Huey-Min Sun

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Our research explores a virtual reality application based on Web camera (Webcam) input-interface. The interface can replace with the mouse to control direction intention of a user by the method of frame difference. We divide a frame into nine grids from Webcam and make use of the background registration to compute the moving object. In order to make this(More)
Technological advance in human-computer interaction has attracted increasing research attention, especially in the field of virtual reality (VR). Prior research has focused on examining the effects of VR on various outcomes, for example, learning and health. However, which factors affect the final outcomes? That is, what kind of VR system design will(More)
Most studies of smoothing video stream compute the required bit rate of video transmission to satisfy all the transmitted data. In this paper, our proposed online smoothing with tolerable data dropping algorithm can adjust the bit rate as smooth as possible. Several multimedia encoding schemes, such as advanced video coding (AVC), can support partial data(More)
Our research explores a virtual reality application based on Web camera (Webcam). The interface can replace with mouse by the frame difference method. We divide a frame into nine grids from Webcam and make use of the background registration to compute moving object. In order to apply to virtual reality system, we use Virtools Dev as the platform to build(More)
Different content characteristics and bit rates affecting the perceived quality of video has been verified in this study. We select 93 video sequences encoded/decoded by the Microsoft MPEG-4 software and make use of the Principal Component Analysis(PCA) method to find the principal component for all sequences by motion and texture characteristics. All the(More)
This study explores the effect of user and system characteristics on our proposed web-based classroom response system (CRS) by a longitudinal design. The results of research are expected to understand the important factors of user and system characteristics in the web-based CRS. The proposed system can supply interactive teaching contents, quizzes, and(More)
There are evidences to indicate that a user’s perception is affected by varying frame rate and bit rate with respect to different video content characteristics. We attempt to understand the differences of motion and texture characteristics by adopting both the objective assessment and the subjective assessment methodologies. In this paper, the peak(More)
Most algorithms of smoothing schedule compute the required bit rate of video transmission to satisfy all the transmitted data. In this paper, our proposed tolerable data dropping algorithm can adjust transmitting data to fit available bit rate. MPEG-4 with fine grained scalability (FGS) can support partial data dropping to adapt to available bandwidth(More)