Difference between revisions of "RGB"
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| − | '''RGB''' (Red, Green, Blue) is a common way of representing colour in a digital image. The colour of each [[pixel]] is represented by three numbers, being the amount of red, green and blue light making up that colour. These are | + | '''RGB''' (Red, Green, Blue) is a common way of representing colour in a digital image. The colour of each [[pixel]] is represented by three numbers, being the amount of red, green and blue light making up that colour. These are normally 8-bit binary numbers, and so range between 0 and 255 when written in decimal (or x00 and xFF in Hexadecimal)- as seen in colour selectors in photo processing programs. |
| − | This leads to the | + | This leads to the most frequently used [[resolution|colour depth]] of 24 bits. |
| − | There are alternatives to RGB, such as [[CMYK]]. | + | There are alternatives to RGB, such as [[CMYK]] - which is often used to specify colours to computer printers. |
| − | RGB is the most | + | RGB is the most popular way to represent colours in digital image files; GIF files use RGB in their indexed colour table, and formats such as [[JPEG]] and [[TIFF]] have RGB as the most favoured option. |
| − | RGB is also a | + | RGB is also a simple method of connecting computer monitors, where colour is represented by three separate analogue signals - and the computer hardware will often use RGB for colour representation. |
[[Category: Digital]] | [[Category: Digital]] | ||
Revision as of 01:59, 8 May 2009
RGB (Red, Green, Blue) is a common way of representing colour in a digital image. The colour of each pixel is represented by three numbers, being the amount of red, green and blue light making up that colour. These are normally 8-bit binary numbers, and so range between 0 and 255 when written in decimal (or x00 and xFF in Hexadecimal)- as seen in colour selectors in photo processing programs. This leads to the most frequently used colour depth of 24 bits.
There are alternatives to RGB, such as CMYK - which is often used to specify colours to computer printers.
RGB is the most popular way to represent colours in digital image files; GIF files use RGB in their indexed colour table, and formats such as JPEG and TIFF have RGB as the most favoured option.
RGB is also a simple method of connecting computer monitors, where colour is represented by three separate analogue signals - and the computer hardware will often use RGB for colour representation.
