how to interchange the blocks randomly

clear all;

im=imread(uigetfile('*.*'));

im=imresize(im,[200 200]);

[x y z]=size(im);

im=mat2cell(im,[50 50 50 50],[50 50 50 50],3);

in the above code the uint8 image is divided into 16 blocks and i want to interchange the blocks and display the image after interchanging.sir can u help how to implement it

[Image Analyst]

What does permutation of image mean to you? There is a permute() function - would you like to use that? Why do you need/want to use some special "pseudo random index linear feedback shift register" algorithm (whatever that is)?

[Jan]

@sonam s: The question does not contain enough information to be answered yet. Please add more details by editing it.