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7626730 |
Method of making a multilevel halftone screen
A three-dimensional halftone screen is provided that is suited for multilevel printing. The three-dimensional halftone screen includes a plurality of planes each corresponding to one or more input...
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7619780 |
Method for performing duplex copying
A method for performing duplex copying of a document having a first side with a first image and a second side with a second image includes scanning only the first side of the document under a first...
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7619777 |
Method of generating halftone screen and system thereof
A halftone screen generating method includes growing dot centers into uniform binary patterns in an input image, calculating a main distance of each dot center, forming a screen filter by using the...
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7614716 |
Apparatus discriminating type of recording medium and method of discriminating type of recording medium
A method of discriminating a type of recording medium and a discriminating apparatus in which the type of recording medium is discriminated based on a temperature change of the recording medium...
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7605949 |
Image processing apparatus and image processing method adapted to correct color unevenness
An image processing apparatus includes a storage unit that stores a correction amount used to correct color unevenness of an image according to a plurality of halftone screening conditions; and a...
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7589865 |
Variable differential gloss font image data
The present invention relates to the expedient supply of differential gloss text into a document image, particularly as when desired in the employ of rendering variable data. A font character is...
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7586648 |
Variable-dot halftoning
A method for enabling a program that communicates a document description from a composition system to a printing system to manage variable-dot halftones for use with variable-dot printing devices,...
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7580153 |
Printed visible fonts with attendant background
The present invention relates to the expedient supply of differential gloss or other correlation mark text into a document image via a font definition, particularly as when desired in the employ of...
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7561303 |
Caching and optimisation of compositing
A method ( 1500 ) of generating a representation of a page ( 1000 ) to be rendered is disclosed. The page ( 1000 ) comprises one or more graphic objects ( 1080, 1090 ), each being defined by two or...
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7557962 |
System and method for tone-dependent multi-frequency halftone screening
The present invention is directed to a system and method for halftone screening. A system for halftone screening includes means adapted to receive image data having a desired number of tonal levels...
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7545537 |
Bandless halftone design for multiple beam printers employing non-orthogonal halftones
A multiple beam printer system having N laser beams receives print job information from a print host. A rendering application uses a threshold array to generate halftone image data from the print...
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7528846 |
Systems and methods to adjust a source image aspect ratio to match a different target display aspect ratio
Systems and methods for adjusting a source image aspect ratio to match a different target display aspect ratio are described. In one aspect, the systems and methods determine that a source image...
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7508549 |
Method and apparatus for multi-color printing using hybrid dot-line halftone composite screens
A method and apparatus for generating a multicolor image using halftone screens employs a dot structure dot growth pattern for one or more of the colors and a line structure dot growth pattern for...
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7483587 |
Iterative filtering for dithered imaging
Filtering image information to generate a dithered image includes receiving input image information corresponding to an image generated using a first array comprising a first number of smaller...
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7480072 |
Efficient and flexible multi-bit halftoning
An implementation of a technology, described herein, for efficient and flexible multi-bit halftoning on a marking device, such as a printer. At least one implementation of the technology, described...
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7477415 |
Image processing method and apparatus
A first conversion table defines a plurality of grid points that are arranged in a predetermined color space. The grid points include a darkest grid point that is indicative of a darkest point...
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7460277 |
System and method for halftoning using a time-variable halftone pattern
Successive frames or images of an input image that are presented to the output device are individually halftoned. A starting location within the input image for tiling one of one or more halftone...
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7450270 |
Image data processing methods, hard imaging devices, and articles of manufacture
Image data processing methods, hard imaging devices, and articles of manufacture are described. According to one embodiment, an image data processing method includes accessing image data of an...
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7450121 |
Dynamic bit depth rendering
A method is described of compositing a plurality of graphical objects to create an image comprising a plurality of parts, where the parts may be a run of pixels along a scanline or a region of the...
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7430064 |
Rotation dependent halftone rendering in scanning
A method and system for rotation-dependent halftone rendering. An image input is received from a scanning system or other source, the received image being either a contone image or an...
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7397583 |
Method and device for proofing raster print data while maintaining the raster information
The screened printing data are subjected to a filtering method, the raster information being maintained. Intermediate tonal values are produced by the filtering method, using the binary tonal...
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7394570 |
Method and apparatus for eliminating seams in screened image data for repetitive printing
A method of modifying screened image data so that there is no visible seam when the image is printed repeatedly in a circumferential direction, for example using a drum output device. One version...
