Checking the image resolution

When working with images, there are two distinct types of images.

One type is called vector images, and they are made up of many individual points (called anchor points) that are connected by mathematically calculated lines (called paths), which can be either straight or curved. Vector images are constructed a bit like a child’s dot-to-dot drawing, and no matter how big you make them, the paths between these anchor points simply get recalculated, meaning they can be scaled infinitely to any size you wish. In effect, they have no resolution, and for this reason, they are commonly used in the design of logos, packaging, fashion, and other areas where such scalability is a factor. For example, the same vector logo could be used on your business cards and also your 50-foot-long building sign with no impact on the quality. Common vector file formats include AI and SVG files.

The other type of image is a raster image, and these images are made up...