Table creation method, table creation apparatus, storage medium, and program
AssigneeCanon Kabushiki Kaisha
InventorKazuhiro Saito
Life of this patent
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Abstract
A distortion of a table which causes generation of a pseudo contour is removed. For this, there is disclosed a table creation method of creating a table for performing color separation into coloring material colors in an image forming apparatus, comprising the steps of creating a color separation table of a line in which a color reproduction area of the image forming apparatus is maximized, creating a color separation table in an inner line of the color reproduction area of the image forming apparatus, performing an interpolation process based on the created color separation tables, and smoothing the table obtained by the interpolation process to create the table.
Claims28
A table creation method of creating a table for performing color separation into coloring material colors in an image forming apparatus, comprising the steps of:
- creating a color separation table of a line in which a color reproduction area of said image forming apparatus is maximized;
- creating a color separation table in an inner line of the color reproduction area of said image forming apparatus;
- performing an interpolation process based on said created color separation tables;
- and
- smoothing the table obtained by said interpolation process to create the table.
A table creation method of creating a table for performing color separation into coloring material colors in an image forming apparatus, comprising the steps of:
- creating a first color separation table into black from white;
- creating a second color separation table into primary and secondary colors from said white;
- creating a third color separation table into black from said primary and secondary colors;
- performing an interpolation process based on said first, second, and third color separation tables;
- and
- smoothing the table obtained by said interpolation process to create the table.
A table creation method of creating a table for performing color conversion of an input color signal, comprising the steps of:
- using data of a grid point of a color space to perform an interpolation process;
- and
- subjecting said created table to a smoothing process in accordance with a distance from an outer frame of said color space and a distance from a zero boundary without changing a maximum chroma or gray line to create a table.
A storage medium in which a program for creating a table for performing color separation into coloring material colors in an image forming apparatus is stored, the program executing a procedure comprising the steps of:
- creating a color separation table of a line in which a color reproduction area of said image forming apparatus is maximized;
- creating a color separation table in an inner line of the color reproduction area of said image forming apparatus;
- performing an interpolation process based on said created color separation tables;
- and
- smoothing the table obtained by said interpolation process to create the table.
A storage medium in which a program for creating a table for performing color separation into coloring material colors in an image forming apparatus is stored, the program executing a procedure comprising the steps of:
- creating a first color separation table into black from white;
- creating a second color separation table into primary and secondary colors from said white;
- creating a third color separation table into black from said primary and secondary colors;
- performing an interpolation process based on said first, second, and third color separation tables;
- and
- smoothing the table obtained by said interpolation process to create the table.
A storage medium in which a program for creating a table for performing color conversion of an input color signal is stored, the program executing a procedure comprising the steps of:
- using data of a grid point of a color space to perform an interpolation process;
- and
- subjecting said created table to a smoothing process in accordance with a distance from an outer frame of said color space and a distance from a zero boundary without changing a maximum chroma or gray line to create a table.
A program which creates a table for performing color separation into coloring material colors in an image forming apparatus, the program executing a procedure comprising the steps of:
- creating a color separation table of a line in which a color reproduction area of said image forming apparatus is maximized;
- creating a color separation table in an inner line of the color reproduction area of said image forming apparatus;
- performing an interpolation process based on said created color separation tables;
- and
- smoothing the table obtained by said interpolation process to create the table.
A program which creates a table for performing color separation into coloring material colors in an image forming apparatus, the program executing a procedure comprising the steps of:
- creating a first color separation table into black from white;
- creating a second color separation table into primary and secondary colors from said white;
- creating a third color separation table into black from said primary and secondary colors;
- performing an interpolation process based on said first, second, and third color separation tables;
- and
- smoothing the table obtained by said interpolation process to create the table.
A program which creates a table for performing color conversion of an input color signal, the program executing a procedure comprising the steps of:
- using data of a grid point of a color space to perform an interpolation process;
- and
- subjecting said created table to a smoothing process in accordance with a distance from an outer frame of said color space and a distance from a zero boundary without changing a maximum chroma or gray line to create a table.
A table creation apparatus which creates a table for performing color separation into coloring material colors in an image forming apparatus, comprising:
- means for creating a color separation table of a line in which a color reproduction area of said image forming apparatus is maximized;
- means for creating a color separation table in an inner line of the color reproduction area of said image forming apparatus;
- means for performing an interpolation process based on said created color separation tables;
- and
- means for smoothing the table obtained by said interpolation process to create the table.
A table creation apparatus which creates a table for performing color separation into coloring material colors in an image forming apparatus, comprising:
- means for creating a first color separation table into black from white;
- means for creating a second color separation table into primary and secondary colors from said white;
- means for creating a third color separation table into black from said primary and secondary colors;
- means for performing an interpolation process based on said first, second, and third color separation tables;
- and
- means for smoothing the table obtained by said interpolation process to create the table.
A table creation apparatus which creates a table for performing color conversion of an input color signal, comprising:
- means for using data of a grid point of a color space to perform an interpolation process;
- and
- means for subjecting said created table to a smoothing process in accordance with a distance from an outer frame of said color space and a distance from a zero boundary without changing a maximum chroma or gray line to create a table.
Dependencies are inferred from the claim text.