color depth

(redirected from 48 bit colour)

color depth

The number of bits used to hold a screen pixel. Also called "pixel depth" and "bit depth," the color depth is the maximum number of colors that can be displayed. True Color (24-bit color) is required for photorealistic images and video, and modern graphics cards support this bit depth.

Per Pixel or Per Subpixel
The color depth of a screen can be referenced by the number of bits in each subpixel or by the total number of bits per pixel. For example, 8-bit color and 24-bit color can mean the same system. The 8-bits refers to each red, green and blue subpixel, while the 24-bit means all three subpixels. Likewise, 10-bit color (subpixels) and 30-bit color (pixels) are the same. See indexed color and bit depth.

Bits Per Pixel    Total Colors

    4    16  (Standard VGA)
    8    256 (Super VGA, indexed color)
   15    32K (option on earlier cards)
   16    65K (High Color)
   24    16M (True Color)
   32    16M (True Color + alpha channel)
   30     1B (Deep Color)
   36    68B (Deep Color)
   48   260T (Deep Color)


References in periodicals archive ?
Resolution- 9600Dpi, Data Capture- 48 Bit Colour,16 Bit Of Grayscale, Start Up Time- No Warm Up Time,Imaging Technology-New Single Sensor Imaging Technology, Scanning Speed- 13 In/Sec,1 Bit Mono @ 200 Dpi,13 In/Sec,8 Bit Grayscale @ 200 Dpi,3.
The built-in three line optical CCD sensor means the GT-1500 is capable of scanning at up to 1200dpi optical resolution at 48 bit colour depth.
With a resolution of 1200x1200 dpi and 48 bit colour the 3570 delivers photo quality results every time you scan and it is also ideal for monochrome artwork, line drawings and text documents.