Manual vectorizing :
In this case a specialized person digitizes the image by hand (using a mouse or digitizer) creating the necessary nodes and shapes to produce the supplied image. The resulting vector drawing is the best possible with the fewest nodes and depends very little on how good the original image is. This method also guarantees that all stems will be uniform and the thickness will be the same in all letters etc.
Automatic image tracing :
Most graphic design programs today offer automatic image tracing functionality. The user specifies the image and tracing parameters and the program converts the image within a few seconds to vector format. The resulting drawing’s quality depends on the quality of the original image. It usually needs a lot of editing (and time) to remove nodes and adjust curves for smoothness and accuracy.
Hand vectorized artwork is by far more superior in quality than any automatically generated one.
Manual vectorizing
by evectorize.com
Original (scanned)
Image
Automatic image tracing
using a software package
evectorize.com always supplies files manually vectorized by skilled experienced personnel. This guarantees the best possible quality for your vector files at any magnification.