Raster to vector conversion is done on images which originally feature particular dimensions and lose sharpness when stretched beyond a certain point. If you have a sketch and you want a larger version of it, vector conversion is the best option available to you. In this conversion, images in bitmap formats like JPEG, GIF, PSD etc. are converted to vector formats like SVG, AI, EPS, PDF etc. When converted to a vector format, the quality of the image remains intact regardless of to what level the image is zoomed. Presently, Adobe Illustrator is the best application for such conversions.
Images converted to vector are more focused, densely colored and sharper than bitmap images. Vectorized sketches can be used for many purposes. You can get a printed version of the same and place them on a wall in your home or can use them for big posters. And if wanted, you can...