Raster vs Vector Images

The main reason between these two is that; the raster works with pixels (those small boxes that when you zoom into the picture they start to appear), while the vector works with lines, dots, curves and shapes in general.

Raster Type and Vector Type

Raster images; are measured in pixels, and it has a certain amount of pixels within each inch and that is the ppi (pixels per inch).
The quality of the image will change depending of how many ppi it has. The lower the ppi is, the less quality the image will have, and the higher the ppi is, the higher the quality.
An advantage that this type has on vector is that it has more support for effects and more colours.

Vector images; because pixels aren't used in this type of image, it is resolution-independent.
This means that the image won't lose any of its quality and that is one of the advantages a vector has on raster. Other advantages are that when designing a vector you will have unlimited scaling and unlike raster images the file of the designs will be smaller.

The use of both types & the type of file formats

Below you can find an activity we did in the class with a raster image and sticky notes. Basically we drawn a grid on the raster image so we would know how many boxes(pixels) there are, and then for every pixel we used a sticky note to represent it and to make a model of it.

A Raster Image with a Drawn Grid

The model of the image with the sticky notes