中文说明：
基于离散余弦变换的最小二乘法相位解包裹(DCT)，peaks生成包裹相位图，用LS-DCT解包裹得到去包裹的真实相位图
English Description：
The least square phase unwrapping (DCT) based on discrete cosine transform (DCT) is used to generate the wrapped phase map by peaks, and the unwrapped real phase map is obtained by ls-dct