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7623271 |
Automatic grainy noise control for optimal macro uniformity appearance
A system's intrinsic mottle & graininess levels are either measured or predicted based on the knowledge of system states including material states and actuator states. The optimal amount of total...
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7619775 |
Image forming system with density conversion based on image characteristics and amount of color shift
An image forming system includes an information processing apparatus and an image forming apparatus. The information processing apparatus performs image generation, color conversion, and extraction...
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7599098 |
System and methods for color matching overprinted documents
A system and methods for color matching overprinted graphic documents is described. Graphic elements in a document are examined to determine overlapping regions. The overlapping graphic elements in...
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7593135 |
Digital image multitoning method
A method for multitone processing an N level digital image to produce an M level digital image wherein M<N, includes the steps of: determining M reconstruction levels based on the gray level...
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7580156 |
Image processing system, image processing device, dot data processing device, and method and program product therefor
Pixels are grouped into groups of pixels, comprising a plurality of pixels each, and representative tone values are determined for each of a plurality of regions into which the groups of pixels are...
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7567363 |
Image processing method incorporating decompression
A method is provided for image processing a page to be printed. The method includes the step of respectively decompressing a bi-level black layer and a contone layer of a page to be printed. The...
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7564588 |
Image forming device, image forming method, and recording medium that provide multi-level error diffusion
An image forming device includes a quantization unit which quantizes each pixel of an M-level gradation input image into one of N levels (M>N≧2) through an error diffusion process. An...
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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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7554696 |
Dot-gain reduction method for multi-level halftoning
A method for minimizing color-image halftone dot-gain in the output of a multi-level halftone color-imaging output device. The method includes characterizing that device's halftone output, on a...
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7545539 |
Apparatus and method for adjusting sharpness of image
A method for adjusting a target gray level of a target pixel based on a spatial mask is provided. The target pixel is surrounded with N adjacent pixels; each of the N adjacent pixels respectively...
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7545540 |
Method and system for processing color image data
A system and method remove at least one color from a color image in a chrominance-luminance color space. The processing method includes generating screen values for machine independent color space...
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7545976 |
Method and apparatus for associating image enhancement with color
Provided is a method and apparatus of processing an image using filters. The method and apparatus receives an input pixel and a pixel array associated with the image, identifies a color of the...
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7528992 |
Image processing device and image processing method
If a false edge will possibly occur at a portion in an image where the input pixel value. Iin is equal to the value (R j +F), where j=N, S, M, or L, the noise value N is generated when the input...
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7518748 |
Printable file repurposing method remapping image data to a primary resolution and assinging values to a macro pixel
The present invention addresses the reformatting of a digital “ready to print” data file into a continuous tone (32 or 24 bit) file whereby discrete values in the tone range are uniquely...
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7515310 |
Programmable gain amplifier with hybrid digital/analog architecture
Circuits, devices, and methods for enabling the digitization of scanned images with an Analog Front End (AFE) circuit. The AFE circuit includes a sampler for sampling a signal produced by an image...
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7511852 |
System and method for variable copying or reproducing a plurality of documents
This invention is directed to a system and method for variable copying or reproducing for a plurality of documents. More particularly, this invention is directed to a system and method for...
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7511858 |
Method for printing a visual printer calibration test pattern
A method of printing a test pattern including printing cyan or magenta in a test region using a default printer half-tone, printing a yellow in a reference area portion of the test region using a...
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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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7499193 |
Image forming apparatus
There is described an apparatus, which includes an image-forming section to form a multicolor image on a recording medium by recording the unicolor images in such a manner that the unicolor images...
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7486413 |
System and method for displaying an image
A system ( 48 ) and an associate method for soft proofing image ( 69 ) before print, a system ( 48 ) comprise the image ( 69 ) being displayed at a desired scale and resolution ( 202 ) such that...
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7486420 |
Flexographic printing
A method of screening a continuous tone image into a halftone representation for a flexographic printing operation can compensate for characteristic printing problems in highlight areas by...
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7480078 |
Method and system for performing multi-pixel parallel error diffusion enabling high-speed diffusion processing without increasing the system clock rate
A method and system for performing error diffusion are disclosed. An ordered set of pixels, including a pixel intensity value for each pixel, is received. Each pixel intensity value includes a...
