Vectorization is the process of converting raster images into vector lines by tracing them with computer programs. Different programs have varying methods of vectorization, and black and white images are typically easier to vectorize than those with complex color schemes. For more complicated images, additional information may be required to guide the program in line determination.

1. What is Vectorization?
Vectorization is the process of converting a raster image into a
vector line by having a computer program "trace" the image
and automatically create vector lines. Most programs that can
work with vector lines have methods for doing this
automatically, however they all function differently and some
images will work better in one program over others. Generally
speaking, black and white images are the easiest to vectorized,
as all the program has to do is draw a line along the border
between any black and white pixels. Images with more
complex color schemes can still be vectorized; however you
will have to tell the program more information about how to
determine where the lines are drawn.