Preallocate array to store images from camera

I'm controlling a camera to take images in a while loop that ends when I hit a UI button. That means I don't know how many frames I will take when I turn the camera on. I want to save the images into a cell array, but how can I preallocate the array if I don't know the size? Would saving individual frames as a .jpeg into a folder be faster?

[Stephen23]

Just expand the cell array each time and don't worry about it.

The little time it requires is not going to be significant in your application.

[THAI CAM LINH HOANG]

Thank you!

[Samuel Katongole]

Try preallocating the array as an empty array. It may help.