包含用于条纹图像的旋转滤波、四步相移法程序和多频外差算法程序，用于光栅投影法的三维重建-Contains filter fringe image rotation, four-step phase shift method procedures and multi-frequency heterodyne algorithm for three-dimensional reconstruction of the grating proj

实现三频外差法展开相位，包含理想条纹图片数据。(multi frequency unwrapping phase including standard fringe data)

多频外差法，求绝对相位，3种方法对比。。。。。。(The multifrequency heterodyne method, the absolute phase, three methods are compared.)

用于生成多频外差法的图像，可以设定频率，默认采用三频，文件包含误差计算程序(For the image generated by multi frequency heterodyne method, the frequency can be set, and three frequency is used by default)