Vectorization is the process of converting raster graphics into vector graphics.
Vector image files are easier to modify than raster image files (which can, however, sometimes be reconverted to vector files for further refinement).
Vector-oriented images are more flexible than bit maps because they can be resized and stretched. In addition, images stored as vectors look better on devices (monitors and printers) with higher resolution, whereas bit-mapped images always appear the same regardless of a device's resolution. Another advantage of vector graphics is that representations of images often require less memory than bit-mapped images do.