Then, according to the geometrical optics, the modulation of structure light by the parallel projective illumination and the emanative projective illumination is discussed to educe the height formula corresponding to these two illuminative mode.

• 然后，基于几何光学分析，讨论物体轮廓对平行投影及发散投影结构光场调制问题，导出与这两种照明方式相适应的高度公式。