Effect of extracting the center of structured light stripe directly affects the precision and resolutions of 3D coordinate measure. This paper firstly extracted initial centers of the light stripe with the threshold algorithm

secondly

calculated the normal direction at the initial point of the stripe based on image gray grads

finally

accurately gained the energy centers along the normal direction of the stripe. Experiments show that the approach can get full resolution centers

improves the precision of stripe centers

and avoid min density for max curvature surface of the measured object.