For the three-dimensional measurement method of projection structure light, the three-dimensional measurement of the objects with specular surface can’t get a clear coded image because of the specular reflection. It affects the calculation of the three-dimensional coordinate signal, and the whole three-dimensional morphology cannot be fitted. A new type of digital micromirror device (DMD) applying DMD as core is proposed. The problem of over saturation in acquiring coded image for traditional charge coupled device (CCD) is solved with high dynamic range imaging of DMD. A new system is built based on traditional monocular three-dimensional measurement system. The digital model of three-dimensional measurement and high dynamic range imaging of DMD camera are established. Combined with the matching method of Gray Code, three-dimensional coordinates of the object are obtained. The experimental results show that the system has a positive effect on the imaging of object with specular surface, and relatively complete bitmap is obtained. The system is able to measure three-dimensional morphology with high dynamic range.