Introduction to the concept of pixels on computer screen

Introduction to the concept of pixels on computer screen

A PIXEL is the smallest point/element of an all point addressable device. It is the tiniest part of the computer screen. Pixels are used for Raster image. Each pixel comprises of a sample of the original picture. Images made up of pixels are called as Raster Images. In digital publications, always, raster images are in demand compared to vector images. Also, Raster images are commonly used in Graphic applications too.

Introduction to the concept of pixels on computer screen

The term pixel is a word invented from “picture element”. It is the fundamental unit of programmable color on a computer display or computer screen or in a computer image. The physical size of a pixel varies depending on how you have set the resolution of your screen.

If your display is set to its maximum resolution, the physical size of a pixel is equal to the physical size of the dot pitch of the display or screen. On the other hand, if your screen or resolution is set to something less than the maximum resolution, a pixel will become bigger than the physical size of the screen’s dot because the pixel will use more than one dot.

The particular color that a pixel shows is some blend of three components of the color spectrum, the RGB. Raster image or raster graphics are digital images captured or created as a group of samples of a given space. An example is when you scan a picture. The grid of x and y coordinates on a display space is what you call a raster.

A raster image file identifies which of these coordinates to illuminate in color or monochrome values. The raster file is occasionally referred to as a bitmap because it holds information that is directly mapped to the display grid.