Pure Contour Drawings Using Dynamic Lines

Real world line drawings are generated by the motion of artist’s hand over a paper plane. Our system attempts to reproduce line drawings by mimicking this dynamic motion. The artist maintains his or her gaze on the underlying model, conceptualizes the shape of the line that best depict the part of the model and then with the smooth motion of his or her hand produces a line on the paper. We present a conceptual framework along with a working prototype that attempts to closely follow this real world process. The framework builds poses for the model, highlights interesting feature lines on the model, creates a representative shape of the feature line on the paper and then with the motion of a moving pen generates line drawings. The framework also provides flexibility and support for existing techniques and algorithm available in non-photorealistic rendering research, in terms of finding perceptual aids, selection of feature lines, and rendering algorithms. We provide several results from a simple prototype system following this structure that demonstrates the validity of the concept.