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Reference
Detecting and Leveraging Finger Orientation for Interaction with Direct-Touch Surfaces
Feng Wang, Xiang Cao, Xiangshi Ren and Pourang Irani
UIST'09 October 4-7, 2009, Victoria, British Columbia, Canada
Summary
This paper talks about an algorithm that detects finger orientation in real-time and how this algorithm could benefit the development of applications that rely heavily in finger orientation. Users have adapted very well to multi-touch devices since it gives the user the freedom to manipulate the system without an intermediary. The authors believe knowing the finger orientation is an important piece of information. There are two types of finger touch: vertical touch (finger pointing directly downward) and oblique touch (finger touching the surface at an oblique angle. When a finger touches a surfaces it creates an elliptic shape. By examining the finger's deformation on the surface, useful information can be found such as the location of the user's palm and the direction in which the finger is pointing to. In order to test their algorithm, researchers used a tabletop surface based on FTIR technology.
Discussion
This paper was very boring in my humble opinion. I can't think of a specific application that could benefit from their research. It is interesting to read some of things they pointed out but I think the existing touch interaction is very accurate. I might be wrong but I just did not enjoy reading this paper.
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