Chromaticity and luminance as coding dimensions in visual search
Human Factors - Special issue: visual displays
iLamps: geometrically aware and self-configuring projectors
ACM SIGGRAPH 2003 Papers
Examining mobile phone text legibility while walking
CHI '04 Extended Abstracts on Human Factors in Computing Systems
Mobile text entry: relationship between walking speed and text input task difficulty
Proceedings of the 7th international conference on Human computer interaction with mobile devices & services
Multi-user interaction using handheld projectors
Proceedings of the 20th annual ACM symposium on User interface software and technology
The effects of text structure and prior knowledge of the learner on computer-based learning
Computers in Human Behavior
Projector phone: a study of using mobile phones with integrated projector for interaction with maps
Proceedings of the 10th international conference on Human computer interaction with mobile devices and services
Evaluation of picture browsing using a projector phone
Proceedings of the 10th international conference on Human computer interaction with mobile devices and services
Workshop on coupled display visual interfaces
Proceedings of the International Conference on Advanced Visual Interfaces
Investigating selection and reading performance on a mobile phone while walking
Proceedings of the 12th international conference on Human computer interaction with mobile devices and services
PoCoMo: projected collaboration using mobile devices
Proceedings of the 13th International Conference on Human Computer Interaction with Mobile Devices and Services
Visual separation in mobile multi-display environments
Proceedings of the 24th annual ACM symposium on User interface software and technology
The effect of age and font size on reading text on handheld computers
INTERACT'05 Proceedings of the 2005 IFIP TC13 international conference on Human-Computer Interaction
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Mobile projectors are gaining momentum, with many pocket sized products reaching the market and projector phones being close to production. Although the usefulness of such devices for entertainment, collaboration as well as many other tasks is obvious, it is not yet clear how their limitations in terms of image quality, brightness and jitter due to hand motion might affect performance. To answer these questions, we conduct two experiments based on traditional psychophysical methods. Using a visual search and a text reading study we compare task performance on a mobile phone display and a mobile projector. In addition, we examine whether performance is affected when devices are handheld rather than placed on a stable surface. We find that the perceived task difficulty is worse on the mobile projector cases for both tasks, while only in the visual search task leads to quantitatively worse performance. In contrast, we find that the stability of the projection plays no role in task performance but tasks performed on a handheld device may be perceived as harder to complete.