pixel

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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 phone 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 ?
The top variant of Pixel 3 with 4GB RAM and 128GB storage costs Rs 58,999 on Flipkart and Rs 59,990 on Amazon.
The pixels in the original matrix are sorted and median value o the sorted pixels are obtained.
Thodi and Rodriguez [23] first proposed PEE method, which predicted pixels and embedded data employing the produced errors instead of pixel differences.
As seen in the Fig.2, other features besides the optic disc pixels are removed.
Most binary image watermarking algorithms based on flipping pixels would use the scoring standard proposed by Wu and Liu [8].
Through advances in pixel and process technology, smartphone and tablet cameras have made it easier than ever for consumers to capture and share beautiful, clear images with the world, said Taehoon Kim, vice president of System LSI marketing, Samsung Electronics.
ielikainen's method partitions cover pixels into pixel pairs.
So it is appropriate a half century later to consider how we might use variable shape pixels to better (or more accurately) represent scientific images.
6) shows anti-aliased (black) ant slope (gray) pixels to show how this algorithm works.
2.07 mega pixels: 1,920 horizontal X 1,080 vertical) images is rapidly eXpanding with the widespread acceptance of Broadcasting Satelite digital broadcasts and wider reception areas for terrestrial digital broadcasts.
Johan Feenstra of Philips Research in Eindhoven, the Netherlands, describe a new type of e-paper pixel. It looks dark when covered by a thin film of colored oil.
A popular measurement of similarity compares counts of the number of pixels in particular color categories.