Color depth
Unit of measure for the number of bits of information stored per pixel. It denotes how much color information is available in the file or scanner. A larger color depth means that more colors can be represented correctly in the digitized image. A pixel with a color depth of 1 has two possible values: 1 or 0, on or off (black or white). A pixel with a color depth of 8 has 8 bits giving 256 possible values, and a pixel with a color depth of 24 has 24 bits or 16 million colors.
