Patent attributes
An image transform apparatus includes: a resolution device performing wavelet resolution based on an image representing distribution of psycho-physical color to generate sub band images at one resolution level or more; a transform device transforming values of pixels of the sub band images from values of the psycho-physical color to values of perceived color based on a predetermined relation between the psycho-physical color and the perceived color; and a synthesis device performing wavelet synthesis based on the sub band images at one resolution level or more resulting from the transform by the transform device, to generate an image representing distribution of the perceived color, thereby correlating a color system of psycho-physical color (for example, the XYZ color system) and a color system of perceived color (for example, the L*a*b* color system) to each other without setting standard light.
