LEIF Exchange: Projects

David Lindlbauer

  • involved student David Lindlbauer  →
  • type of project Student Exchange Project
  • period of time 2012/05–2012/09
  • exchange from Upper Austria University of Applied Sciences (Media Interaction Lab) to University of Waterloo (Collaborative Systems Laboratory)
  • supervisors Prof. Michael Haller,
    Prof. Mark Hancock,
    Prof. Stacey Scott

Perceptual Grouping: Selection Assistance for Digital Sketching

Modifying a digital sketch may require multiple selections before a particular editing tool can be applied. Especially on large interactive surfaces, such interactions can be fatiguing. Accordingly, we propose a method, called Suggero, to facilitate the selection process of digital ink. Suggero identifies groups of perceptually related drawing objects. These "perceptual groups" are used to suggest possible extensions in response to a person’s initial selection. Two studies were conducted. First, a background study investigated participant’s expectations of such a selection assistance tool. Then, an empirical study compared the effectiveness of Suggero with an existing manual technique. The results revealed that Suggero required fewer pen interactions and less pen movement, suggesting that Suggero minimizes fatigue during digital sketching.

The goals of this project are:

  • Gain insights about human perception and visual grouping and apply this principles to algorithms
  • Create selection tool for easier handling of object selection in digital sketches
  • Gain insights into usage of developed tool by conducting a controlled lab study

Full Paper @ ITS '13: http://dx.doi.org/10.1145/2512349.2512801