A sampling rate increasing method using matrix low-pass filter and discrete cosine transform

In this paper, the design of matrix low-pass filter using discrete cosine transform (DCT) is presented. First, the matrix low-pass filter design problem is described. Then, the transfer matrix of the matrix low-pass filter is obtained by using DCT. Next, the designed matrix low-pass filter is applied to develop a sampling rate increasing method. Finally, a digital image magnification application is presented to show the effectiveness of the proposed matrix low-pass filter method.