| 摘要 |
PROBLEM TO BE SOLVED: To easily obtain spectral distribution information of an illumination light source to a subject having known reflectance without having to photograph the subject or to measure a spectral distribution of illumination. SOLUTION: An image difference computation part 111 computes image differences between image data obtained by photographing the subject 12 under a stroboscopic light source 13 by an imaging part 10 for multiband photographing and image data obtained by photographing it under the illumination light source 14. A spectral distribution difference computation part 113 computes a spectral distribution difference, the difference with spectral distribution information of the stroboscopic light source 13 set by a stroboscopic setting part 116 on various types of spectral distribution information held in a spectral distribution holding database 112. A difference comparison part 114 selects a spectral distribution difference having a highest degree of matching with the image differences. A spectral distribution estimation part 115 estimates spectral distribution information corresponding to the selected spectral distribution difference as spectral distribution information to the illumination light source 14. COPYRIGHT: (C)2011,JPO&INPIT
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