| 摘要 |
Pattern lights A and B of which patterns respectively having bright and dark sections have been in an inverted relation are projected on a subject to calculate luminance distributions L1 and L2 of the subject and average values Ave(L1) and Ave(L2) of the distributions. A luminance distribution obtained by multiplying a luminance distribution L0 of the subject of only a natural light component by a coefficient eta is subtracted from the luminance distribution L2 obtained by projecting the pattern light B on the subject and a correction value L2' thereof is calculated so that a difference e of the average values become zero. Then, an intersection point of the luminance distribution L1 obtained by projecting the pattern light A on the subject and the correction value L2' of the luminance distribution L2 obtained by projecting the pattern light B on the subject is derived. |
