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7031021 |
Randomized superpixels to enhance multilevel image quality in economical, fast incremental-printing error diffusion
While powerful in diffusion at one resolution to print photos at a finer resolution, the invention is not thus limited. It defines superpixels (“spels”) for each desired colorimetric level,...
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7027088 |
Color to monotone conversion apparatus, color to monotone conversion method and a medium recording thereon a color to monotone conversion program
The present invention is directed to a monotone conversion apparatus that it is provided with a picture acquisition unit for expressing a picture in picture elements in a dot matrix form and...
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7025515 |
Bit mask generation system
A printing system is disclosed where a multi level pixel image ( 200 ) is converted into a half tone image ( 300 ) utilising a set of bit mask arrays ( 350 - 0 to 350 - 255 ) stored within a...
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7020333 |
Apparatus and method for equalizing histogram of an image
An apparatus and method are provided to equalize a histogram using a cumulative distribution function (CDF) of an image. A model parameter estimator estimates parameters from the image using a...
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7016078 |
Image-forming apparatus and method for evaluating gradation characteristic
An image-forming apparatus processes image signals based on a predetermined gradation-converting curve. The predetermined gradation-converting curve includes at least one of: a first gradation in...
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7012717 |
Multi-level dither screening on a split arithmetic logic unit processor
This invention is a method of multilevel dither screening in a printer. Plural pixel values are packed into equal sections of a first data word. Corresponding dither values are packed into the...
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7003241 |
Image recording device and an image recording system
A multi-beam image recording device is capable of recording high-quality high-resolution images without positional errors by exposing test patterns for measuring positional errors of beam spots of...
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6985627 |
LED bar array high addressable imaging in 2-dimensions
An imaging apparatus includes an input that receives a stream of image pixels such as high addressable bits, multiple bits per pixel or binary image bits representing an input image and a processor...
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6977756 |
Error diffusion processing device
A data driven type processing device has an error diffusion computing unit built therein. An error holding register is provided within the error diffusion computing unit, and is used to...
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6975431 |
Image processing method and image processing apparatus
There are disclosed an image processing method of performing a process for converting image data representative of pixel values of a plurality of pixels constituting an image into image data...
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6956673 |
Image processing apparatus and method to reduce gray levels of image
An image processing apparatus capable of providing an output image which is close to an actual image observed with human eyes is structured in the following way. An image data from an input unit is...
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6950209 |
Generating knockout marks for objects
A host-based method for identifying an area within a color layer of a page that is not to be painted when producing a final output page. The method includes identifying an object that is to be...
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6940619 |
Polynomial based multi-level screening
This invention is a computer implemented method of approximating a gray scale tone with a more limited range image producer. One of a plurality of tone curves is associated with each pixel of a...
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6924910 |
Image forming apparatus and image forming method
The image forming apparatus and image forming method according to the present invention have an object of outputting a latent image formed on an intermediate recording medium as a stable image when...
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6921144 |
Drop firing control in multicolor ink jet printheads
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...
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6894796 |
Method, system, and logic for selecting line work and control data for a pixel from multiple objects of line work data provided for the pixel
Disclosed is a method, system, and logic for processing pixel data. A first and second logic units each receive line work data and control data for pixels on a sheet from at least one object. The...
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6880906 |
Color mixing
A method for determining percentages of colors needed to obtain a mixed color is described. The method includes: determining a difference between an expected function and a measured function of a...
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6873437 |
Image processing method and image processing apparatus
An image processing method and image processing apparatus in which the densities around the object pixel are integrated and re-allocated. Level division means divides an original image belonging to...
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6863360 |
Method for adjusting dot-gain for a halftone binary bitmap
A method for adjusting dot-gain for a halftone binary bitmap file, a method for adjusting the dot-gain for a halftone binary print, and a method for adjusting the dot-gain for a printing plate,...
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6856426 |
Solid state scanning type optical recording device
An 8-bit (256 gradient) image is represented using a driver IC of 6-bit (64 gradient) construction to drive a plurality of arrayed optical shutter elements. The image data are divided into 64...
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6850338 |
Method, system, program, and data structure for generating raster objects
Disclosed is a method, system, program, and data structure for generating raster objects. A plurality of input contone and line work objects are received containing contone or line work data for at...
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6819450 |
Enhanced edge resolution and critical dimension linearity in lithography
A semiconductor fabrication gray level photolithography strategy, in which the energy beam intensities corresponding to each gray level are selected from a set of non-linear, non-monotonic...
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6804029 |
Liquid crystal shutter
Disclosed is a liquid crystal shutter that uses as a shutter a liquid crystal panel constructed by sandwiching DHF liquid crystal between a pair of substrates provided with one or more pixel...
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6804028 |
Image processing apparatus and method, and storage medium storing computer-readable program
In order to efficiently output image data having superior image quality in comparison with that of an image development process dependent on a single development process resource, PDL data based on...
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6798541 |
Systems and methods for generating binary clustered, irrational halftone dots
The result of integrating a halftone dot-shape can be clustered. When the edge of the halftone dot-shape extends across a “vertical” edge of a window, the window is altered until the edge of...
