Patent ID: 8379106
Filing Date: 2013-02-19
Classification: G06T,H04N

Abstract:
1. An image processing device that reproduces under a second observation condition an appearance of a color of a subject as perceived under a first observation condition, comprising: an image data acquisition unit that obtains first image data created by capturing a subject image under the first observation condition; a first illumination condition acquisition unit that obtains information related to a first illuminating light source used under the first observation condition; a second illumination condition acquisition unit that obtains information related to a second illuminating light source used under the second observation condition; a characteristic quantity calculation unit that calculates a characteristic quantity related to a state of visual perception adaptation under an observation condition that is at least one observation condition of the first observation condition and the second observation condition, by taking into consideration information related to an illuminating light source used under another observation condition in addition to information related to an illuminating light source used under the one observation condition; and a color conversion unit that executes color conversion to convert the first image data to second image data to be used to reproduce, under the second observation condition, the appearance of the color of the subject as perceived under the first observation condition, based upon the characteristic quantity having been calculated, wherein: the characteristic quantity is an adapted white point; the characteristic quantity calculation unit is an adapted white point calculation unit that calculates a white point in case that visual perception is adapted under an observation condition that is at least one of the first observation condition and the second observation condition by taking into consideration the information related to the illuminating light source used under the other observation condition in addition to the information related to the illuminating light source used under the one observation condition; the adapted white point calculation unit calculates as the adapted white point at least a first adapted white point in case that visual perception is adapted under the first observation condition by taking into consideration the information related to the second illuminating light source having been obtained in addition to the information related to the first illuminating light source having been obtained; and the color conversion unit executes color conversion to convert the first image data to the second image data based upon the first adapted white point thus calculated.