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7385731 |
Method and system for processing a multi-colour image
A method and system are provided for processing digital multi-colour images for the reproduction thereof on a colour printing and/or copying system. Particularly, the printing and/or copying system...
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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...
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7375853 |
Image processing apparatus and method
A separating unit determines, for an image data, whether there exists black data, and generates density data from the black data when the black data exists, and generates color data from data other...
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7372599 |
Image processor
An image processor has a controller unit connected to at least one of functional units such as an image reading unit, detects a source of input of image data according to a network I/F or a...
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7367156 |
Inkjet recording device and inkjet recording method
An inkjet recording device records images by forming dots on a recording medium with droplet modulating method. The inkjet recording device includes a recording unit, a multilevel-data creating...
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7359094 |
Image processing apparatus and image forming medium
The present invention performs printing without collapsing the appearance of the hyper document and embeds information about links in the printed hyper document so that access to the link...
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7359091 |
Multi-bit output sampled threshold array halftoner
Xerox Reference No. D/A0639A system and method for improving xerographic halftoning by magnifying a threshold array, interpolating the in-between values, enabling multiple thresholds to be accessed...
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7352492 |
Method for compensating for printer characteristics
What is disclosed is a method for compensating for printer characteristics having a tone reproduction curve which is either too rough to be fitted by interpolation or which does not have a simple...
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7342687 |
Image reading apparatus and light source stability determination method
A scanner has an imaging device which is constituted by a cold-cathode tube, includes a light source for irradiating light to a reflection surface of a reference white plate and a plurality of...
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7339698 |
Image processing method and apparatus
An image processing method and apparatus using an input unit for inputting image data, a processing unit for quantizing error-correction data obtained by adding error data to the image data input...
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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...
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7324239 |
Image forming device capable of preventing print overrun
Print data received from a host computer is divided into five bands, and expansion time required for expanding the print data is estimated. If it is determined based on the estimated expansion time...
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7324238 |
Image processing apparatus, method of setting tonal gradation conversion characteristics, and computer program
Four test patterns are concurrently displayed on a display of a computer. The test patterns include respective backgrounds and contrast areas. The test patterns, different from each other in pixel...
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7295714 |
Image processing circuit and image processing method that prevent problems occurring in image reduction
An image processing circuit reduces binary data of an original image. At least one line buffer stores data of each line of the original image. At least one line buffer stores data of each line of a...
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7292373 |
Method and apparatus for image processing capable of high speed processing
In a image processing apparatus executing an error diffusion process, normal error diffusion process is performed when an input pixel value is not “0”. When the input value is “0” (white...
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7265874 |
Image processing apparatus and method
An image processing apparatus processes multivalued color image data that includes a plurality of color components. The apparatus includes an adding unit to add per-color-component quantization...
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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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7258412 |
Ink-jet printing method, apparatus and system
An ink-jet printing method, an ink-jet printing apparatus and an ink-jet printing system, which are free from the deterioration of color development effect even if a plurality of color inks are...
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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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7239428 |
Method of super image resolution
A method of improving resolution for an image is disclosed. The method for improving resolution of an image includes loading a first image and creating a first super grid image based on the first...
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7236263 |
Image processing system and method for improved color conversion
A system and method for processing image data generates color image data from a scanned image, the color image data including RGB data, converts the RGB data to CMY data, and translates the CMY...
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7233414 |
Image recording apparatus and method, image reproducing apparatus and method, and recording medium on which image processing program is recorded
The present invention is intended to record image data having a wide dynamic range is a file together with image data having a narrow dynamic range. First, an image recording apparatus separately...
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7224490 |
Method of producing a printing plate on a cylindrical printing-plate carrier in a rotary printing press
A method of producing a printing plate on a cylindrical printing-plate carrier includes subdividing the printing-plate carrier by computation in terms of its width and axial length into at least...
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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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7224486 |
Image conversion method, image conversion apparatus, and image conversion program storage medium
In an image conversion method of performing an image conversion between binary area tonal image-to-binary area tonal image, an image conversion apparatus, and an image conversion program storage...
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7210757 |
Image processing method and apparatus, image forming apparatus and system, program and recording medium
Recording data is produced from first image data corresponding to each pixel with a first number of gradations so as to supplied to a recording apparatus, which expresses each pixel with a number...
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7206098 |
Method for avoiding print buffer underrun
In order to avoid print buffer under-run a printing method involves a printer printing a rendered first page of print data while another page is rendered in a connected computer. Simultaneously, a...
