How do I store an image in array ?

I need to store an image in array, so the value to store in array is:

X: 0

Y: 0

Value: image_name.???

How should I type the value since the image object name alone is not enough ?

Thanks in advance.

i think you can't save an object. but you can save it's IID

This is simple way to do but if you think you could do lot with it