| 摘要 |
An image photographing apparatus has a photographing unit for obtaining a plurality of observation images by photographing a same object by a plurality of members having the different optical transfer characteristics, a characteristics calculation unit for calculating optical transfer characteristics according to a distance to the object, and a distance calculation unit for calculating the distance to the object from the plurality of observation images and the optical transfer characteristics. Another type of the apparatus has the photographing unit, a first characteristics calculation unit for calculating first optical transfer characteristics according to a distance to the object, a second characteristics calculation unit for calculating second optical transfer characteristics so as to minimize a blur amount, based on the plurality of observation images and the first optical transfer characteristics, and a blur reconstructing unit for obtaining an in-focus image by reconstructing a blur of an image by using the second optical transfer characteristics.
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