Pixellation occurs when the individual pixels of a digital image become visible to the naked eye, often due to low resolution or excessive enlargement. Instead of appearing as a smooth, continuous image, the picture looks blocky or jagged, with each square pixel clearly distinguishable.
Pixellation is commonly encountered in digital photography, computer graphics, and video when images are scaled beyond their intended resolution. Understanding pixellation helps photographers, designers, and editors maintain image clarity, choose appropriate resolution settings, and produce high-quality prints or digital displays.