be regular (e.g., repetitive) or irregular, and can also be varied in a manner adapted to the image content or to data that is being embedded. | 11-01-2012 |
| 20130258413 | PRINT QUALITY CONTROL METHOD - A print quality control method, including the steps of: providing a visual referring target on the printing substrate, setting a specific halftone of black “K”; creating a neutral grey tone i.e. NGT; placing tightly both MGT and NGT next to each other across the printing surface; and comparing both printed tones result. By adopting the grey balance theory and visual matching technique, the resultant can provide accurate ink balance information for the production personnel to immediate execute the correction on the imbalance inking condition during production. | 10-03-2013 |
| 20130321870 | PRINT CONTROL TERMINAL, IMAGE FORMING APPARATUS, PRINT CONTROL METHOD, AND IMAGE FORMING METHOD - A print control terminal including a user interface to receive a setting of a print command and print options of a document, a screen selection unit to select a halftone screen to be applied to the document, a transparency multiple number selection unit to select a transparency multiple number to correspond to the selected halftone screen, a print data generation unit to generate print data of the document according to the selected transparency multiple number, and a communication interface to transmit the generated print data and the print options to the image forming apparatus. A transparency multiple number is changed according to the characteristics of a halftone screen to improve quality of an output image. | 12-05-2013 |
| 20140002864 | Amplification Modulation Screening Method And Apparatus | 01-02-2014 |
| 20140268240 | System And Method For The Accelerated Screening Of Digital Images - Writing unscreened raster image data into a computing device that contains multiple elements capable of screening raster image data, and executing a plurality of processes within the multiple elements, wherein segments of the unscreened raster image data are simultaneously screened by the plurality of processes. The computing device could utilize graphical processing units, field programmable gate arrays, application specific integrated circuits or other processing devices. | 09-18-2014 |
| 20150341526 | METHOD AND SYSTEM FOR FORMING A HALFTONE SCREEN - A method of forming a halftone screen, the method comprising: representing a first tone range by forming a plurality of dots arranged in a grid; representing a second tone range by forming a plurality of substantially cross-shaped dots arranged in a grid, the cross-shaped dots contained within respective dot cells and having four arms, a distal end of at least one of the arms wider than a proximal end, the second tone range darker than the first tone range; and representing a third tone range by forming a plurality of substantially cross-shaped dots arranged in a grid, the cross-shaped dots contained within respective dot cells and having four arms, a proximal end of at least one of the arms wider than the proximal end of at least one arm of the cross-shaped dots representing the second tone range, the third tone range darker than the second tone range. | 11-26-2015 |
