Patent ID: 8520097

Claim:
An image processing device comprising: a color-gamut determining part for determining a color gamut as a range of color distribution from input image data input from an input part; a color-space determining part for determining a color space substantially containing the color gamut determined by said color-gamut determining part; and a color-space conversion part for converting the input image data into image data which is rendered in the determined color space and for transmitting a converted image data and information on the color space determined by said color-space determining part as information corresponding to the converted image data, wherein: said color-gamut determining part divides the input image data into a plurality of image regions and calculates a hue and a chroma for each of the image regions to determine a maximum chroma for each of the hues calculated via a chromaticity diagram; said color-space determining part selects a smallest color space from color spaces each having a maximum chroma equal to or higher than that of the input image data in all of the hues calculated by said color-gamut determining part; and said color-space determining part selects a smallest color space from color spaces each containing a color gamut of a subject at or over a predetermined area ratio on said chromaticity diagram when there is no space containing the color gamut of the subject.