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| Number | Title | Issue Date |
| 8004732 | Image processing apparatus and method thereof When a halftone dot region includes a character or line drawing, high extraction performance of a halftone dot region cannot be obtained. Hence, the isolation amount of a pixel of interest is calculated, and the isolation amounts are integrated in a plurality of are... | 08/23/2011 |
| 7999979 | Image forming apparatus In an image forming apparatus which forms an image on a photosensitive member, the image formed on the photosensitive member is classified by a respective kind of the image. The image forming apparatus comprises a storage unit which stores a cumulative value of a pi... | 08/16/2011 |
| 7990592 | Methods and systems to produce consistent spot colors for multi-color print engines This disclosure provides methods, systems and apparatus to manage spot colors for an image marking device. Specifically, disclosed is a spot color control method including selecting a gain matrix K from a plurality of gain matrices, the gain matrix K being selected ... | 08/02/2011 |
| 7835046 | Data processing apparatus, data processing method, computer program, and storage medium A data processing apparatus includes a first processing unit for executing color conversion processing and halftoning processing of data before composition processing of data, a second processing unit for executing color conversion processing and halftoning processi... | 11/16/2010 |
| 7738149 | System and method for managing electronic transmission of color data The present invention relates to a system and method for electronically communicating, coordinating and disseminating product designs, specifications and production-related data between a plurality of parties. More particularly, the invention relates to the coordina... | 06/15/2010 |
| 7466465 | Load allocation when executing image processing using parallel processing For image processing for repeatedly executing process segment sets including N (N is an integer of 3 or greater) unit process segments Lc, Lm, Ly, Lk, Llc, Llm and Ldy, unit process segments are executed by M (M is an integer of 2 or greater but less than N) process... | 12/16/2008 |
| 7460285 | Load allocation when executing image processing using parallel processing For image processes performed repeatedly using a plurality of processing units on a plurality of partial images aligned mutually adjacent to each other, specified processing is performed. This image process includes (i) a first-type process segment on first partial ... | 12/02/2008 |
| 7436559 | Load assignment in image processing by parallel processing In image processing carried out by means of repeated execution of process set which includes N unit processes (where N is an integer equal to 3 or greater), prior to execution of the process groups, the N unit processes are assigned to a number M (where M is an inte... | 10/14/2008 |
| 7420708 | Method for processing color image data employing a stamp field A method for processing image data that employs a stamp field that contains data representing a distance metric for use with a variety of error diffusion operations. The distance metric possesses distance-order preservation permitting the distance from a previous do... | 09/02/2008 |
| 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 |
| 7375856 | Halftone screen frequency and magnitude estimation for digital descreening of documents An efficient method and system for eliminating halftone screens from scanned documents while preserving the quality and sharpness of text and line-art is disclosed. The method and system utilizes one or more independent channels with different sensitivities (e.g., M... | 05/20/2008 |
| 7375866 | Image processing system and method for screening A system and method for printing an image on a document by generating RGB data from a scanned image, converting the RGB data to CMYK data and identifying one of a first and a second type of screening. The type of screening is identified for a first one of the CMYK d... | 05/20/2008 |
| 7369270 | Print engine/controller and printhead interface chip incorporating the engine/controller A print engine/controller suited to use with a drop on demand print head. The print engine/controller works with compressed page data having both JPEG contone image layers and a bi-level image plane compressed using a Group 4 facsimile protocol. It receives compress... | 05/06/2008 |
| 7369272 | Accuracy of color conversion profile A method for determining lattice points to be referenced to prepare the correspondence defining data, said method including steps of prescribing a smoothness evaluation function which evaluates smoothness of arrangement of lattice points in the device-independent co... | 05/06/2008 |
| 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 |
| 7365883 | Dither matrix design using sub-pixel addressability A method of generating a dither matrix for an output device having sub-pixel addressability that permits the attenuation of tone for less than whole pixels. An original representative pixel grid is expanded to a super-resolution by replication of the pixel grid in b... | 04/29/2008 |
| 7362472 | Color error diffusion A method for multi-toning an input digital image having input pixels with two or more color channels to form an output digital image having modified output levels. The method includes producing an error signal for each color channel, combining the error signals to p... | 04/22/2008 |
| 7362319 | Method and apparatus for auto-generation of horizontal synchronization of an analog signal to a digital display Determining a horizontal resolution and a phase of an analog video signal arranged to display a number of scan lines each formed of a number of pixels is described. A number of initialization values are set where at least one of the initialization values is a curren... | 04/22/2008 |
| 7355756 | Color electrophotographic apparatus and method of processing an image produced thereby An image reproduction engine which causes toner to adhere to a development region of certain area located at a certain position within dots according to image reproduction data is utilized for image processing, wherein a halftone is expressed by means of halftone sp... | 04/08/2008 |
