Publication statistics

Pub. period:2009-2012
Pub. count:5
Number of co-authors:8



Co-authors

Number of publications with 3 favourite co-authors:

Thorsten Karrer:5
Jan Borchers:5
Florian Heller:3

 

 

Productive colleagues

Moritz Wittenhagen's 3 most productive colleagues in number of publications:

Jan Borchers:38
Thorsten Karrer:13
Rainer Malaka:6
 
 
 

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Moritz Wittenhagen

 

Publications by Moritz Wittenhagen (bibliography)

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2012
 
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Walther-Franks, Benjamin, Herrlich, Marc, Karrer, Thorsten, Wittenhagen, Moritz, Schroder-Kroll, Roland, Malaka, Rainer and Borchers, Jan (2012): Dragimation: direct manipulation keyframe timing for performance-based animation. In: Proceedings of the 2012 Conference on Graphics Interface 2012. pp. 101-108. Available online

Getting the timing and dynamics right is key to creating believable and interesting animations. However, using traditional keyframe animation techniques, timing is a tedious and abstract process. In this paper we present Dragimation, a novel technique for interactive performative timing of keyframe animations. It is inspired by direct manipulation techniques for video navigation that leverage the natural sense of timing all of us possess. We conducted a user study with 27 participants including professional animators as well as novices, in which we compared our approach to two other interactive timing techniques, timeline scrubbing and sketch-based timing. Dragimation is comparable regarding objective error measurements to the sketch-based approach and significantly better than scrubbing and is the overall preferred technique by our test users.

© All rights reserved Walther-Franks et al. and/or their publisher

2011
 
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Karrer, Thorsten, Wittenhagen, Moritz, Lichtschlag, Leonhard, Heller, Florian and Borchers, Jan (2011): Pinstripe: eyes-free continuous input on interactive clothing. In: Proceedings of ACM CHI 2011 Conference on Human Factors in Computing Systems 2011. pp. 1313-1322. Available online

We present Pinstripe, a textile user interface element for eyes-free, continuous value input on smart garments that uses pinching and rolling a piece of cloth between your fingers. The input granularity can be controlled in a natural way by varying the amount of cloth pinched. Pinstripe input elements physically consist of fields of parallel conductive lines sewn onto the fabric. This way, they can be invisible, and can be included across large areas of a garment. Pinstripe also addresses several problems previously identified in the placement and operation of textile UI elements on smart clothing. Two user studies evaluate ideal placement and orientation of Pinstripe elements on the users' garments as well as acceptance and perceived ease of use of this novel textile input technique.

© All rights reserved Karrer et al. and/or their publisher

 
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Heller, Florian, Lichtschlag, Leonhard, Wittenhagen, Moritz, Karrer, Thorsten and Borchers, Jan (2011): Me hates this: exploring different levels of user feedback for (usability) bug reporting. In: Proceedings of ACM CHI 2011 Conference on Human Factors in Computing Systems 2011. pp. 1357-1362. Available online

User feedback for deployed software systems ranges from simple one-bit-feedback to full-blown bug reports. While detailed bug reports are very helpful for the developers to track down problems, the expertise and commitment required from the user is high. We analyzed existing user report systems and propose a flexible and independent hard- and software architecture to collect user feedback. We report our results from a preliminary two-week user study testing the system in the field and discuss challenges and solutions for the collection of multiple levels of user feedback through different modalities.

© All rights reserved Heller et al. and/or their publisher

2010
 
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Karrer, Thorsten, Wittenhagen, Moritz, Heller, Florian and Borchers, Jan (2010): Pinstripe: eyes-free continuous input anywhere on interactive clothing. In: Proceedings of the 2010 ACM Symposium on User Interface Software and Technology 2010. pp. 429-430. Available online

We present Pinstripe, a textile user interface element for eyes-free, continuous value input on smart garments that uses pinching and rolling a piece of cloth between your fingers. Input granularity can be controlled by the amount of cloth pinched. Pinstripe input elements are invisible, and can be included across large areas of a garment. Pinstripe thus addresses several problems previously identified in the placement and operation of textile UI elements on smart clothing.

© All rights reserved Karrer et al. and/or their publisher

2009
 
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Karrer, Thorsten, Wittenhagen, Moritz and Borchers, Jan (2009): PocketDRAGON: a direct manipulation video navigation interface for mobile devices. In: Proceedings of 11th Conference on Human-computer interaction with mobile devices and services 2009. p. 47. Available online

We present PocketDRAGON, a demonstrator prototype that allows direct manipulation video navigation on mobile touchscreen devices. In contrast to traditional video navigation techniques, PocketDRAGON does not require any overlay UI elements that occupy valuable screen real estate and obstruct the users' view on the video. Also, direct manipulation video navigation techniques have been shown to compare favorably to the established timeline slider interfaces in terms of performance times, intuitiveness, precision, and perceived ease of use. Our demonstrator system still uses a backend server for the computationally expensive parts of the algorithms but delivers the full-fledged user experience on the mobile device.

© All rights reserved Karrer et al. and/or their publisher

 
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