英文摘要
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Freehand sketch is a central medium employed by designers during early stages of product design. Due to the lack of sketching practices on the fundamental spatial conception construction unit - cube, freehand sketches were usually unproportionally drawn which do not match visual experience and slow down the concept development process. Furthermore, weak spatial conception leads to appearance design deviation when converting perspective drawings into orthographic drawings.
To ease this problem, a computer-aided 2-point perspective cube sketching software is developed based on a reversed 2-point station-point approach proposed by the authors. It can be used to analyze the user's drawings and provide correction instruction feedbacks, serving as the first system with these functions and an interactive learning tool for novices in product design to enhance learning effect.
Its usability was validated through a series of experiments done in real classroom setting. As a result, an average of 19.5% increase in drawing accuracy was shown in test subjects trained with the proposed system.
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