Grayscale image to 2D array?

can anyone teach me how to store grayscale image into 2D array format?

[Marta Salas]

Do you have an image on your disk and you want to load it on MATLAB?

Answer 1

[Image Analyst]

If it's in a file on disk

grayImage = imread(fullFileName);

For a full example, see a random demo I attached (does a DOG filter).