Chemists often use hand-drawn structural diagrams to capture and communicate ideas about organic compounds. However, the software available today for specifying these structures to a computer relies on a traditional mouse and keyboard interface, and as a result lacks the ease of use, naturalness, and speed of drawing on paper. In response, we have developed a novel sketch-based system capable o...

As engineers, we often find ourselves spending a non-trivial amount of time converting sketched diagrams and figures into digital format. A lot of research has been done in conversion of hand-drawn sketches to computer drawings. However, most of it is domain-specific with training templates which must first demonstrate the shapes the user first intends to recognize as suggested by Kara and Stah...

When using a sketching tool to draw graphs, the edges need to appear hand-drawn. This is particularly the case after edges have been repositioned – if the action of moving a node results in its edges appearing as straight lines, the graph drawing will not retain its informal, hand-drawn appearance. The method for preserving the hand-drawn appearance of graphs described here is based on user obs...

Vectorizing hand-drawn sketches is a challenging task, which is of paramount importance for creating CAD vectorized versions for the fashion and creative workflows. This paper proposes a complete framework that automatically transforms noisy and complex hand-drawn sketches with different stroke types in a precise, reliable and highly-simplified vectorized model. The proposed framework includes ...

In applications such as architecture, early design sketches containing accurate line drawings often mislead the target audience [Schumann et al., 1996]. Approximate human-drawn sketches are typically accepted as a better way of demonstrating fundamental design concepts. To this end we have designed an algorithm that creates lines that perceptually resemble human-drawn lines. Our algorithm works...

The goal of this work is to create a robot interface that allows a novice user to guide, control, and/or program a robot to perform some task. The assumption is that, although the user may be a domain expert in how the task should be done, he is not an expert in robotics. During the actual robot use, he should focus on the task to be done rather than worrying about the robot or the interaction ...

Overtracing is the phenomenon in sketching of repeatedly drawing over previously drawn ink. It is a naturally appearing effect and is especially frequent in domains such as architectural drawings. Existing work in sketch recognition focuses on sketches with nonovertraced strokes. In this paper, we describe a method for generating geometric approximations of overtraced strokes in terms of primit...

An algorithm has been developed using Matlab that takes an image of a sketch of one or more functions, plotted on the xand yaxes, and converts it into an electronic plot, along with the set of equations and parameters that recreate the same plot. This is accomplished by extraction of the plot data, followed by data grouping based on three different heuristic methods (colour, slope and process o...