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5589950 |
Image forming apparatus that corrects input gray level-output gray level characteristic data such that output gray levels gradually increase with higher input gray levels near a boundary
In an image forming apparatus according to the present invention, characteristic correcting data for correcting input gray level-output gray level characteristics for each of a plurality of steps...
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5583666 |
Method for cross-device color calibration and enhancement using explicit constraints
This invention provides a method for transforming an input color space to an output color space where each of a plurality of specified colors and/or color regions are constrained to be transformed...
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5581376 |
System for correcting color images using tetrahedral interpolation over a hexagonal lattice
Input device signals R s , G s , B s generated by an image input terminal are converted to colorimetric values R c , G c , B c . The colorimetric values processed by an image processing unit to...
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5579418 |
Image interpolation apparatus
Method and apparatus for providing interpolated image data from original image data represented in terms of pixels, each pixel defined in terms of value and position in an original image, includes...
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5570436 |
Method for interpolating missing pixels and an apparatus employing the method
The present invention discloses a missing pixels interpolating method and an apparatus using the method. The method forms a second image from a first image by interpolating a plurality of pixels...
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5552905 |
Image processing apparatus which selects a type of color processing for color image data based on a characteristic of the color image data
This invention has as its object to provide an image recording apparatus, which can omit a color processing calculation process for designated colors of an image when color processing results for...
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5537230 |
Signal processing device for video printer
A signal processing device for a video printer which is capable of eliminating white stripes attributed to the block division type drive of a thermal head. The signal processing device also...
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5528274 |
Method of printing full-color frame image reproduced from full-color field image by interpolation
A color video thermal printing method for printing a full-color frame image on the basis of a color video signal of a full-color field image by interpolation. Interpolation for at least one of...
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5519515 |
Method of determining color signals for input signals at vertices in input color space
A color signal determining method comprises steps of: dividing a three-dimensional input color space into a plurality of unit solid figures, each of the solid figures having a set of vertices;...
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5495350 |
Color image processor which corrects spatial and frequency characteristics of color components
An image reading apparatus which can eliminate a difference of the MTF occurring due to the matching of the positions of the pixels and can perform an accurate color discrimination and can obtain a...
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5479272 |
Color gradation correction system of combination of looking-up table and interpolation and method thereof
A color correction system and method for correcting three kinds of color gradation input data, each having an m bit length, to produce three kinds of corrected color gradation data, each having an...
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5475510 |
Method for transforming color signals and apparatus for the method
Method and apparatus for transforming color signals in order to reproduce a tone on an original document faithfully, and an apparatus for executing the method. The color signals transforming method...
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5471324 |
Color printer calibration with improved color mapping linearity
In a color printer calibration process, a color printer is driven with a set of printer signals selected to print a set of color samples throughout a printer gamut. A color measuring device...
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5442718 |
Apparatus and method for storing and reproducing digital image data yielding high resolution and high quality video image data
An apparatus for processing image data. The apparatus converts analog green image data signals, analog red image data signals, and analog blue image data signals generated by imaging an object. The...
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5428465 |
Method and apparatus for color conversion
The present invention relates to a method and apparatus applied to a widely-used and high-speed color conversion which is utilized in a color printer, a color display apparatus and the like, and...
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5412491 |
Apparatus and method for color transformation
Color transformation apparatus for transforming an input color space into an output color space and including a first LUT for transforming a first portion of the input color space into a...
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5400154 |
Hybrid interpolation and non-interpolation method and apparatus for image enlarging and contracting
Image data is processed to enlarge and contract an original image, represented by the data, by P times in an X-axis direction while the data is subjected to interpolation. The letter P denotes an...
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5390035 |
Method and means for tetrahedron/octahedron packing and tetrahedron extraction for function approximation
The invention concerns the conversion of an input color to an output color using a multi-variable function having an input domain in a first three-dimensional color space and output range in a...
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5384648 |
Apparatus and method for descreening
Apparatus and method for descreening and for performing resolution changes and correction of misregistration on a color half-tone image in order to produce a color continuous tone image. The...
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5323250 |
Pixel-skipping apparatus in an image processor
An image processing apparatus functions to convert a first image derived as color-pixel data into a second image generated by a lesser number of corresponding data through a pixel-skipping process....
