Patent ID: 8326020
Filing Date: 2012-12-04
Classification: G01B

Abstract:
1. A method of measuring a three-dimensional depth by projecting a light pattern to a target object using one or more projection apparatus and obtaining the light pattern using one or more image photographing apparatus, the method comprising: projecting different light patterns with the projection apparatus sequentially in time wherein the light patterns are rotated and projected such that a vertical axis or a horizontal axis of the light patterns to be projected is parallel to the epipolar line between the projecting apparatus and an image photographing apparatus corresponding to the light patterns to be projected; detecting corresponding points of light on projecting surfaces of the projection apparatus which correspond to the points of the light introduced into one or more image photographing apparatus; performing rectification on the images of the projecting apparatus and the image photographing apparatus such that axes of the light patterns projected from the projecting apparatus is horizontal or vertical; and detecting errors of the corresponding points between three of the apparatus by determining whether the corresponding points deviate from a horizontal line or a vertical line and checking the corresponding points.