A Survey on Depiction of Image using Tone and Sketch

This paper proposes a pencil drawing generating system that can create various pencil drawing styles for images, to satisfy different needs of users. The results contain various natural strokes and patterns and are structurally representative. They are accomplished by novelty combining the tone and stroke structures, which complement each other in generating visually constrained results. Prior knowledge on pencil drawing is also incorporated, making the two basic functions robust against noise, strong texture, and significant illumination variation. In light of edge, shadow, and shading information conveyance, our pencil drawing system establishes a style that artists use to understand visual data and draw them. Meanwhile, it lets the results contain rich and well-ordered lines to vividly express the original scene.