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There are two different types of graphics files: vector images, and raster images. Vector images are made up of paths to create an image. Raster images are made up of pixels to create an image. But what is the difference between the two?
Vector images must be created using a computer software program before it can be used in Photoshop. This is because Photoshop is pixel based. The most common computer software used to create vector images is Adobe Illustrator. Defining a vector image will always be simple, just look at the edges, it will always be smooth no matter how big it has been zoomed to.
Raster images are also known as bitmap images and are made up of pixels. Defining a raster image is also simple: just zoom it in, as the image gets larger the picture becomes block-like.
Vector images are more commonly used to create logos, business cards, billboards, etcetera. Vector images are appropriate to use for these because they are prints, that can blow them up as big as needed or mad as small as desired. Raster images are commonly used with photographs and digital images for websites. These are pixellated and digital looking, therefore, raster images are more appropriate.
Another important thing to add about Vector and Raster images is the file sizes. Since Vectors are made up of paths, the file sizes are much smaller compared to that of a Raster image. The reason behind this is because raster images are made up of pixels. When the file is saved, it has to make up for the pixel sizes; this causes raster image files to be larger than vector image files, something to keep in mind.
Written by Alexis Norman
Edited by Jeanette Smith
Sources:
Tech Terms: Vector Graphic
Tech Terms: Raster Graphic
Design Shack: Vector vs. Raster: What Do I Use?
Top Image and Featured image Courtesy of Alexis Norman