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Class 358/3.06 - Halftoning (e.g., a pattern of print elements used to represent a gray level)


Subclass of Class 358 - Facsimile and static presentation processing
Definition: Subject matter wherein a discrete gray level of the multi-level
No. of patents: 471
Last issue date: 05/29/2012


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NumberTitleIssue Date
8189236Image processing apparatus, image processing method and computer-readable medium
An image processing apparatus includes a first edge extracting unit and a binarizing unit. The first edge extracting unit extracts an edge of chromatic components of a color image other than brightness components of the color image. The binarizing unit performs an e...
05/29/2012
8169667Performing halftoning by plurality of halftoning mechanisms
A controller is to receive a halftoning job having a number of pages. The controller is to divide each page into a number of sections. A number of halftoning mechanisms correspond in number to the number of sections into which each page is to be divided. Each halfto...
05/01/2012
8169666Threshold matrix generation method, halftone image generation method, and halftone image generating apparatus
Each of moire elements which are repeat elements of first-order moire appearing by overlaying halftone images of first and second color components is positioned at one of candidate positions arranged at a moire pitch Pm in first and second moire directions orthogona...
05/01/2012
8164795Device, method, and computer program product for creating print data
A device for creating print data utilized by a printer is disclosed. The print data includes a coordinate at which a dot is to be formed on a print medium by the printer. The print data creating device is provided with a first device and a second device. The first d...
04/24/2012
8159720Color error diffusion
Halftoning is performed on a source image. The halftoning includes error diffusion processing of one separation based on error diffusion processing of another separation. The error diffusion processing includes determining a rendered pixel value for the one separati...
04/17/2012
8154767Image processing apparatus and image processing method with color shift correction
Image formation free from quality degradation is achieved by selecting whether to perform correction of color shift before or after a halftone process. When the amount of color shift is determined as larger than a predetermined threshold value, the halftone process ...
04/10/2012
8149462Line printer
A plurality of types of positional shift postulated patterns are postulated wherein the positional shift of print head tips in a printer are postulated to have positional shift directions and distances. For each of the postulated positional shift postulated patterns...
04/03/2012
8149463Information processing apparatus, image processing apparatus and method thereof, which create and use a halftone screen
A halftone screen which is applicable to a low-resolution electrophotographic printer is created. Hence, dot-lattice points arranged in a predetermined region are displaced using rotation processing, the predetermined region is partitioned into polygons each of whic...
04/03/2012
8111428Halftone image generation method, threshold matrix generation method, threshold matrix, printing plate manufacturing method, and printing plate
In a halftone image formed on a printing plate for letterpress printing, a minimum halftone dot has a square main cluster consisting of 9 pixels and four sub-clusters located around the main cluster radially, each of which is one pixel. Each sub-cluster contacts wit...
02/07/2012
RE43149Method for generating a halftone of a source image
In one aspect of the present invention, a method is provided for producing a halftone of a source image. The halftone includes halftone pixels. The halftone pixels are suitable for containing halftone dots. The method selects glyphs corresponding to intensities of r...
01/31/2012
8098404Content-aware uniform rosette color halftone image resizing using iterative determination of energy metrics
As provided herein, there are supplied teachings to systems and methods for resizing a digital uniform rosette halftone image composed of multiple colorant separations, by using uniform rosette halftone tile parameters and iterative determination of energy metrics. ...
01/17/2012
8098405Laser print apparatus with dual halftones
A printing system comprises a memory configured to store image data representing an image. The printing system comprises a processor configured to perform a first digital halftone process on a first portion of the image and a second digital halftone process on a sec...
01/17/2012
8077356Content-aware halftone image resizing using iterative determination of energy metrics
As provided herein, there are supplied teachings to systems and methods for resizing a halftone image using halftone tile parameters. One approach entails receiving into a digital imaging system, a digital halftone image and a desired resizing factor for that digita...
12/13/2011
8077357Content-aware resizing of uniform rosette color halftone images
As provided herein, there are supplied teachings to systems and methods for resizing a digital uniform rosette halftone image composed of multiple colorant separations, by using uniform rosette halftone tile parameters. One approach entails receiving into a digital ...
12/13/2011
8072648Halftone independent correction of spatial non-uniformities
The predicted tone response curve for each color channel and halftone is predicted using a binary printer model and stored, wherein the “predicted tone response curve” provides a model based approximation of the actual response for the printer for each addressab...
12/06/2011
8049929Color management of halftoned images
Aspects of color of a halftoned image are controlled or adjusted. A method for adjustment can include determining a color description of a color of an area or window associated with a target halftoned pixel, determining a desired adjustment to the color associated w...
11/01/2011
8049930Method of halftone watermarking for hiding multi-tone watermark or two-tone watermark
A method is performed to hide a watermark in two halftone images or in a single halftone image. The halftone image contains information of the hidden watermark, and each pixel value of the halftone image is associated with a corresponding offset value. The offset va...
11/01/2011
8045233Method for controlling the shapes of FM-AM mixed dots on a multi-bit depth imaging apparatus
Disclosed is a method for controlling the shapes of FM-AM mixed halftone dots on the multi-bit depth imaging apparatus. In the prior art, since the reproduction of the shapes of the dots in various gradations is absolutely based on the theory of random error diffusi...
10/25/2011
8045232Image display medium, method and system for preparing composite image display data
An image display medium displays an image including a first region having a first composite image. The first composite image includes a first display image and a first latent image. The first display image includes at least one of a first halftone dot image and a fi...
10/25/2011
8040567Image processing method, program, recording medium, image processing device, and image forming apparatus
An image processing method configured to produce image data output from an image forming apparatus configured to form an image by using a recording head composed of a liquid ejecting head having plural arranged nozzles configured to eject a liquid drop and an energy...
