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De - Pt| English Dictionary: bits per pixel | by the DICT Development Group |
| 1 result for bits per pixel | |
| From The Free On-line Dictionary of Computing (15Feb98) [foldoc]: | |
|
bits per pixel 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 {truecolour}. 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 {palette} of 256 colours (8 bpp). Some graphics hardware and software support 32-bit colour depths, including an 8-bit "{alpha channel}" for transparency effects. (1999-08-01) | |
