Browsing by Author "Hoppe, Matthias"

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Open Access
Adjusting virtual worlds to real world feedback limitations while using quadcopters
(2017) Hoppe, Matthias
The current development of Virtual Reality technologies are mostly focused on providing deeper immersion by improving displays and 3D audio quality. The influence of interaction and haptic feedback is often neglected. State-of-the-art technologies are still adapting gamepads and forcing the user to hold controllers that give haptic feedback by simply applying vibration. Such interaction and haptic feedback methods are therefore inducing less presence on the user. We suggest a method of combining hands free hand tracking and providing haptic feedback by utilising quadcopters as a feedback device. We reviewed haptic quadcopter feedback by conducting three user studies to validate the quality of quadcopter feedback, explore the ability to simulate various objects and explore additional feedback methods for simulating objects with extreme properties. We found that haptic feedback provided by quadcopters in combination with hand tracking is a feasible improvement of providing feedback. Furthermore, haptic quadcopter feedback is well received while simulating interaction with small, light object or objects with a soft surface. In cases of non-moving, solid objects additional feedback methods can be applied to increase the resistance felt by the user. While limitations have to be kept in mind when it comes to designing virtual worlds to include quadcopter feedback, we see it as a suitable way of providing flexible, three-dimensional, hands-free, haptic feedback.
Open Access
Exploring the design space of programming by demonstration with context aware assistive systems
(2014) Hoppe, Matthias
Due to the recent development in head-mounted displays, projection systems, rising capabilities of Augmented Reality and availability of Kinect for depth images, the advance of assistive systems in industrial context began. We propose a system that not only provides methods to assist industrial workers in their everyday tasks by assisting and providing instructions and giving feedback about the executed tasks. But although present a system that provides the capability to record and therefore create instructions by demonstration. This tackles the problem of current assistive systems and the complexity editors that are used for creating these instructions. We conducted a study that involved the creating of instruction via different conditions that were performed by experts in the field of manual assembly. Furthermore we verified these instruction with 51 industrial workers that completed assembly tasks guided by the instruction. Our results indicated that interactive instructions created through Programming by Demonstration are equal to existing approaches. Additional qualitative feedback showed that instructions through Programming by Demonstration are generally well perceived.