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Theses

Computer drawing tools for assisting learners, hobbyists, and professionals

Emmanuel Iarussi 1
1 GRAPHDECO - GRAPHics and DEsign with hEterogeneous COntent
CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : The goal of this thesis is to facilitate and accelerate drawing for amateurs as well as for expert designers and illustrators, employing computer graphics, image processing and interaction techniques. As this is a broad spectrum to tackle, we identify three specific problems related to drawing and propose computer tools to help users overcome the main challenges on each domain. In Chapter 2 we present an interactive drawing tool to help beginners practice drawing-by-observation techniques. We build on a number of traditional techniques to help people gain consciousness of the shapes in a scene. We automatically extract visual guides from a model photograph and offer corrective feedback to guide their reproduction in the drawing. In Chapter 3 we propose a tool that helps users create wire wrapped jewelry. This technique of handmade jewelry can be seen as a form of line drawing with metal wires. The presented method assist the user in the main challenges of creating 2D wire-wrapped jewelry from a drawing: decomposing the input into a set of wires, and bending the wires to give them shape. In Chapter 4 we propose a method to help designers enrich their drawings with color and shading. Professionals frequently draw curvature lines to convey bending of smooth surfaces in concept sketches. We exploit this information and extrapolate curvature lines in a rough concept sketch. This extrapolation allows us to recover the intended 3D curvature and surface normal at each pixel, which we use to compute shading and texturing over the sketch.
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Emmanuel Iarussi. Computer drawing tools for assisting learners, hobbyists, and professionals. Other [cs.OH]. Université Nice Sophia Antipolis, 2015. English. ⟨NNT : 2015NICE4064⟩. ⟨tel-01247358v2⟩

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