Color conversion device and method capable of improving color reproduction
AssigneeMinolta Co., Ltd.
InventorHiroyuki Suzuki
Life of this patent
Estimating the term…
Abstract
A color conversion device capable of providing improved color reproduction through a color conversion process in which image data represented in a first color space are input to a three-dimensional LUT to output a plurality of color-converted data, a saturation level of the image data input is determined, a level of contribution of the color-converted data to an interpolation operation is modified based on a result of determination of a saturation level, and the interpolation operation is performed using the plurality of color-converted data having a level of contribution thus modified to obtain output image data represented in a second color space and corresponding to the image data input.
Claims31
A color conversion device comprising:
- a color conversion means for receiving input of image data represented in a first color space to output a plurality of color converted data represented in a second color space;
- an interpolation block for using said color-converted data to perform an interpolation operation to obtain output image data represented in said second color space and corresponding to said image data input;
- a first determination block for determining a saturation level of said image data input;
- and
- a modification block for modifying a level of contribution of said plurality of color-converted data to said interpolation operation, based on a determination result of said first determination block.
A color conversion method comprising the steps of:
- (1) obtaining, based on image data input represented in a first color space, a plurality of color-converted data corresponding to said image data input and represented in a second color space;
- (2) determining a saturation level of said image data input;
- (3) modifying, based on a result of step (2), a level of contribution of said plurality of color-converted data to an interpolation operation;
- and
- (4) using said color-converted data having a modified level of contribution, to perform said interpolation to obtain image data output represented in said second color space and corresponding to said image data input represented in said first color space.
A program converting image data represented in a first color space to image data represented in a second color space, said program causing a computer to execute a process comprising the steps of:
- (1) obtaining, based on image data input represented in a first color-space, a plurality of color-converted data corresponding to said image data input and represented in a second color space;
- (2) determining a saturation level of said image data input;
- (3) modifying, based on a result of step (2), a level of contribution of said plurality of color-converted data to an interpolation operation;
- and
- (4) using said color-converted data having a modified level of contribution, to perform said interpolation to obtain image data output represented in said second color space and corresponding to said image data input represented in said first color space.
A color conversion device comprising:
- a three-dimensional lookup table having color-converted data stored therein a form of data corresponding each lattice point of a three-dimensional lattice dividing a first color space, and represented in a second color space, said three-dimensional lookup table receiving input of image data represented in said first color space to output a plurality of color-converted data corresponding to each lattice point of a cube containing said image data input;
- a first determination block for determining a saturation level of said image data input;
- a selector for selecting a predetermined interpolation coefficient based on a determination result of said first determination block;
- and
- an interoperation block for using said interpolation coefficient selected by said selector and said plurality of color-converted data output from said three-dimensional lookup table, to perform an interpolation operation to obtain output image data represented in said second color space and corresponding to said image data input.
Dependencies are inferred from the claim text.