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6778298 |
Image forming apparatus
There is provided an image forming apparatus that enables the formation of high-quality multi-level images by ensuring that the size of blocks into which the image is to be divided is specified in...
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6768558 |
Printed matter including invisible information and printing system
To invisibly embed additional information in a base pattern and to visualize the additional information, a dislocation is provided in a boundary between the base pattern compose of striped thin...
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6765693 |
Photo quality color printing by using light black ink
A method for printing images using light black ink. The method sets a first and second threshold determined by an intensity value of the light black ink relative to standard black ink. The method...
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6760125 |
Image processing method and device
A printer block is capable of outputting synthesized images such that the synthesized images are recognizable, each of the synthesized images being synthesized from image elements. A display is...
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6750994 |
Exposure control device of image reading device
The exposure control device has a line sensor sensing image data corresponding to a color image recorded in a negative film. The line sensor is exposed using first, second and third exposure times...
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6747756 |
Color printing apparatus
There is provided a color printing apparatus capable of easily and rapidly setting the color for each of edited items relating to color without lowering the degree of freedom of setting even if...
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6734990 |
Image formation apparatus and image formation method
Discloses an image formation apparatus capable of achieving a picture quality improvement of a multi-value image without increasing the size of a look-up table to a size larger than the size of a...
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6728426 |
Compression of form images in gray-level
A method for compressing an electronic image of an object including gray-level information includes processing the gray-level information to identify a kernel of pixels in the image having...
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6721802 |
Method, apparatus and program for the central storage of standardized image data
A system is disclosed whereby a user can upload image data into a central image database on a central server, using the processing power of a remote terminal computer to re-sample and resize each...
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6714318 |
Dithering method and apparatus for multitone printers
Digital halftoning techniques in printers which construct and utilize a mask in a dithering algorithm for a multitone printer are generalized by using a decision matrix in conjunction with a...
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6714322 |
Image processing apparatus, image processing method, and storage medium therefor
ROM stores an 8×8 base matrix of 64 sequential threshold values (1-64), hexadecimal data for a specified pattern to be rendered on an output image, and a threshold address table in which the...
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6690491 |
Image processing apparatus for overlapping bit map data and vector data
In case the bit map portion data stored in a bit map portion data storage unit is overlapped with the vector portion data stored in a vector portion data storage unit, the image processing...
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6674547 |
Image processing apparatus for performing image formation using signals obtained by pulse-width modulating an image signal by a plurality of modulating methods
There is provided an image processing apparatus having an input unit for inputting an image signal, a generation unit for generating a modulation mode signal in accordance with a designation made...
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6614557 |
Method for degrading grayscale images using error-diffusion based approaches
An image transformation method to reduce the number of the gray levels is disclosed. Error diffusion, error bias and a programmable integer C are utilized. For the focus pixel, the value G i of...
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6557964 |
Printing apparatus and method
The present invention provides a printing apparatus and method that can prevent the image grade from lowering. A print head is provided with a plurality of printing elements to print dots on N...
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6530637 |
Gradation reproduction method and gradation-reproduced image
The gradation reproduction method is capable of smooth gradation depiction without making graininess of an image conspicuous when gradation levels for reproducing the image are reproduced by dot...
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6525838 |
Color image processing apparatus and recording medium
An object is to provide a print proof that takes account of halftone dots and operating conditions of a printing press. To achieve the object, a color image processing apparatus for producing the...
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6473521 |
Image processing device and image processing method and storage medium
Color data, originally corresponding to different colors, are converted to the same density when gray-scale conversion is performed, and no boundary is distinguished. When performing the gray-scale...
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6466225 |
Method of halftoning an image on a video display having limited characteristics
A method of halftoning input image data intended for reproduction on a display ( 114 ) having a plurality of pixels ( 23-27 ) and a limited pixel response time (see FIG. 1 ) is disclosed. In a...
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6462837 |
Gray-scale conversion based on SIMD processor
An image processing device for performing gray-scale conversion includes a plurality of processing elements which include respective registers and perform the gray-scale conversion in parallel with...
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6462836 |
Double-tone printer and method of making density correction curve for double-tone printing
A double-tone printer includes an image scanner which inputs an image signal representing an original. The image signal is converted into a density signal according to a density correction curve...
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6437872 |
Multibit screening of print documents in a PDL environment
A high addressable multibit screening device and method for use in a PDL interpreter environment achieve improved printing resolution and quality. A PDL interpreter receives a PDL document from a...
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6437879 |
Interpolation of greyscale levels
In a method of colour printing using arrays of threshold value for interpolating between grey levels, the threshold values for each of the colours are provided by defining rows of threshold values,...
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6414757 |
Document security system and method
A system and method for secured image creation. A bitmap image is processed to separate color or greyscale planes, or is used as a greyscale, single plane image. The plane(s) are each converted...
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6404512 |
Method and apparatus for image processing capable of efficiently performing a gamma conversion operation
An image processing method and apparatus including a memory, parameter registers, and a gamma conversion processor. The memory stores at least one gamma conversion algorithm and a plurality of...
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