Browsing Computer Science by Author "Yuan, Quan"

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Browsing Computer Science by Author "Yuan, Quan"

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  • Automatic 2D Hand Tracking in Video Sequences
    Yuan, Quan; Sclaroff, Stan; Athitsos, Vassilis (Boston University Computer Science Department, 2004-11-02)
    In gesture and sign language video sequences, hand motion tends to be rapid, and hands frequently appear in front of each other or in front of the face. Thus, hand location is often ambiguous, and naive color-based hand ...
  • Face Identification by a Cascade of Rejection Classifiers
    Yuan, Quan; Thangali, Ashwin; Sclaroff, Stan (Boston University Computer Science Department, 2005-06-10)
    Nearest neighbor search is commonly employed in face recognition but it does not scale well to large dataset sizes. A strategy to combine rejection classifiers into a cascade for face identification is proposed in this ...
  • Is a Detector Only Good for Detection?
    Yuan, Quan; Sclaroff, Stan (Boston University Computer Science Department, 2009-07-12)
    A common design of an object recognition system has two steps, a detection step followed by a foreground within-class classification step. For example, consider face detection by a boosted cascade of detectors followed by ...
  • Learning a Family of Detectors
    Yuan, Quan (Boston University Computer Science Department, 2009-06-30)
    Object detection and recognition are important problems in computer vision. The challenges of these problems come from the presence of noise, background clutter, large within class variations of the object class and limited ...
  • Multiplicative Kernels: Object Detection, Segmentation and Pose Estimation
    Yuan, Quan; Thangali, Ashwin; Ablavsky, Vitaly; Sclaroff, Stan (Boston University Computer Science Department, 2008-06)
    Object detection is challenging when the object class exhibits large within-class variations. In this work, we show that foreground-background classification (detection) and within-class classification of the foreground ...
  • Parameter Sensitive Detectors
    Yuan, Quan; Thangali, Ashwin; Ablavsky, Vitaly; Sclaroff, Stan (Boston University Computer Science Department, 2007)
    Object detection can be challenging when the object class exhibits large variations. One commonly-used strategy is to first partition the space of possible object variations and then train separate classifiers for each ...
  • Simultaneous Localization and Recognition of Dynamic Hand Gestures
    Alon, Jonathan; Athitsos, Vassilis; Yuan, Quan; Sclaroff, Stan (Boston University Computer Science Department, 2004-03-08)
    A framework for the simultaneous localization and recognition of dynamic hand gestures is proposed. At the core of this framework is a dynamic space-time warping (DSTW) algorithm, that aligns a pair of query and model ...

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