| 7355753 | Color saturation adjustment A method of adjusting primary color data values including producing color saturation adjusted primary color data values that depend on a relative amount of chroma in the initial primary color data values. ... | 04/08/2008 |
| 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 |
| 7352493 | Enhancement of glossmark images at low and high densities The present invention relates to expanding the range of image densities over which the manipulation of differential gloss as may be inherent in halftoned images may be achieved. By selectively applying halftones with anisotropic structure characteristics which are s... | 04/01/2008 |
| 7345791 | Image processing device and image processing method An image processing device for processing an input image so as to reproduce a halftone, includes: a matrix setting section for setting a threshold matrix having a plurality of elements arranged in M columns×N rows, at least two threshold values being stored in each... | 03/18/2008 |
| 7342683 | Data processing method for color management module A data processing method for a color management module (CMM), applying to image processing, including dividing an object data respectively into a meta file data, a CMM profile data and a screening/half-toning table. The meta file data is processed by a firmware of a... | 03/11/2008 |
| 7342684 | Image processing method and apparatus It is an object of this invention to prevent a false edge phenomenon in quantization processing for a multilevel image. In order to achieve this object, according to the invention, (1) a reference threshold (Cthreshold) to be used for error diffusion for a cyan (C) ... | 03/11/2008 |
| 7333244 | Method and system for embedding an image into two other images A method of embedding an image into two images by performing a digital halftoning process on a Cartesian product of color spaces to embed the image into the two images. A digital halftoning process includes an iterative isotropic halftoning process. The iterative is... | 02/19/2008 |
| 7333243 | Calculating error diffusion errors to minimize memory accesses The present invention relates to error diffusion logic in which three partial diffusion error values are produced in a pipelined manner and then summed together when the last partial error value is produced. The resulting summed error can be used to adjust a target ... | 02/19/2008 |
| 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 |
| 7327491 | Image processing apparatus, image processing method, computer program and computer-readable storage medium For M (magenta) and C (cyan), in a case of generating, e.g., ternary data of C0 to C2 and M0 to M2 respectively by using a look-up table on the basis of an error diffusion method, in a highlight portion of input M and C data (to which err... | 02/05/2008 |
| 7324247 | Image processing apparatus, image processing program and storage medium storing the program An image processing apparatus includes a reduced image generating part generating a reduced image having a lower resolution than that of an original digital image. A first extracting part distinctly extracts a first foreground image and a first background image from... | 01/29/2008 |
| 7324241 | Variable data differential gloss images The present invention relates to the segmentation of an image into a main area and a image segment for variable data differential gloss image control. A single color is selected. Two or more different color definitions are created by combining the selected single co... | 01/29/2008 |
| 7321450 | Image processing method, image processing apparatus, and recording medium According to an image processing method for performing color processing in accordance with a plurality of image objects, image data representing the plurality of image objects is input. The relationship between the plurality of image objects is analyzed. The plurali... | 01/22/2008 |
| 7319545 | Method and apparatus for calibration of a color printer A method permitting an end user to recalibrate a color reproduction device. The color reproduction device includes a device for converting the native color values of the scanner into a device independent color space, a test target, and the desired values of each pat... | 01/15/2008 |
| 7315398 | Multi-level error diffusion with color image data A method for processing color image data to generate multi-level image data with arbitrary output levels and arbitrary level spacing. The method identifies a gray level spacing for each of a first and second color separation pixels and scales the gray level for each... | 01/01/2008 |
| 7312799 | Visual determination of gamma for softcopy display Provided herein are teachings directed to calibrating an output device such as a color display, using a visual method of determining the gamma for the blue primary that is easier to perform and more consistent than methodologies employing a luminance-matching task. ... | 12/25/2007 |
| 7312901 | Image processing apparatus, image processing method, and program In an image processing apparatus which performs an error diffusion process to multivalued image data consisting of plural density components and outputs a result of the error diffusion process, the process result from a first error diffusion unit performing the erro... | 12/25/2007 |
| 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 |
| 7304771 | Apparatus for printing an image A method of receiving image data indicative of an image and providing to a printer print data, corresponding to said image data, the print data being in a predetermined print format and having a predetermined print resolution, the method including the steps of recei... | 12/04/2007 |
| 7301673 | Error diffusion processing method An error diffusion processing method includes determining a binary value of an input pixel according to a grayscale level of the input pixel, searching a nearest pixel that has the same binary value as the input pixel, and comparing a measured actual distance with a... | 11/27/2007 |
| 7286266 | Printer and image processing device for the same A printer is capable of expressing halftones by forming halftone spots in cells each having a plurality of pixels by irradiating an exposure beam. The printer comprises a halftone processing section for converting M-bit image data into N (M>N)-bit drive pulse width ... | 10/23/2007 |
