说明：  针对simulation中单频四步相移图像IM0-3及IMR0-3图像们进行四步相移测量的程序 refphase1是对参考面的测量并接缠绕得到相位角 solvephase是对测量物体的测量并得到相位角后，进行处理回复面形
(For simulation of single-frequency four-step phase shift image IM0-3 and IMR0-3 images have conducted four step phase shift measurement procedure refphase1 reference surface is measured and then get wrapped phase angle solvephase measurement object is measured and the resultant phase angle, the surface shape is processed Reply)