What is a pixel anyway? pix·el (pĭk’səl, -sĕl’) n. The basic unit of the composition of an image on a television screen, computer monitor, or similar display. And how does it differ from film grain? A pixel, as you can see above, is the unit of measurement for digital. Film grain is an actual physical thing, whereas a pixel is a representation of something, usually on a computer screen, or your digital camera LCD screen. Screens are rated by their number of horizontal and vertical pixels; for example, 1024 x 768 means 1024 pixels are displayed in each row, and … Continue reading →