Color conversion method, color conversion system, color conversion program product, printing control method, printing control system, printing control program product, and color conversion table

A color conversion system that establishes for each of lattice points in a predetermined color space the relationship of correspondence between first color image data employed in first image equipment and second color image data employed in second image equipment, and references the established relationships of correspondence so as to convert the first color image data into the second color image data, comprising:

• a characteristic color recognition processor that identifies a characteristic color contained in an image expressed by the received first color image data according to a predetermined criterion;
• a relationship-of-correspondence establishment processor that shifts the positions of lattice points, which fall into the domain in the color space expressing the identified characteristic color, so as to narrow the spacing between adjoining ones of the lattice points, and establishes the relationship of correspondence for each of the shifted lattice points;
• and
• an image data conversion processor that allocates a point of coordinates represented by first color image data to any of lattice points surrounding the point of coordinates according to a predetermined rule, and reads second color image data associated with the allocated lattice point so as to thus achieve conversion.

A color conversion program product that causes a computer to establish for each of lattice points in a predetermined color space the relationship of correspondence between first color image data employed in first image equipment and second color image data employed in second image equipment, and to reference the established relationships of correspondence so as to convert the first color image data into the second color image data, comprising:

• a functional code that identifies a characteristic color contained in an image expressed by the received first color image data according to a predetermined criterion;
• a functional code that shifts the positions of lattice points, which fall into the domain in the color space expressing the identified characteristic color, so as to narrow the spacing between adjoining ones of the lattice points, and establishes the relationship of correspondence for each of the shifted lattice points;
• and
• a functional code that allocates a point of coordinates represented by first color image data to any of lattice points surrounding the point of coordinates according to a predetermined rule, and reads second color image data associated with the allocated lattice point so as to thus achieve conversion.

A printing control method in which the relationship of correspondence between first color image data employed in first image equipment and second color image data employed in second image equipment is established for each of lattice points in a predetermined color space, and the established relationships of correspondence are referenced so as to convert the first color image data into the second color image data, comprising:

• a characteristic color recognition step of identifying a characteristic color contained in an image expressed by the received first color image data according to a predetermined criterion;
• a relationship-of-correspondence establishment step of shifting the positions of lattice points, which fall into the domain in the color space expressing the identified characteristic color, so as to narrow the spacing between adjoining ones of the lattice points, and establishing the relationship of correspondence for each of the shifted lattice points;
• an image data conversion step of allocating a point of coordinates represented by first color image data to any of lattice points surrounding the point of coordinates according to a predetermined rule, and reading second color image data associated with the allocated lattice point so as to thus achieve conversion;
• and
• a printing control step of executing printing according to the second color image data resulting from the conversion.

A printing control system that establishes for each of lattice points in a predetermined color space the relationship of correspondence between first color image data employed in first image equipment and second color image data employed in second image equipment, and references the established relationships of correspondence so as to convert the first color image data into the second color image data, comprising:

• a characteristic color recognition processor that identifies a characteristic color contained in an image expressed by the received first color image data according to a predetermined criterion;
• a relationship-of-correspondence establishment processor that shifts the positions of lattice points, which fall into the domain in the color space expressing the identified characteristic color, so as to narrow the spacing between adjoining ones of the lattice points, and establishes the relationship of correspondence for each of the shifted lattice points;
• an image data conversion processor that allocates a point of coordinates represented by first color image data to any of lattice points surrounding the point of coordinates according to a predetermined rule, and reads second color image data associated with the allocated lattice point so as to thus achieve conversion;
• and
• a printing control processor that executes printing according to the second color image data resulting from the conversion.

A printing control program product that causes a computer to establish for each of lattice points in a predetermined color space the relationship of correspondence between first color image data employed in first image equipment and second color image data employed in second image equipment, and to reference the established relationships of correspondence so as to convert the first color image data into the second color image data, comprising:

• a functional code that identifies a characteristic color contained in an image expressed by the received first color image data according to a predetermined criterion;
• a functional code that shifts the positions of lattice points, which fall into the domain in the color space expressing the identified characteristic color, so as to narrow the spacing between adjoining ones of the lattice points, and establishes the relationship of correspondence for each of the shifted lattice points;
• a functional code that allocates a point of coordinates represented by first color image data to any of lattice points surrounding the point of coordinates according to a predetermined rule, and reads second color image data associated with the allocated lattice point so as to thus achieve conversion;
• and
• a functional code that executes printing according to the second color image data resulting from the conversion.