Here is equation 8 which is referenced:

Design a 16-point KLT transform for i More specifically, using the mages. training images, such as Lena and Barbara, to determine the correlation matrix Cx of the input source X = Xi, X2, , X,61. Then, find the SVD decomposition of Cx and determine the KLT matrix according to (8). Plot the basis functions of the KLT transform, i.e., the column vectors of the KLT transform matrix. 16]