Distance Measurement with a General 3D Camera by Using a Modified Phase Only Correlation Method

This paper proposed a new approach of 3D measurement using a home use 3D camera. Stereo image measurement is different from the other active measurement method like using a laser range finder or an ultra-sonic sensor. It is a passive method, which acquire the object as two images, and then calculate the distance information form the two images according to the principle of triangulation. Ordinarily, such of two images is taken by a special use stereo camera which were settled with a precisely accuracy so that to keep a parallel optical axes, depth of focus and so on. But the accuracy settings of a home use 3D camera cannot satisfy such a requirement. In this paper, phase-only-correlation method which can yield sub-pixel accuracy is used, also with some modification and new approach. The simulation shows a good result.