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What is meant by Vector artwork and why is it necessary?

Raster vs Vector

Raster images are created with pixel-based programs or captured with a camera or scanner. Common examples have the file extensions of: .bmp, .jpg, .gif, .png, and are widely used on the web. Individual components cannot be altered or separated and resolution will distort when the size is increased.

Vector graphics are created with vector/graphic software such as Adobe Illustrator or Corel Draw. Common examples have the file extensions of: .eps, .ai, .cdr, and .pdf. Individual components can be separated, colors can be changed, and the size can be increased with no loss of resolution.


Image result for raster vs vector image

Raster images are made of pixels. A pixel is a single point or the smallest single element in a display device. If you zoom in to a raster image you may start to see a lot of little tiny squares.

Vector images are mathematical calculations from one point to another that form lines and shapes. If you zoom into a vector graphic it will always look the same.