翻訳と辞書
Words near each other
・ bit-robbing
・ bitblt
・ bite
・ bitmap
・ bitmap display
・ bitmap font
・ bitmapped display
・ bitnet
・ bitonal image
・ bits per inch
bits per pixel
・ bits per second
・ bittorrent
・ bitty box
・ bitwise
・ bitwise complement
・ bixie
・ biz-core stability
・ bj
・ bjarne stroustrup


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bits per pixel : FOLDOC
bits per pixel
(bpp) The number of bits of information stored per pixel of an image or displayed by a graphics adapter. The more bits there are, the more colours can be represented, but the more memory is required to store or display the image.
A colour can be described by the intensities of red, green and blue (RGB) components. Allowing 8 bits (1 byte) per component (24 bits per pixel) gives 256 levels for each component and over 16 million different colours - more than the human eye can distinguish. Microsoft Windows [and others?] calls this true colour. An image of 1024x768 with 24 bpp requires over 2 MB of memory.
"High colour" uses 16 bpp (or 15 bpp), 5 bits for blue, 5 bits for red and 6 bits for green. This reduced colour precision gives a slight loss of image quality at a 1/3 saving on memory.
Standard VGA uses a palette of 16 colours (4 bpp), each colour in the palette is 24 bit. Standard SVGA uses a


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