does px stand for pixels

Pixel - Wikipedia, the free encyclopedia


** Pixel **

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This article is about the picture element. For other uses, see Pixel
This example shows an image with a portion greatly enlarged, in which the
individual pixels are rendered as small squares and can easily be seen.
A photograph of sub-pixel display elements on a laptop's LCD screen

In digital imaging, a *pixel*, *pel*,^[1] or *picture element*^[2] is a
physical point in a raster image, or the smallest addressable element in an
all points addressable display device; so it is the smallest controllable
element of a picture represented on the screen. The address of a pixel
corresponds to its physical coordinates. LCD pixels are manufactured in a
two-dimensional grid, and are often represented using dots or squares, but
CRT pixels correspond to their timing mechanisms and sweep rates.

Each pixel is a sample of an original image; more samples typically provide
more accurate representations of the original. The intensity of each pixel
is variable. In color image systems, a color is typically represented by
three or four component intensities such as red, green, and blue, or cyan,
magenta, yellow, and black.

In some contexts (such as descriptions of camera sensors), the term /pixel/
is used to refer to a single scalar element of a multi-component
representation (more precisely called a /photosite/ in the camera sensor
context, although the neologism /sensel/ is sometimes used to describe the
elements of a digital camera's sensor),^[3] while in others the term may
refer to the entire set of such component intensities for a spatial
position. In color systems that use chroma subsampling, the multi-component
concept of a pixel can become difficult to apply, since the intensity
measures for the different color components


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