Fast method of 3D surface reconstruction based on single gray image

Fast method of 3D surface reconstruction is purposed for the problem of surface that contains shadow. The data from shape from shading and rotational symmetric triangulation sensor based on single gray image are be integrated. Purposed for the problem of ensure two meanings of the data of shape from shading, the key data from rotational symmetric triangulation sensor are be used. Purposed for the problem that the rotational symmetric triangulation has to measure the surface point by point and the low measurement speed, the corrected data from Shape from shading are be used to guide the rotational symmetric triangulation sensor to measure the points of the surface that contains shadow which have great gradient and the feature points precisely. A system integrates data of shape from shading and data of rotational symmetric triangulation sensor is built. The accuracy of measurement of this system will be changed by the gradient of the surface. Therefor the surface that contains shadow can be reconstructed fast and precisely. Experiments results show that the method is with higher accuracy and robust. © 2014 Journal of Mechanical Engineering.