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billion pixel

May 31st, 2008 admin No comments

billion pixel

Digital photos are built of many pixels. Each pixel has a unique value representing its color. When you are looking for in a digital photo of your eyes and the brain merge these pixels into one continuous digital photography. Each pixel has a color value which is one of a finite number of colors available in this number is known as color depth.

Each pixel has a color value which is one of a unique color palette. The number of colors so unique potential depth is known as color. Color depth is also known as bit depth or bits per pixel, since a certain number of bits used to represent a color and there is no correlation between the number of bits as possible and the number of unique colors. For example, if a pixel color is represented by a little – one bit per pixel or bit depth 1 – the pixel values can only have two single or two colors only these colors are usually black or white.

Color depth is important in two areas: the input graph or the source and output device shown in this source. Each source of digital photography and other graphics sources shown in output devices such as computer screens and printed paper. Each source has a color depth. For example, a digital photograph can have a depth 16-bit color. The color depth of origin depends on how it was created, for example, the color depth sensor camera used to shoot a digital photo. The color depth is independent of the output device is used to display digital photography. Each output device has a maximum color depth support, and can also be set to a lower color depth (usually to save resources such as memory). If an output device has a higher color depth the source of the output device are not fully utilized. If an output device has a lower color depth of the source of the output device will display a version lower quality of the source.

Many times you hear the depth of color, expressed in number of bits (bit depth or bits per pixel). Here is a table common bits per pixel values and the number of colors that represent:

  • 1 bit: Only two colors are supported. These are normally white and black, but can be any pair of colors. It is used for sources of black and white and in rare cases of black and white screens.
  • 2 bits: 4 colors are supported. Rarely used.
  • 4 bits: 16 colors are supported. Rarely used.
  • 8 bit: 256 colors are supported. Used for simple graphics and icons. Digital photos are displayed with 256 colors of poor quality.
  • 12 bits: 4096 colors are supported. It is no use with the computer screen, but sometimes the color depth is used by mobile devices such as PDAs and phones. The reason is that the 12-bit depth color display is the limit for high quality digital photos. Less than 12-bit screens distort the colors of digital photos too. The lower the color depth less memory and resources are required such devices and limited resources.
  • 16 bits: 65536 colors are supported. Offers high quality color digital display photos. The color depth is used by many computer screens and portable devices. 16-bit color depth is sufficient to show the colors of digital photo are very close to real life.
  • 24 bits: 16777216 (approximately EUR 16 million) colors are supported. This is also known as "color true ". The reason that the nick name is that the 24-bit color depth is seen more as the number of unique colors of our eyes and brain can see. So with 24 bit color depth provides the ability to display digital photos true colors of real life.
  • 32 bit: in contrast to what some people believe that the color depth of 32 bits is not supported 4294967296 (about $ 4 million) color. In fact, the depth 32-bit color support 16,777,216 colors is the same number of 24-bit color depth. The reason for existence in 32-bit color depth is mainly to optimize the speed of performance. Like most computers use the buses in the 32-bit multiplications are more efficient than using pieces of 32 bits of data. 24 bits of the 32 are used to describe the color of the pixel. The extra 8 bits are left blank or used for other purposes such as indicators of transparency or some other effect.

    • About the Author:

    Information about photography and photo prints is on printrates.com – your home for cameras and printing This article can be reprinted only if the resource box including the backlink is included. Ziv Haparnas writes about practical technology issues.

    Article Source: ArticlesBase.com – Pixel Color Depth Or Bits Per Pixel in Digital Photos

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