Color depth
From Wikipedia, the free encyclopedia
In computer graphics, color depth or bit depth is the number of bits used to indicate the color of a single pixel in a bitmapped image or video frame buffer. This concept is usually quantified as bits per pixel (bpp), which specifies the number of bits used. Color depth is only one aspect of color representation, expressing how finely levels of color can be expressed (a.k.a. color precision) ; the other aspect is how broad a range of colors can be expressed (the gamut). The definition of both color precision and gamut is accomplished with a color encoding specification which assigns a digital code value to a location in a color space.
Bit-Depth 1
Colors: 2 (monochrome)Bit-Depth 2
Colors: 4 (CGA)Bit-Depth 4
Colors: 16 (EGA)Bit-Depth 8
Colors: 256 (VGA)Bit-Depth 16
Colors: 65,536 (High Color, XGA)Bit-Depth 24
Colors: 16,777,216 (True Color, SVGA)Bit-Depth 32
Colors: 16,777,216 (True Color + Alpha Channel)
- 1-bit color (21 = 2 colors): monochrome, often black and white, compact Macintoshes, Atari ST.
- 2-bit color (22 = 4 colors): CGA, gray-scale early NeXTstation, color Macintoshes, Atari ST.
- 3-bit color (23 = 8 colors): many early home computers with TV displays, including the ZX Spectrum and BBC Micro
- 4-bit color (24 = 16 colors): as used by EGA and by the least common denominator VGA standard at higher resolution, color Macintoshes, Atari ST, Commodore 64, Amstrad CPC.
- 5-bit color (25 = 32 colors): Original Amiga chipset
- 6-bit color (26 = 64 colors): Original Amiga chipset
- 8-bit color (28 = 256 colors): most early color Unix workstations, VGA at low resolution, Super VGA, color Macintoshes, Atari TT, AGA, Falcon030.
- 12-bit color (212 = 4096 colors): some Silicon Graphics systems, Neo Geo, Color NeXTstation systems, and Amiga systems in HAM mode.
"True Color" redirects here. For images with natural color rendition, see true-color.
No comments:
Post a Comment