DCT Based Algorithm for Least Squares Phase Estimation
用DCT进行最小二乘相位估值的求解

The estimation of phases from measurements of phase differences plays an important role in radar interferometry, adaptive optics, compensated imaging and image processing. The derivation of Possion's equation from the least squares estimation with the concept of the 2 norm is presented in this paper. It has been shown that the equation can be solved by use of the cosine transforms.