Raster Art vs Vector Art
Why We Need Vector Art For Printing:
What Exactly is Vector Art?
The technical definition of vector graphics is complicated! In a nutshell, vector files (encapsulated postscript) define a graphic by using mathematical algorithms, which allow the image to be scaled or modified without loss of image quality or resolution. When your artwork or logo is in a vectored format (either .ai or .eps), it allows you to increase or decrease the size of the graphic without compromising the integrity of the original image. The end result is a crisp, clear, and readable image no matter what the final output or size! Vector graphics are sometimes also referred to as "draw graphics", but they mean the same thing.
When you create an image in Adobe Illustrator (or in Freehand or CorelDraw), you are creating a vector graphic. However, when you create an image in a program like Adobe Photoshop, you are creating a bitmap graphic (which is NOT a vectored format). A vector graphic retains its crispness at any magnification, and a bitmap graphic appears jagged when scaled up.
What Exactly is Raster Art?
Raster artwork is any digital art composed of horizontal and vertical rows of pixels. As a result, when raster images are enlarged, the image quality diminishes significantly. Typical raster file types include .psd, .tif, .jpg, .gif, and .bmp. Vector artwork is digital art composed of mathematical lines and curves.