how do i convert an image into gauss-markov sequence?

I have converted an image to a gaussian distribution using the foll code. a=imread('lena.jpg'); A=rgb2gray(a); P1=im2double(A);

K = P1(:) PD=fitdist(K,'normal')

How can i convert the same into a gauss-markov distribution

[Brendan Hamm]

It is not clear what you mean by convert this to a Gauss-Markov Sequence. This sounds a lot like you are trying to create a Gaussian-Markov Process, but this is a time varying process (as the name implies) and I'm not sure how you imagine this pertains to a still image?