If you've ever worked with Adobe Photoshop or any image processing tool, you've probably resized an image to a certain frame or dimension. Suppose the original image dimension is 600x800 (3:4 aspect ratio) and you want to fit everything in a 500x750 (2:3 aspect ratio) frame. What you will do is to shrink the width from 600 to 500 and stretch the height from 800 to 750. This process of resizing is called image scaling in computer graphics.