Abstract
The single 2D image is taken as the research object and this paper applied the basic theory of SFS,firstly estimated the tilt and the slant of illumination,calculated every point of the surface gradient of the object in illumination coordinate,secondly rotated the coordinate system,getting the every point of the surface gradient of the object in observing coordinate,finally used three point Simpson formula,getting the height of the object.The entire process is simple and clear and the results of simulation showed the efficiency of the new approach.
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