Learn More
This paper presents a framework to automatically measure the intensity of naturally occurring facial actions. Nat-uralistic expressions are non-posed spontaneous actions. The Facial Action Coding System (FACS) is the gold standard technique for describing facial expressions, which are parsed as comprehensive, nonoverlapping Action Units (Aus). AUs have(More)
We describe a novel approach for 3D ear biomet-rics using video. A series of frames are extracted from a video clip and the region-of-interest (ROI) in each frame is independently reconstructed in 3D using Shape from Shading (SFS). The resulting 3D models are then registered using the Iterative Closest Point (ICP) algorithm. We iteratively consider each(More)
— We introduce a novel shape-based feature set, termed the Histograms of Categorized Shapes (HCS), for robust Three-Dimensional (3D) object recognition. By adopting the sliding window approach and a linear Support Vector Machine (SVM) classifier, the efficacy of the HCS feature is assessed on a 3D ear detection task. Experimental results demonstrate that(More)
This paper presents a framework to automatically estimate the gaze direction of an infant in an infant-parent face-to-face interaction. Commercial devices are sometimes used to produce automated measurement of the sub-jects' gaze direction. This approach is intrusive, requiring cooperation from the participants, and cannot be employed in interactive(More)
We present a complete, Three-Dimensional (3D) object recognition system combining local and holistic features in a computationally efficient manner. An evaluation of the proposed system is conducted on a 3D ear recognition task. The ear provides a challenging case study because of its high degree of inter-subject similarity. In this work, we focus primarily(More)
Steady increases in healthcare costs and obesity have inspired recent studies into cost-effective, assistive systems capable of monitoring dietary habits. Few researchers, though, have investigated the use of video as a means of monitoring dietary activities. Video possesses several inherent qualities, such as passive acquisition, that merits its analysis(More)
This study assessed whether specific types of object motion, which predominate in maternal naming to preverbal infants, facilitate word mapping by infants. A total of 60 full-term 8-month-old infants were habituated to two spoken words, /bæf/ and /wem/, synchronous with the handheld motions of a toy dragonfly and a fish or a lamb chop and a squiggly. They(More)
Speech is a verbal means of communication that is intrinsically bimodal: the audio signal is produced by complex mouth and corporal articulations that form the basic vocal tone into specific, decodable sounds. Both the audible and visible contents of speech carry pertinent information about what is being conveyed. The motivation behind this work is to(More)