DEPTH MAP ACQUISITION DEVICE AND DEPTH MAP ACQUISITION METHOD

摘要

The present invention relates to a depth information acquisition apparatus which acquires depth information using a plurality of image information depending on a plurality of views, comprising: a feature point and corresponding point extracting unit for extracting a plurality of feature points from reference image information, and extracting a plurality of corresponding points corresponding to the feature points from each non-reference image information; and a camera parameter acquiring unit including a undistorted feature point and undistorted corresponding point acquiring unit and an estimated undistorted corresponding point acquiring unit. The undistorted feature point and undistorted corresponding point acquiring unit separately maps the feature points and the corresponding points to an undistorted image coordinate system from a distorted image coordinate system so as to acquire the undistorted feature points and the undistorted corresponding points. The estimated undistorted corresponding point acquiring unit acquires an estimated three-dimensional coordinate of the undistorted feature points, projects the estimated three-dimensional coordinate onto each of the non-reference image information, and acquires the estimated undistorted corresponding points. The camera parameter acquiring unit acquires a camera parameter minimizing a difference between the undistorted corresponding points and the estimated undistorted corresponding points.