Digital Image Fundamentals

A digital image is composed of a set of points called pixels (an abbreviation for Picture Element) to form an image. The pixel thus represents the smallest constitutive element of a digital image^[1]

All these pixels are contained in a two-dimensional array constituting the image, as mentioned in [Figure 2].

We can consider that a pixel has no dimension because, when we look at a photo, a pixel of an object located near the camera corresponds to a smaller size than a pixel of an object located far from the camera, even though these two pixels are part of the same image.