When we talk about the size of an image, we can either be referring to the file size, measured in bytes, or the dimensions of the image, measured in pixels. I will explain both of these and how they relate to each other. When you take a picture on your camera or phone, the camera...
there is roughly a square law when it comes to image dimensions and file size. If you double the width and height, you almost quadruple the file size. And that's assuming you've written the code to load the correct size of image rather than loading large image...