Vectorising is the process of converting raster graphics to line drawings. Bitmap images consists of pixels and cannot be enlarged without loss of quality. A line drawing is a drawing consisting of dots that are connected with lines, which may be bend or not.
a technique of neo-impressionist painting using tiny dots of various pure colors, which become blended in the viewer's eye. It was developed by Georges Seurat with the aim of producing a greater degree of luminosity and brilliance of color.