• Adaptive Silhouette Extraction and Human Tracking in Complex and Dynamic Environments 

    Chen, Xi; He, Zhihai, 1973-; Anderson, Derek T., 1979-; Keller, James M.; Skubic, Marge (IEEE, 2006-10)
    Extracting a human silhouette from an image is the enabling step for many high-level vision processing tasks, such as human tracking and activity analysis. Although there are a number of silhouette extraction and human ...
  • Adaptive Silhouette Extraction In Dynamic Environments Using Fuzzy Logic 

    Chen, Xi; He, Zhihai, 1973-; Keller, James M.; Anderson, Derek T., 1979-; Skubic, Marge (IEEE, 2006-07)
    Extracting a human silhouette from an image is the enabling step for many high-level vision processing tasks, such as human tracking and activity analysis. In a previous paper, we addressed some of the challenges in ...
  • Lossless Image Compression Using Super-Spatial Structure Prediction 

    Zhao, Xiwen Owen; He, Zhihai, 1973- (IEEE, 2010-04)
    We recognize that the key challenge in image compression is to efficiently represent and encode high-frequency image structure components, such as edges, patterns, and textures. In this work, we develop an efficient ...
  • Peak Transform for Efficient Image Representation and Coding 

    He, Zhihai, 1973- (IEEE, 2007-07)
    In this work, we introduce a nonlinear geometric transform, called peak transform (PT), for efficient image representation and coding. The proposed PT is able to convert high-frequency signals into low-frequency ones, ...
  • Reliability Analysis for Global Motion Estimation 

    Chung, Yu-Chia, 1979-; He, Zhihai, 1973- (IEEE, 2009-11)
    Global motion estimation (GME) is the enabling step for many important video exploitation tasks. In this work, we focus on indirect GME methods which have low computational complexity. Typically, an indirect GME method ...