Motivations
In the original paper introducing the concept of diffusion curves, Orzan ''et al.'' describe two main motivations for them.Freehand drawing
Artists traditionally begin by sketching lines and shapes that represent the major, and some of the lesser, colour boundaries of the envisioned work. The use of diffusion curves supports this practice accurately: as color would be added later, up to and between these sketched lines, so the lines' color values are specified and their 'diffusion-like' behaviors produce an image in a manner similar to the way a traditional artist works with brushes or other media.Encoding and editing images
Most color and tone variations within an image, whether manually drawn or photographically generated, originate at or are caused by edges. These edges may be the edges of one object in front of another or they may be texture edges, shadow borders etc. More subtle shading may also be represented as if it were caused by edges. Therefore vision analysis techniques such as edge detection integrate well with the construction of diffusion curves and so they can facilitate the vectorization of real images and their later manual editing.References
{{Computer graphics Vector graphics