Split an image into two sets

Hi, I need to split an image into two sets of pixels A and B, each randomly containing half of the pixels (using the rand function). Thanks in advance for any help.

Answer 1

[Matt J]

N=numel(yourImage);
indices=randperm(N,round(N/2));

A=yourImage(indices);
B=yourImage; B(indices)=[];

[Simona Neacsu]

Thanks! This helped a lot. This is how I finally did it:

randomind=randperm(numel(inital_image), numel(inital_image)/2);
imageA=image1;
imageA(randomind)=0;
imageB=imageA;
for i=1:size(imageA,1)
    for j=1:size(imageA,2)
if (imageA(i,j)==0) imageA(i,j)=image1(i,j); 
elseif (imageA(i,j)~=0) imageA(i,j)=0; end
end
end