Apparatus and method for calculating color temperature

An apparatus for calculating a color temperature, comprising:

• a chroma selecting portion for selecting a left and a right chroma that are most adjacent to a one-dimensional chroma inputted from a mapping table, the table mapping a chroma to a color temperature;
• a distance calculating portion for calculating distances between the selected left chroma and the inputted one-dimensional chroma, and between the selected right chroma and the inputted one-dimensional chroma, respectively;
• and
• a color temperature calculating portion for calculating a color temperature corresponding to the one-dimensional chroma inputted in accordance with a ratio of the calculated distances.

A color display system, comprising:

• a table mapping a chroma to a color temperature;
• a chroma detecting portion for detecting the chroma from inputted image data and outputting the detected chroma at a one-dimensional level;
• a color temperature selecting portion for selecting from the table left and right color temperature/chroma that are most adjacent to the one-dimensional chroma;
• a distance calculating portion for calculating distances between the selected left color temperature/chroma and the one-dimensional chroma, and between the selected right color temperature/chroma and the one-dimensional chroma;
• a color temperature calculating portion for calculating a color temperature corresponding to the one-dimensional chroma in accordance with a ratio of the calculated distances;
• a color temperature converting portion for converting the chroma of the inputted image data into the calculated color temperature;
• and
• a display portion for displaying an image having the converted color temperature.

A method for calculating a color temperature, comprising the steps of:

• a) inputting one-dimensional chroma;
• b) selecting left and right color temperatures that are most adjacent to the one-dimensional chroma inputted from a chroma-color temperature mapping table;
• c) calculating distances between the selected left color temperature and the inputted one-dimensional chroma, and between the selected right color temperature and the inputted one-dimensional chroma;
• and
• d) calculating a color temperature corresponding to the one-dimensional chroma inputted in accordance with a ratio of the calculated distances.