adding the pictures together

i have four cropped images...but i want to add them all together as one image with little spaces between them....anyone with head way...Thanks ahead

Answer 1

[Jan]

If you are talking about RGB images, which have all the same size and "add with little space" means to set them side by side with a black bar:

Img{1} = rand(100, 100, 3);
Img{2} = rand(100, 100, 3);
Img{3} = rand(100, 100, 3);
Img{4} = rand(100, 100, 3);

Img1to4 = cat(1, ...
  cat(2, Img{1}, zeros(100, 10, 3), Img{2}), ...
  zeros(10, 210, 3), ...
  cat(2, Img{3}, zeros(100, 10, 3), Img{4}));

If you want something else, please take the time to explain the details.