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5313278 |
System for proofing
A system for proofing which includes color scanning apparatus for scanning an input image and for producing a plurality of color separation signals corresponding to color values in the input image,...
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5307182 |
Methods and apparatus for multigeneration color image processing
An image processing apparatus and method for performing the steps of grouping colors of a multi-pixel image stored in a memory into sets of colors, determining the average color of each set of...
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5278678 |
Color table display for interpolated color and anti-aliasing
A scheme for the color display of images on a device with a moderate sized color table first builds halftoned binary images for each of the three color components at a multiple of the display...
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4992861 |
Color image reproduction apparatus having a digitally operated look-up table constructed by means of a least squares algorithm
Color image reproduction apparatus, including a video monitor and a computer-based workstation, provides for modifying an original color image read from an input film and for writing a reproduced...
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4901258 |
Method of and apparatus for generating look-up table data
Basic data obtained by thinning-out data to be written in a look-up table are previously operated by a computer and stored in a basic memory table. Coefficient data required for linearly...
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4796085 |
Device for interpolating missing color-difference signal by averaging line-sequential color-difference signals
An apparatus interpolates color-difference line-sequential signals appearing alternately in a video signal together with a luminance signal. The video signal is received by an input circuit and...
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4780756 |
Apparatus for producing a hard copy of a color picture from either a field or a frame of luminance and line-sequential color difference video signals
A hard copy of a picture is produced from a single field of video signals representing the picture. A single field of luminance and line-sequential color difference video signals representing a...
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4734759 |
A video printer having color signal interpolation circuit
A video printer having color signal interpolation circuit including a first memory which stores a color signal requiring the largest amount of information among signal of three primary colors in a...
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4712141 |
Method and apparatus for interpolating image signals
Image signals inputted from an input device are subjected to A-D conversion through an A-D converter to be stored in memory by at least an adjacent pair of pixels. The pair of pixels are...
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4692796 |
Method for manufacturing electric masks using a color scanner and an apparatus for use therein
A method for manufacturing electric masks characterized by a step of setting a cutout area of the original picture adhered to an input drum by using a color scanner comprising CRT monitor and...
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4672433 |
Color signal processing apparatus with a signal interpolation function for use in a color copier
In a color picture reproducing apparatus, a color light receiving element array has light receiving element which are arrayed in one line and have color separation filters. At least three light...
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4639770 |
Method and circuit arrangement for simulating a multi-colored reproduction on a color monitor
A method and apparatus for isochromatic simulation of a multi-colored reproduction on a color monitor. Before simulation, colors are generated on the color monitor and are matched to corner colors...
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4511989 |
Linear interpolating method and color conversion apparatus using this method
A linear interpolating method and apparatus for signals in a memory wherein first signals are converted into second signals by addressing in at least four-dimensional fashion, for use in a color...
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4477833 |
Method of color conversion with improved interpolation
An apparatus for converting a color image from one color space to another color space includes a memory in which is stored a finite number of output signals which represent colors in the output...
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4468693 |
Video printing apparatus
A video printing apparatus for forming color separation films and a color film recording an image of a video signal of a desired frame is disclosed. The video signal is once recorded on a 1" video...
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4346402 |
Image-reproduction apparatus
A color scanner for the graphic arts of the kind in which three uncorrected color-component analogue signals from the scanner are converted into digital form and are applied to the inputs of a...
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4334240 |
Interpolation methods and apparatus
The invention relates to methods and apparatus for interpolating between coarse stored data to achieve a more accurate answer, and is particularly applicable to color scanning reprographic...
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4314274 |
Digital color correction method
A method for carrying out a color correction in a digital manner in a picture reproducing machine such as a color scanner, a color facsimile, or the like, which is capable of saving a large volume...
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4275413 |
Linear interpolator for color correction
A linear interpolating method and apparatus for color signals in a memory of a picture reproducing machine, wherein the stored signals are addressed in a three-dimensional fashion and a cubic...
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4270141 |
Method and machine for reproducing a color picture by storing signal streams, one entirely, and the rest partially
A method and machine for reproducing a picture are disclosed, in which a color original picture is scanned and the analog original picture signal thereby produced is broken into n separation...
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3893166 |
Colour correcting image reproducing methods and apparatus
In the reproduction of a coloured original using a photo-electric scanner to derive colour component signals, corrected output values of the colour component signals are obtained from a store which...
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