Drawing Input Through Geometrical Constructions: Specification and Applications

This paper proposes a novel approach to 2D picture description. In this approach, points essential to specify pictures are defined through repetitive geometrical constructions, and the final image is drawn by referring to those points. The method fulfills the requirements for picture description: easiness, intuitiveness, and universality. In addition, to clarify the mechanism of drawing input, we formulate the specification of a drawing input system. To represent the relationships among points, lines, and circles, the specification uses the geometrical operations. We show the validity of drawing input through three applications: engineering drawing, apparel pattern-making, and Tibetan mandala image generation.