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7199905 |
Systems and methods for halftoning multiple color separation layers by interlayer error diffusion
Error diffusion halftoning systems and methods propagate the error both within a color layer and between the color layer being halftoned and subsequent color layers yet to be halftoned. Threshold...
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7196821 |
Image processing device, printing control device, image processing method, and recorded medium
When image data is converted into an expression format based on the dot on-off state, such conversion is performed in a unit of a raster group comprising a predetermined number of adjacent rasters....
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7196817 |
Printing of digital images using reduced colorant amounts while preserving perceived color
A method for modifying an input digital image having an (x,y) array of image pixels, each image pixel having an input code value for each of four or more color channels, to produce a depleted...
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7196815 |
Reproduction method for printing
To provide a reproduction method for printing wherein characteristic data of an original are transformed into data required for printing, with the dot gain being controllable so as to yield optimum...
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7190485 |
Method for multilevel printing of digital images using reduced colorant amounts
A method for modifying an input digital image having an (x, y) array of pixels, each pixel having an input code value for one or more color channels, wherein said input code value has a nonlinear...
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7170641 |
Method of generating medium resolution proofs from high resolution image data
A method provides for determining an optimal sample dimension when descreening high-resolution image data so that a lower resolution image color proof may be created without suffering the problems...
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7170640 |
Adequate quantisation in multilevel halftoning
The method reproduces an electronic image, having pixels, as a multilevel halftone image on a multilevel output device having N different allowed output values (possible density levels) by
...
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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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7130083 |
Image recording apparatus, image recording method, method for controlling the image recording apparatus, storage medium storing a program capable of being read by a computer, and image processing method
When recording a gradation pixel by performing pseudo-halftone processing, the occurrence of unevenness in the density in the recorded image is suppressed. For that purpose, when recording a...
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7110128 |
Controlling dot connectivity in binarizing an image
Communication with an external image output device is established via a network interface, information concerning the characteristics of the image output devices is received and is held in a...
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7106476 |
Image processing method, image processing apparatus, image forming method and recording medium
An image forming method includes the steps of a) multi-level quantizing a multi-tone image by an error diffusion method, and b) representing each pixel of the thus-quantized image having a...
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7102787 |
Image reading apparatus
An image reading apparatus comprises a correction coefficient determining circuit 4 for determining a correction coefficient per each bit of white reference data in a main scanning direction...
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7099025 |
Printing system, printing control method and apparatus printing data in accordance with updated condition information
When an engine unit of a printing apparatus issues a calibration request, a controller unit of the printing apparatus stores correction data in a storage unit. Upon printing, a data controller...
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7092127 |
High data rate printer architecture and method of printing using same
A method of printing and the related printer architecture for receiving compressed page data that includes both contone data and foreground bi-level data. Both the contone data and the foreground...
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7088464 |
Image processing device
An image processing device is structured such that it is possible to simply and appropriately determine presence/absence of an image for which overprinting has been designated, or the image. In a...
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7085016 |
Method and apparatus for dithering and inversely dithering in image processing and computer graphics
The invention provides a method and an apparatus for dithering, and inversely dithering an image. The apparatus makes use of a pixel address and a pixel data to locate a dither reference value from...
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7075679 |
Image processing apparatus and method, and printing method and apparatus
An input correction unit divides entered multilevel image data into pixel blocks each comprising a plurality of pixels, refers to conversion tables having conversion data corresponding to pixel...
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7068396 |
Method and apparatus for performing tone scale modifications on a sparsely sampled extended dynamic range digital image
A method of generating a tone scale function for a sparsely sampled extended dynamic range digital image, includes the steps of: providing a sparsely sampled extended dynamic range image sensing...
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7068395 |
Image processing apparatus and method
Multivalued image information is input, subjected to multivalued processing, and converted into data representing the number of print dots for each pixel. Print dots are counted for each region...
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7057772 |
Image processing apparatus for color space conversion and compression of image data, and control method thereof
This invention allows the operator, who does not have any special knowledge, to read an original and perform optimal color space transformation and compression in accordance with the output...
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7054037 |
Method and apparatus for dithering or undithering data words in a data stream
Method and apparatus for dithering and undithering data words in a data stream. The method comprises the steps of processing a data word in a data stream to obtain an output data word by...
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7054031 |
Color reproduction process
A method of color printing is described in which only two transparent inks are used to reproduce a source image The original digitally encoded image in red, green and blue colors may be initially...
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7054030 |
Smooth monotonic tone reproduction curve end point adjustment
The tone reproduction curve is smoothed to eliminate or reduce artifacts due to abrupt changes in the final system tone reproduction curve. As the tone reproduction curve approaches an end point,...
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