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Depth of colour piksela or bits in piksel in digital photos |
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| Depth of colour piksela or bits in piksel in digital photos |
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| Digital photos are constructed of many pikselov. Everyone piksela has a unique value which represents its colour. When you look at a digital photo, your eyes and a brain are merged by these piksely in one continuous digital photo. Everyone piksela has a colour value which is one of final number of possible colours – this number is known as colour depth. |
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Digital photos are constructed of many pikselov. Everyone piksela has a unique value which represents its colour. When you look at a digital photo, your eyes and a brain are merged by these piksely in one continuous digital photo. Everyone piksela has a colour value which is one of final number of possible colours – this number is known as colour depth.
Everyone piksela has a colour value which is one of a palette of unique colours. The number of such unique potential colours is known as colour depth. Colour depth also is known as bit depth or bits in piksel, as the certain number of bits is used to present colour and there is a direct correlation between number of such bits and number of possible unique colours. For example, if colour piksela is presented on one bit - one bit for piksel or small depth 1 - at piksela can be only two unique values or two unique colours – usually, these colours will be black or white.
Colour depth is important in two areas: a graphic input or a source and production device on which this source is shown. Each digital source of a photo or other graphic sources are shown on devices of production, such as screens of the computer and have printed a paper. Each source has a colour depth. For example the digital photo can have a colour depth of 16 bits. Initial depth of colour depends on how it has been created for example, colour depth of the gauge of the chamber was in the habit to shoot at a digital photo. This colour depth is independent of the device of production used to show a digital photo. Each device of production has a maximum colour depth which it supports and can also be going to lower colour depth (usually to rescue resources, such as memory). If production device has higher colour depth than a source production device will not be used completely. If production device has lower colour depth than a source production device will show lower qualitative version of a source.
Many times you will hear the colour depth expressed as many bits (bit depth or bits in piksel). Here a table of the general bits in value piksela and number of colours which they represent:
* 1 bit: two colours are supported only. Usually they it is black-are white, but it can be any pair of colours. It is used for black-and-white sources and in rare instances black-and-white screens.
* 2 bits: 4 colours are supported. Hardly used.
* 4 bits: 16 colours are supported. Hardly used.
* 8 bits: 256 colours are supported. Used for graphic and simple images. The digital photos shown, using 256 colours, have poor quality.
* 12 bits: 4096 colours are supported. It is hardly used with the computer screen, but sometimes this colour depth is used by mobile devices, such as PDAs and phones. The reason - that colour depth on 12 bits - a limit for high-quality digital display of photos. Screens on less than 12 bits deform digital colours of a photo too much. More low colour depth is less than memory and resources are necessary, and such devices - the limited resources.
* 16 bits: 65536 colours are supported. Provides high-quality digital colour display of photos. This colour depth is used by many screens of the computer and portable devices. Colour depth on 16 bits is sufficient to show digital colours of a photo which are is very close to the truth.
* 24 bits: 16777216 (approximately 16 million) colours are supported. It also is known, as “true paint”. The reason for that name of a notch - that on 24 bits consider colour depth more than number of unique colours which can see our eyes and a brain. So use of colour depth on 24 bits provides ability to show digital photos in true real colours.
* 32 bits: unlike what some people believe, that colour depth on 32 bits does not support 4294967296 (approximately 4 billion) colour. Actually colour depth on 32 bits supports 16777216 colours which is the same number as colour depth on 24 bits. The reason for colour existence of depth on 32 bits mainly for optimisation of work of speed.
As the majority of computers uses buses in multiplication of 32 bits, they - more effective using pieces on 32 bits of data. 24 bits from these 32 are used to describe colour piksela. Additional 8 bits either leave pure or are used in some other purpose, such as instructions of a transparency or some other effect. |
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| About the Author |
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It is more than information concerning the digital press of a photo and a photo it is accessible on http://printrates.com - a site about a photo printing article This, can be republished, only if a resource box, including backlink it is included. Ziv Haparnas writes about technology and a digital photo.
Article source: http://www. ArticlesTake.com/author-ziv-h.-694.html |
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