Pixels

                                            What is a Pixel? 

A pixel is a (a word invented from "picture element") is the basic unit of programmable colour on a computer display or in a computer image. 


Graphics monitors display pictures by dividing the display screen into thousands or millions of pixels, arranged in rows and columns. The pixels are so close together that they appear connected. The number of bits used to represent each pixel determines how many colours or shades of Gray can be displayed.

A good way that pixels are used to is make pixel art which can be seen here from a game called "Undertale". 

What is pixel art? 

Pixel art is a form of digital art, created through the use of software, where images are edited on the pixel level. The majority of graphics for 8-bit and 16-bit computers and video game consoles, as well as other limited systems like graphing calculators, is pixel art.

Types Of Digital Graphics

Raster Images 

BMP -Bitmap

GIF -Graphics Interchange Format

TIFF -Tag Image File Format

JPG -Joint Photographic Experts Group

Raster photos are composed,Raster images are often called bitmap images because they are made of millions of tiny squares, called pixels. You can identify a raster or bitmap image by looking at it very closely. "If you zoom in enough" you will be able to see the square outlines of each pixel. A raster graphics or bitmap image is a dot matrix data structure,representing a generally rectangular grid of pixels or points of colour

Vector Image 

PSD -Photoshop Data file

WMF -Windows Meta-file Format

FLA -Adobe Flash

AI- Adobe Illustrator 

-Vector graphics is the creation of digital images through a sequence of commands or mathematical statements that place lines and shapes in a given 2D or 3D In physics, a vector is a representation of both a quantity and a direction at the same time.

They are mainly used to make logo or designs thanks to Adobe Illustrator And Adobe Photoshop.

Here is a video to help understand and explain better.