Learn More
This paper addresses the issue of 3-D motion estimation in model-based facial image coding. A new approach to estimating the motion of the head and the facial expressions is presented and has the following characteristics: 1) An affine nonrigid motion model is set up. The specific knowledge about facial shape and facial expression is formulated by this(More)
This paper presents a review of promising techniques for very low bit-rate, below 64 kb/s, image sequence coding. Image sequence coding at such low rates will be a crucial technique in forthcoming visual services, e.g., visual information transmission and storage. A typical application is to transmit moving videophone scenes through the existing analog(More)
— Sending real-time video over wireless ad-hoc networks is a challenging problem. Video is very sensitive for packet loss and wireless ad-hoc networks are error prone due to node mobility and weak links. In this paper we investigate important issues for real time video over wireless ad-hoc networks on different layers. Multi path routing has been used to(More)
There is an increasing interest in creating wearable device interaction technologies. Novel emerging user interface technologies (e.g. eye-ball tracking, speech recognition, gesture recognition, ECG, EEG and fusion of them) have the potential to significantly affect market share in PC, smartphones, tablets and latest wearable devices such as google glass.(More)
We present a hand-and-foot-based multimodal interaction approach for handheld devices. Our method combines input modalities (i.e., hand and foot) and provides a coordinated output to both modalities along with audio and video. Human foot gesture is detected and tracked using contour-based template detection (CTD) and Tracking-Learning-Detection (TLD)(More)
A touch-less interaction technology on vision based wearable device is designed and evaluated. Users interact with the application with dynamic hands/feet gestures in front of the camera. Several proof-of-concept prototypes with eleven dynamic gestures are developed based on the touch-less interaction. At last, a comparing user study evaluation is proposed(More)
— Facial expressions play an important role in every day social interaction. To enhance the daily life experience for the visually impaired, we present the Facial Expression Appearance vibroTactile System (FEATS), which uses a vibrotactile chair as the social interface for the visually impaired. An array of vibrating motors are mounted spatially on the back(More)
In this paper we describe a system to reliably localize the position of the speaker's face and mouth in videophone sequences. A statistical scheme based on a subspace method is presented for detecting human faces under varying poses. We propose a new matching criterion based on the Generalized Likelihood Ratio. The criterion is optimized efficiently with(More)