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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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7471418 |
Image/document analysis tool and method for multi-station image forming device
A document analysis tool may generate a halftone image corresponding to the output of an image forming device and may display the generated halftone image for a document designer. The halftone...
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7466455 |
Image processing method and system for performing monochrome/color judgement of a pixelised image
An image processing system and method are provided for judging whether a pixelised image or a part thereof is a monochrome or a color image. To increase the reliability of the judgement, instead of...
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7466453 |
Image processing apparatus
An edge area is detected from an image as a first characteristic. It is possible that the first characteristic can not be detected. An edge is detected from the image as a second characteristic....
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7463387 |
Multilevel value output device
When the input value becomes close to the medium dot relative density value (Den_M), the large dot threshold value (Thre_L) and medium dot threshold value (Thre_M) become close to each other. It is...
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7460272 |
Image processing apparatus, image processing method, and image processing program
An image processing apparatus includes a correction data generation section, a binarization section, an edge pixel setting section, and a selection section. The correction data generation section...
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7450266 |
Color cast reduction system and method
In one embodiment, a print system includes an anticipated ambient lighting selector to allow selection of an anticipated ambient lighting. A rendering module is configured to map a print job into...
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7443541 |
Image processing apparatus and image processing method
An image processing apparatus includes: a recording rate determining section for determining a recording rate of each of a plurality of dot types having different densities per unit area from each...
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7440142 |
Image processing system with multi-valued processing
An image processing system receives an input gradient number m, input image data I(x,y) whose input gradient number is m, and an output gradient number n and calculates output image data O(x,y)...
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7420710 |
Optical proximity correction in raster scan printing based on grayscale manipulation of the bitmap
Methods and apparatus for correcting defects, such as rounded corners and line end shortening, in patterns formed via photolithography are provided. Such defects are compensated for...
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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...
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7408672 |
Image processing apparatus, image forming apparatus and image forming method
When a print key on a console panel is depressed, a main CPU confirms enlargement/reduction rate information input via the console panel, and then, performs line thinning by setting a line thinning...
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7375857 |
Print proofing with color and screen matching
A proof generation method is disclosed for proof printers. The method includes receiving halftoned primary color print data to be printed on a target halftone printing press. This halftoned primary...
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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...
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7359092 |
Picture image input method
A picture image input method includes inputting a picture image of an object as a picture image signal. A histogram of a frequency with respect to brightness information of the picture image signal...
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7349125 |
Application specific integrated circuit (ASIC) in the form of a printer processor
A processor is provided for a printer. The processor includes an address, data and control bus. An expander unit is coupled to the bus and is configured to decompress a bi-level black layer of a...
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7327373 |
3D dither algorithm
A four-time resolution refinement of 3D-dither algorithm is provided in this present invention. A 4×2 pixel-block is treated as an observed unit in this present invention, which includes two 2×2...
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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...
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7312898 |
Transformation of an input image to produce an output image
An input image is transformed to produce an output image. First pixels occurring at edges within the input image are detected. Second pixels that are part of text within the input image are also...
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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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7307760 |
Raster image path architecture
A raster image path architecture having the capacity for supporting the rendering and output of a device-independent grayscale raster image, while also offering the capacity for supporting the...
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7295348 |
Processor for image processing, method of processing image using the same, and printer incorporating the same
There is generated a virtual tile set which virtually covers color planes of an original image without any clearance or overlap by combination of Penrose-type virtual tiles to be non-periodically...
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7292374 |
Method and apparatus for image processing capable of efficiently performing a gray-scale correction
A novel image forming apparatus which makes gray-scale by performing at least one of operations including a manipulation of a plurality of dots arranged in a form of matrix, a single-dot-based...
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7259888 |
Image file bit depth expansion and subsequent manipulation
The present invention addresses the reformatting of a digital “ready to print” data file into a continuous tone (32 or 24 bit) file whereby discrete values in the tone range are uniquely...
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7253924 |
Method of imaging multiple binary bitmaps in a single pass
A method for printing multiple binary bitmaps ( 10 ) with an original density level ( 12 a ) and a color ( 18 ), wherein the color ( 18 ) is the same for all the multiple binary bitmaps ( 10 ), by...
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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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7245398 |
Image-processing device independently controlling each of functions that correct density of image
An image-processing device includes an image-reading unit that reads image data from a document optically, an image-recording unit that records the image data read onto recording paper, 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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