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B. Venditti:
"Interaction in Dense One-Handed Handheld Augmented Reality";
Supervisor: H. Kaufmann, A. Mossel; Insitute for Software Technology and Interactive Systems, 2015; final examination: 2015-01-15.

The rapid improvement of handheld hardware devices enable real-time rendering of a large number
of 3D models in handheld augmented reality (AR) environments. Although there are already
many AR applications available for handheld devices, they often remain limited regarding their
degree of interactivity compared to desktop AR applications. Important interactions in AR environments
are the effortless creation of 3D models, precise selection and six-degree-of-freedom
(6DOF) manipulation of virtual objects. Due to the imprecise input of the touch interface, the
small screen size and complex touch gestures, all three interactions suffer in one-handed handheld
AR setups of different limitations. In this thesis novel one-handed handheld interaction
techniques for modeling, selection and manipulation of virtual content are introduced. A simple
polygonal modeling technique is presented that uses real-time shape detection to collect handdrawn
shapes that are used for Perspective Driven Modeling by extrusion or lathing in an AR
environment. The novel selection technique DrillSample, designed particularly for the precise
selection and disambiguation of virtual objects, is evaluated against state of the selection techniques.
DrillSample is inspired of taking a core sample, e.g. of earth sediments, and designed
with a focus on simple touch input and virtual context preservation. Two new and competing
manipulation techniques, 3DTouch and HOMER-S, for the intuitive translation, rotation and
scaling of virtual objects are introduced. 3DTouch focuses on simple touch input and degree
of freedom separation, down to a single DOF, making the different DOF easily accessible from
different view perspectives. HOMER-S on the other hand provides integral manipulation up to
6DOF and avoids touch input completely by mapping the handheld´s device pose to the manipulated
object. Both techniques are evalulated in a thorough user study followed by a statistical
evaluation.

3D Interaction, Handheld Augemented Realiy, 3D Modeling, 3D Selection, 3D Manipulation

http://publik.tuwien.ac.at/files/PubDat_237039.pdf