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7394572 |
Method and apparatus for processing of half-tone image
In the present invention, in an image output apparatus having a specific resolution, a micro normal random number or a blue noise is synthesized in threshold matrix having a plurality of half-tone...
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7391537 |
User interface for differential gloss images
The present disclosure relates to providing a user interface for the effective generation of differential gloss images. The user is instructed to indicate the base primary image data, and the...
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7382495 |
Reduction of differential gloss
A method for reduction of differential gloss as found in hardcopy image prints. The method comprises selecting a first halftone having a high apparent gloss characteristic and a second halftone...
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7379212 |
Print processing apparatus and print processing method
The present invention provides a print processing apparatus which enhances the legibility of specific print contents such as a small-sized character. In the step executed in case it is determined...
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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...
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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...
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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...
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RE40170 |
Multi-tone image processing method and apparatus
A multi-tone image processing method and apparatus in which mutually dissimilar tone levels are realized by changing the additive condition of recording energy by means of different recording...
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7345789 |
Image processing apparatus for prepress printing and prepress printing system
A RIP system ( 100 ) includes a multi-screening information generator ( 102 ) for generating a multi-screening information file (D ms ) which is an XML-format file containing information such as...
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7342696 |
Computational moiré compensation
The amount of moiré in halftone printed images is reduced using unique moiré intensity functions and moiré vectors in a halftoner. In various embodiments, moiré phase angle zones are determined...
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7333237 |
Color adjustment method, color adjustment apparatus, color conversion definition editing apparatus, image processing apparatus, program, and storage medium
Adjustment object color space containing movement source partial color space including a color of an object of conversion processing and movement destination partial color space including a color...
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7312900 |
Method of descreening screened image, method of separating screened image into regions, image processing device, and program
A method of performing a descreening process with high accuracy by separating a first region from which a gradation area is to be derived and a second region from which a monotone area is to be...
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7304770 |
Reduction of differential gloss with halftoned clear toner
A method for reduction of differential gloss as found in halftone image hardcopy prints. The method comprises selecting either a single halftone or employing two halftones: a first halftone having...
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7301675 |
Glossmark images with clear toner
The present invention relates to creating differential gloss images in clear toner by the manipulation of halftones employed prior to the depositing of the clear toner layer upon a substrate. By...
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7286253 |
Data processing apparatus capable of viewing and printing a plurality of screens
A communication apparatus is provided which makes it possible to print out all data larger than a display screen in one operation. In addition, the communication apparatus reduces time required for...
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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...
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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...
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7265876 |
PWM rendering for color/gray-scale text and graphics for laser printer
The appearance of edges in an image is improved through precise placement of subpixels within pixel cells that are located on or near edges in an image. Image data is examined to identify a...
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7251059 |
System for distinguishing line patterns from halftone screens in image data
In a system, such as in a digital copier, for classifying image data derived from an original image, the image data is classified by type. An algorithm is applied to the gray levels of pixels...
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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...
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7224489 |
Font characteristic driven halftoning
Characteristics of text or text components or features are considered when selecting halftoning screens. For example, an italic slant angle of text is recognized and used to select or generate a...
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7224488 |
Method of correcting threshold array, dot pattern data structure, method of correcting pixel layout of image, and method of determining threshold array for generating image
A threshold array having an array of thresholds for reproducing a gradation with a dot pattern as a clustered pattern of dots each made up of one or more blackening pixels is corrected. At least...
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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...
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7187475 |
System and method for a robust de-screening filter
A method and apparatus for de-screening a halftone image, therefore allowing the recovery of an approximation of an original image, is disclosed. A method according to one embodiment first performs...
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7180635 |
Halftone image gloss control for glossmarks
The present invention relates to the manipulation of differential gloss as may be inherent in halftoned images. By selectively applying halftones with anisotropic structure characteristics which...
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7170639 |
Halftone method and apparatus that provides simultaneous, multiple lines per inch screens
A halftone threshold matrix includes a plurality of submatrices, wherein a first group of the plurality of submatrices has a line screen frequency different from a second group of the plurality of...
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7158264 |
Method of determining threshold array for generating gradation image
Halftone image data is generated according to a threshold array in which thresholds T up to a given gradation have been determined, and candidate pixels to be blackened are then determined. Then, a...
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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...
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