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 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 ?
We start the comparison by noting that the pairs of triangular pixels consist of one which is 15/16 as large as the corresponding square pixel and the other 21/16 larger.
As an option, some suppliers offer cameras with fewer pixels to scan as a way to attain even faster rates, but this increase must be balanced by the loss in crossweb resolution.
In much the same way, the goal of the Pixel is to make the pixels disappear, giving people the best web experience.
8 /PRNewswire/ -- Can the idea of selling pixels -- those tiny little dots that comprise web graphics and pages -- make you a millionaire?
We feel the partnership with Du Pont Pixel fulfills that need by providing complete system solutions for image processing.
The ability to select and change brightness of each individual pixel within the AMTFT.
The Macintosh Quadra 700 and 900 both support the new 16" display at up to 24 bits per pixel when configured with additional VRAM.
75um pixel, 1/4-inch lens aperture 3M-pixel CIS shows no degrading in the picture quality compared to a 2.
RAW+JPEG (4,256 x 2,848 pixels, 3,024 x 2,016 pixels, 2,304 x 1,536 pixels) dual-save mode
We're excited to continue to build the Pixel Chix(TM) world with new environments, play patterns and features, and the Pixel Chix(TM) Love 2 Shop(TM) Mall is sure to be a huge hit this holiday.
Beginning in September, Blue Pixel will teach the AP staff photographers and editors about the technical aspects of capturing, managing and delivering AP images.