true colour

(graphics)A system where the red, green, and blue componentsof a colour are stored in display memory, as opposed tostoring logical colours and using a colour palette toconvert them to red, green, blue components.

The advantage of true colour over a palette is that it doesnot restrict the range of colours which can be displayed onscreen simultaneously. For example, if eight bits are used tostore each component of each pixel then a total of 2^24(about 17 million) different colours can be displayed at oncewhich would require a (very expensive) palette with 3 * 2^24bytes (about 50 megabytes) of memory.

The disadvantage of true colour is that image transformationswhich would normally be done by changing the palette must bedone to every pixel of the image which can be much slower.

Compare high colour.

单词	true colour
释义	IdiomsSee(one's) true color(s) true colour true colour (graphics)A system where the red, green, and blue componentsof a colour are stored in display memory, as opposed tostoring logical colours and using a colour palette toconvert them to red, green, blue components. The advantage of true colour over a palette is that it doesnot restrict the range of colours which can be displayed onscreen simultaneously. For example, if eight bits are used tostore each component of each pixel then a total of 2^24(about 17 million) different colours can be displayed at oncewhich would require a (very expensive) palette with 3 * 2^24bytes (about 50 megabytes) of memory. The disadvantage of true colour is that image transformationswhich would normally be done by changing the palette must bedone to every pixel of the image which can be much slower. Compare high colour.
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