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Ogatsu; Hitoshi
Kanagawa, JP
No. of patents:

Patent Number Title Of Patent Date Issued
7675659 Image processing apparatus, table generation apparatus, and image forming system March 9, 2010
An image processing apparatus includes: a composite unit that generates a composite parameter used for implementing a time varying variation correction processing for suppressing color variations associated with lapse of time and a spatial variation correction processing for suppress
7431210 Image forming apparatus, image processing apparatus and method October 7, 2008
An image forming apparatus includes: an image processing section for performing tone correction of an image signal; and an image output section for outputting an image in accordance with an image recording signal output, wherein the image processing section includes: a tone correctio
7307753 Color processing method, color processing device, storage medium, color processing program, and December 11, 2007
Receiving an object color signal and an input black colorant quantity associated with the object color signal, an equivalent output black colorant quantity calculating section calculates an equivalent output black colorant quantity in an output color space equivalent to the input bla
7199900 Color conversion coefficient preparation apparatus, color conversion coefficient preparation met April 3, 2007
An LUT1 preparation section 1 and an LUT2 preparation section 2 prepare an LUT1 and an LUT2 for producing linear output from first raw data or second raw data. Using the LUT1 and LUT2, an LUT1 conversion section 3 and an LUT2 inverse conversion section 4 convert CMYK of the first raw
6128407 Image processing apparatus, image processing method, and image processing system October 3, 2000
An image processing apparatus is disclosed which comprises:means for inputting image data,color distribution recognition means for recognizing a color distribution in a color space and position information in an image space of the image data input through the input means, andmeans for determ
5978107 Method and apparatus for determining color transformation coefficients November 2, 1999
A method of determining lattice point data of a look-up table for transforming input color coordinates into colorant coordinates of a color image output device, or of reconstructing the same by using a differentiable-continuous function. An input-output characteristic of the device i
5724442 Apparatus for processing input color image data to generate output color image data within an ou March 3, 1998
Binary data corresponding to respective lattice point data addresses of a direct look-up table and indicating an inside or outside of a color reproduction range of an output device are retained. Based on the binary data, a judgment is made of whether an input color signal is located
5636290 Color image processing June 3, 1997
A first nonlinear conversion section converts input color signals of a kind that is one of plural, different kinds to L*a*b* signals. A second nonlinear conversion section converts the L*a*b* signals to image recording signals of four colors including black. The first nonlinear conve
5502579 Color image processing method and apparatus capable of adjusting the UCR ratio March 26, 1996
A lightness/chromaticity separation device converts three input color signals to {L*, a*, b*} signals. A chroma determination device determines a chroma signal C* based on the {a*, b*} signals. An UCR ratio calculation device calculates an UCR ratio .alpha. according to a C*-.alpha. func
5331440 Color image processing method and apparatus capable of properly determining black quantity July 19, 1994
Three input color separation signals are converted to three color signals on a uniform color space. A black quantity to be used for full-black reproduction is determined as the maximum black quantity of an output black signal. Then, an actual black quantity of the output black signal is

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