Apparatus and method of transforming three color signals into multi-color signal

A method of transforming a color signal having three color components into a color signal having more than three color components, represented by first through n-th color components, the method comprising:

• producing a lookup table having signal values of (n-3) of n color components of a color at a boundary of a three-dimensional color space and reference variables corresponding to the signal values of the (n-3) color components;
• extracting the reference variables from an input color signal;
• determining the signal values of the (n-3) color components corresponding to the extracted reference variables from the lookup table;
• and
• producing a color signal having n color components using the determined signal values of the (n-3) color components based on a removal of determined respective color component information from the input color signal.

An apparatus for transforming a color signal having three color components into a color signal having more than three color components, represented by first through n-th color components, the apparatus comprising:

• a look up table LUT production unit producing a lookup table having signal values of (n-3) of n color components of a color within a three-dimensional color space and reference variables corresponding to the signal values of the (n-3) color components;
• a reference variable extraction unit extracting the reference variables from an input color signal having three color components;
• an LUT referring unit receiving the extracted reference variables and determining the signal values of the (n-3) color components corresponding to the extracted reference variables from the lookup table;
• and
• a color signal production unit producing a color signal composed of n color components using the determined signal values of the (n-3) color components based on a removal of determined respective color component information from the input color signal.

An apparatus for transforming a color signal having three color components into a color signal having more than three color components, represented by first through n-th color components, the apparatus comprising:

• a look up table LUT production unit producing a lookup table having signal values of (n-3) of n color components of a color at a boundary of a three-dimensional color space and reference variables corresponding to the signal values of the (n-3) color components;
• a reference variable extraction unit extracting the reference variables from an input color signal having three color components;
• an LUT referring unit receiving the extracted reference variables and determining the signal values of the (n-3) color components corresponding to the extracted reference variables from the lookup table;
• and
• a color signal production unit producing a color signal having n color components using the determined signal values of the (n-3) color components based on a removal of determined respective color component information from the input color signal.

A computer-readable storage medium encoded with processing instructions for causing a processor to perform a method of transforming a color signal having three color components into a color signal having more than three color components, represented by first through n-th color components, the method comprising:

• producing a lookup table having signal values of (n-3) of n color components of a color within a three-dimensional color space and reference variables corresponding to the signal values of the (n-3) color components;
• extracting the reference variables from an input color signal;
• determining the signal values of the (n-3) color components corresponding to the extracted reference variables from the lookup table;
• and
• producing a color signal having n color components using the determined signal values of the (n-3) color components based on a removal of determined respective color component information from the input color signal.

A computer-readable storage medium encoded with processing instructions for causing a processor to perform a method of transforming a color signal having three color components into a color signal having more than three color components, represented by first through n-th color components, the method comprising:

• producing a lookup table having signal values of (n-3) of n color components of a color at a boundary of a three-dimensional color space and reference variables corresponding to the signal values of the (n-3) color components;
• extracting the reference variables from an input color signal;
• determining the signal values of the (n-3) color components corresponding to the extracted reference variables from the lookup table;
• and
• producing a color signal having n color components using the determined signal values of the (n-3) color components based on a removal of determined respective color component information from the input color signal.

An apparatus for transforming an input color signal having three color components into a color signal having more than three color components, represented by first through n-th color components, comprising:

• a look up table (LUT) production unit producing a lookup table having signal values of a specified number of n color components of a color within a three-dimensional color space and reference variables corresponding to the signal values of the specified number of color components;
• a LUT referring unit receiving extracted reference variables from the input color signal and determining the signal values of the specified number of color components corresponding to the extracted reference variables;
• and
• a color signal production unit producing a color signal having n color components based on a color signal using the determined signal values of the specified number of color components, a comparison of the determined signal values of the specified number of color components and the input color signal, and another color signal representing a different conversion of the input color signal based on a result of the comparison.

An apparatus for transforming an input color signal having three color components into a color signal having more than three color components, represented by first through n-th color components, comprising:

• a look up table (LUT) production unit producing a lookup table having signal values of a specified number of n color components of a color within a three-dimensional color space and reference variables corresponding to the signal values of the specified number of color components;
• a LUT referring unit receiving extracted reference variables from the input color signal and determining the signal values of the specified number of color components corresponding to the extracted reference variables;
• and
• a color signal production unit producing a color signal having n color components based on a color signal using the determined signal values of the specified number of color components and another color signal representing a different conversion of the input color signal using the specified number of color components,
• wherein the three-dimensional color space is a linearized LAB (LLAB) space, signals L, A, and B are produced from transformed Y and C signal values, and the color signal of the three-dimensional color space is calculable by the following equation
• LLAB
• cy
• =
• [
• p
• c
• p
• y
• q
• c
• q
• y
• r
• c
• r
• y
• ]
• ×
• [
• transformed
• ⁢
• ⁢
• value
• c
• transformed
• ⁢
• ⁢
• value
• y
• ]
• ,
• and wherein coefficients pc, py, qc, qy, rc and ry are determined according to characteristics of color components determined from the lookup table.

An apparatus for transforming an input color signal having three color components into a color signal having more than three color components, represented by first through n-th color components, comprising:

• a look up table LUT production unit producing a lookup table having signal values of a specified number of n color components of a color at a boundary of a three-dimensional color space and reference variables corresponding to the signal values of the specified number of color components;
• an LUT referring unit receiving the extracted reference variables from the input color signal and determining the signal values of the specified number of color components corresponding to the extracted reference variables from the lookup table;
• and
• a color signal production unit producing a color signal having n color components based on a color signal using the determined signal values of the specified number of color components, a comparison of the determined signal values of the specified number of color components and the input color signal, and another color signal representing a different conversion of the input color signal based on a result of the comparison.