Xiaolong Luke Zhang

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Recent advances in interaction technologies make it possible for people to use freehand gestures in such application domains as virtual reality, augmented reality, ubiquitous computing, and smart rooms. While some applications and systems have been developed to support gesture-based interaction, it is unclear what design processes these systems have(More)
Social media data with geotags can be used to track people's movements in their daily lives. By providing both rich text and movement information, visual analysis on social media data can be both interesting and challenging. In contrast to traditional movement data, the sparseness and irregularity of social media data increase the difficulty of extracting(More)
In the context of a campus-wide strategic planning process, we have been asked to frame the special role of Penn State's Center for Human-Computer Interaction (CHCI) within the College of Information Sciences and Technology (IST). Our response is that HCI should fulfill an important role as a focus for design research within our i-school. As support for(More)
In the design of gesture-based user interfaces, continuously recognizing complex dynamic gestures is a challenging task, because of the high-dimensional information of gestures, ambiguous semantic meanings of gestures, and the presence of unpredictable non-gesture body motions. In this paper, we propose a hybrid model that can leverage the time-series(More)
Fisheye view is an effective approach to visualizing and navigating large data sets by offering both local details and global context in the same view. However, by using different magnification factors for detail and context information, fisheye view also leads to new usability issues, one of which is the focus targeting difficulty. This challenge happens(More)
Image retargeting is a technique to adapt an original image to diverse screen sizes and aspect ratios on computing devices. This paper focuses on adapting large images for a small display. Some existing methods, such as scaling, cropping, and fisheye warping, are often flawed because they may lose the necessary details of the image, scarify content(More)
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