1. A three-dimensional coordinate measuring apparatus comprising: an imaging optical system for projecting a beam in a direction generally parallel to a yaw axis of an object to form an image of the object; a first incident angle adjusting section for adjusting an attitude of the object in a direction of a first neutral axis to adjust an incident angle of the beam relative to the object so that a first stereoscopic image of the object can be formed; a first image detecting section for receiving the first stereoscopic image of the object formed by the imaging optical system with the incident angle adjusted by the first incident angle adjusting section; a second incident angle adjusting section for adjusting the attitude of the object in a direction of a second neutral axis including an in-plane tilt axis to adjust the incident angle of the beam relative to the object so that a second stereoscopic image of the object can be formed; a second image detecting section for receiving the second stereoscopic image of the object formed by the imaging optical system with the incident angle adjusted by the second incident angle adjusting section; a matching process section for searching for corresponding points corresponding to measurement points in a first search direction generally perpendicular to the first neutral axis in the first stereoscopic image and searching for corresponding points corresponding to measurement points in a second search direction generally perpendicular to the second neutral axis in the second stereoscopic image; and a shape measuring section for obtaining three-dimensional coordinate data of the object based on relation between the measurement points and the corresponding points in the first and second stereoscopic images.