Pixels

Pixel is short for Picture Elements, pixels are small point of a graphic image. Graphic monitors display pictures by dividing into thousands or millions of pixels all aligned in rows and columns. They are so close together that it appears that they are joined together.

The number of bits used in a single pixel will vary depending on how many colours or shades of gray can be seen. For example, and 8-bit colour mode will use 8 bits for each pixel. 

On colour monitors, pixels consist of only three dots - a red, a green and a blue dot. The three dots should converge at the same point but some monitors have convergence errors which makes the colour pixels look fuzzy.

The quality of a display system depends mainly on the resolution, how many pixels it can display and how many bits are used to represent each pixel.