Three-dimensional image measuring apparatus and method

摘要

The present invention provides a three-dimensional image measuring apparatus and method capable of measuring projections and depressions on a surface of an object with fine precision, as well as ensuring stable convergence, even for stereo images with significant project distortion. The apparatus includes an area setting section 56 for setting a reference area 57 in one image 53 of a pair of stereo images 46 and a search area 58 in the other image 54 in a position corresponding to the reference area 57, a search image distortion correcting section 62 for applying an image distortion correction to either one of the one image 53 or the other image 54 according to the positional relationship between the reference area 57 and the search area 58 corresponding to the reference area 57, and an area shape measuring section 66 for measuring a shape of a measuring object 41 photographed in the stereo images 46 based on the reference area 57 in the one image 53 and the search area 58 in the other image 54, either one of which has been corrected by the search image distortion correcting section 62.