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pixel

(piks -ĕl) Short for picture element. The smallest element of a digital image, such as that produced by a CCD. See imaging.

pixel

[pik′sel]
(computer science)
The smallest part of an electronically coded picture image.
(electronics)
The smallest addressable element in an electronic display; a short form for picture element. Also known as pel.

pixel

pixel

(1) (Pixel) See Chromebook Pixel, Pixel and Pixel C.

(2) (PIX [picture] ELement) The fundamental display element of an electronic screen or bitmapped image. Screen resolution is rated by the number of horizontal and vertical pixels; for example, 1024x768 means 1,024 pixels are displayed in each row, and there are 768 rows (lines). Likewise, bitmapped images are sized in pixels: a 350x250 image has 350 pixels across and 250 down.

Pixels and Subpixels
In monochrome systems, the pixel is the smallest addressable unit. With color systems, each pixel contains red, green and blue subpixels, and the subpixel is the smallest addressable unit for the screen's electronic circuits. The software addresses the pixel, and the hardware addresses the subpixels that make up the pixel. For more on the red, green, blue concept, see RGB.

Pixel Structures
In storage, pixels are made up of one or more bits. The greater this "color depth" or "bit depth," the more shades or colors can be represented. The most economical system is monochrome, which uses one bit per pixel (on/off). Gray scale and color typically use from four to 24 bits per pixel, providing from 16 to 16 million colors. See color depth.

Displaying the Pixel
On a display screen, pixels are either phosphor or liquid crystal elements. For monochrome, the element is either energized fully or not. For gray scale, the pixel is energized with different intensities, creating a range from light to dark. For color displays, the red, green and blue subpixels are each energized to a particular intensity, and the combination of the three-color intensities creates the perceived color to the eye. For subpixel details in an LCD screen, see LCD subpixels. See screen resolution, vertex shader and bad pixel.


A Monochrome Bitmap
The simplest pixel representation is a black and white monochrome image in which one bit represents one pixel. Monochrome CRTs use white, green or amber phosphors as a single color over a gray/black screen background.







Color is Always RGB
Although the "9" appears monochrome, it is displayed on the color screen of a car's navigation system. Upon close inspection, one can see the red, green and blue subpixels.







References in periodicals archive ?
Product/Service/Works Keywords: Vivotek ip 8161 mega pixel true day night camera
The high sensitivity of Avago's low profile 2 mega pixel ADCC-4050 with its built-in autofocus firmware enables the ultra-fast ARCTIC 416 to capture and print sharper and truer images under all lighting conditions," said Feisal Mosleh, director of worldwide marketing and support for the Mobile Imaging Business at Avago Technologies.
3 mega pixel camera with flash and digital zoom, plus an embedded stereo speaker for good sound quality and an external TransFLASH memory card that supports expandable storage of personal content.
The resolution of the camera phones continues to increase every year, with 1 mega pixel representing the majority of camera phone shipments this year, and 4 mega pixels forecasted to represent the majority of shipments in 2010," said Scott Smyser, director and principal analyst for Communications and Consumer Electronics at iSuppli, an El Segundo, Calif.
can store 788 images for photo enthusiasts with a 3 mega pixel digital camera, and even more images with higher mega pixel cameras.
3 mega pixel resolution with a maximum photo resolution of 2016 x 1512 and 10x optical zoom.
DALSA Scientist, Cees Draijer, presented the paper, "A 28 Mega Pixel Large Area Full Frame CCD with 2x2 On-Chip RGB Charge-Binning for Professional Digital Still Imaging.
Discover the R&D efforts of different manufacturers to develop 3G handsets, mega pixel camera phones, small battery packs and more compact headsets