10/18/2011
8031373Method for adaptively screening a continuous tone original and device for carrying out said method
A method of converting two-dimension signal including multilevel tone values of areas of the original into two-dimension halftone print copy signal including two-level tone values of printed and blank elements thereof includes, forming two types of two-dimension wei...
10/04/2011
8023153Content-aware halftone image resizing
As provided herein, there are supplied teachings to systems and methods for resizing a halftone image using halftone tile parameters. One approach entails receiving into a digital imaging system, a digital halftone image and a desired resizing factor for the digital...
09/20/2011
8018623Multi-level halftoning providing reduced error diffusion artifacts
A method for multi-level error diffusion halftoning an input digital image to form an output digital image with reduced error diffusion texture contouring artifacts which includes modifying the input pixel values for a fraction of the input pixels using a periodic d...
09/13/2011
8014032Electrophotographic image forming apparatus and halftoning correction method thereof
An electrophotographic image forming apparatus and a halftoning correction method thereof are provided. The electrophotographic image forming apparatus according to the example embodiments of the present invention, comprises a storage unit storing a plurality of dot...
09/06/2011
8004718Post RIP trapping
Image data representing an image is obtained, raster image processing is performed on the image data, and then trapping is performed on the image data after raster image processing. The trapping may be performed based on a tag plane generated during the raster image...
08/23/2011
7995244Halftoner block employing average values and shifts
Halftoning apparatus and method that may generate and employ average values and shifts are described herein. The apparatus may include an unpacker to determine shifts and average values for a plurality of input pixel values, each pair of average value and shift bein...
08/09/2011
7995243Image processing apparatus and control method thereof
The invention distinguishes not only character areas and halftone dot areas in an image, but also makes highly accurate decisions concerning characters present in halftone dot areas. A decision signal generating unit generates a decision signal having luminance as a...
08/09/2011
7986441Embedding watermark into halftone image with low distortion using parity values for overlapping groups of candidate sites
System and methodologies are provided herein for low-distortion image watermarking. Parity relationships between multiple pixels and/or regions of an image can be leveraged as described herein to reduce the amount of toggling required to embed a watermark in an imag...
07/26/2011
7978372Printhead driven by multiple print engine controllers
A print engine controller configured to be coupled with others to drive an ink drop printhead comprising: an interface at which to receive compressed page data; image decoders to decode compressed image planes in the received compressed page data; a half-toner/compo...
07/12/2011
7973974Method, apparatus and article of manufacture for modifying printing based upon direct on-the-fly media characteristic parameters
A method, apparatus and article of manufacture for modifying printing based upon direct on-the-fly media characteristic parameters is disclosed. The present invention on-the-fly directly measures a media characteristic parameter and performs real-time print modifica...
07/05/2011
7973975Image processing apparatus and image processing method
An image processing apparatus includes an image input device to convert image data into uncompressed data of CMYK, a gradation processing device to perform a gradation process on the uncompressed data to generate a halftone image, a rearrangement determination devic...
07/05/2011
7965419Image processing device and printing apparatus for performing bidirectional printing
This invention provides a printing apparatus that performs printing on a print medium. The printing apparatus includes: a dot data generator that performs a halftone process on image data, wherein the print image is formed by mutually combining print pixels belongin...
06/21/2011
7948658Tone reproduction curve linearization
A marking device is controlled to mark a media sheet with halftone dots selected from a set of image halftone dot representations. The marking device is controlled to mark a monitored surface with halftone dots selected from a set of control halftone dot representat...
05/24/2011
7936480Printer having a controller method of printing with low and high speed nozzle firing modes
A method of page expansion and printing of image data received by a printer from a computer includes the steps of receiving the image data from the computer, the data having a bi-level black layer compressed in an EDRL (Edge Delta and Runlength) format and a continu...
05/03/2011
7924465Dither matrix, image processing method, storage medium, image processing apparatus, image forming apparatus, and image forming system
A disclosed dither matrix is used in halftone processing for converting input image data having M input halftone levels into output image data having N (M>N>2) output halftone levels. In the halftone processing, a concentration type dither matrix is used as the dith...
04/12/2011
7898692Rosette printing with up to five colors
Disclosed herein is a method and apparatus for moiré-free color halftone printing with up to five color image separations. The method and apparatus utilize a plurality of non-orthogonal halftone screens to produce outputs that are moiré free and form rosettes. The...
03/01/2011
7880932Halftone dot formation method and apparatus for reducing layer thickness of coloring material inside halftone dots, and image formation apparatus
An image processing method generates a halftone-dot image by forming a halftone dot, which is represented by a set of one or plural output dots and corresponds to an intensity of an input image signal, while making a part of the dots constituting the halftone dot to...
02/01/2011
7869093Method and system for improved copy quality in a multifunction reprographic system
A method and system reconstructs a contone image from a binary image by first tagging pixels to identify one of a multiplicity of image content types. The tag information and the pattern of bits surrounding the pixel to be converted to a contone value are used to re...
01/11/2011
7835034Halftone method and apparatus that provides a line screen frequency of N/2 for a printer resolution of N dots per inch without negative print effects
A halftone method and apparatus provides a line screen frequency of N/2 for a printer resolution of N without negative print effects. A 300 lines per inch halftone screen for a 600 dpi printer may thus be created by alternating white and saturated colored lines when...
11/16/2010
7826097Asymmetrical digital filters for dot gain adjustments
A method for adjusting dot-gain for a halftone binary bitmap file comprises inputting a halftone binary bitmap file consisting of binary pixels (400) to an asymmetric digital filter (500). The binary pixels are filtered with the asymmetric digital filt...
11/02/2010
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