If you’re one to surf the web, chances are that you’ve seen and used tons of raster images before. Whenever you take a photo with your phone, or take a screenshot on your computer, you’re creating a raster image.
Raster images (or bitmaps) are composed of pixels. Each pixel contains data that determines its color, such as its hue, saturation, value, transparency, etc.
Usually, raster images can’t be scaled any larger than their original width and height. In doing so, you’re asking the image editor to add more pixels where there aren’t any more. This results in an unattractive, blurred image—at least, in most cases.
Vector images, meanwhile, are composed of lines called “paths” and points called “anchors.” They dictate how an image should render based on mathematical theory. This formulaic approach allows vector images to be scaled to any size without losing their quality. Text is one of the most common types of vectors!
Read more at https://www.makeuseof.com/raster-vs-vector-images/
