Browse Graduate Dissertations and Theses at Illinois by Contributor "Ma, Yi"

  • Hedau, Varsha (2012-02-06)
    An image is nothing but a projection of the physical world around us, where objects do not occur randomly but follow certain spatial rules. Many existing computer vision approaches tend to ignore this aspect of understanding ...

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  • Balasubramanian, Arvind (2012-06-27)
    The ubiquitous availability of high-dimensional data such as images and videos has generated a lot of interest in high-dimensional data analysis. One of the key issues that needs to be addressed in real applications is the ...

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  • Ghanem, Bernard S. (2010-05-19)
    Temporal or dynamic textures are video sequences that are spatially repetitive and temporally stationary. Dynamic textures are temporal analogs of the more common spatial texture. They are a family of visual phenomena where ...

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  • Wright, John N. (2009)
    Finally, we show how these theoretical developments lead to simple, scalable, and robust algorithms for face recognition in the presence of varying illumination and occlusion. The idea is extremely simple: seek the sparsest ...

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    application/pdfPDF (8MB)Restricted to U of Illinois
  • Sharon, Yoav (2011-01-21)
    Advancement in sensing technology is introducing new sensors that can provide information that was not available before. This creates many opportunities for the development of new control systems. However, the measurements ...

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  • Yang, Allen (2006)
    Algebraically, we study the properties of polynomials vanishing on a union of subspaces; and statistically, we study how to estimate these polynomials robustly from real sample sets with noise and outliers. These new methods ...

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    application/pdfPDF (3MB)Restricted to U of Illinois
  • Zhou, Zihan (2013-05-24)
    Driven by emergent needs in industrial applications such as film production, navigation and virtual reality, the problem of inferring 3D structures of urban scenes from 2D images has recently drawn a lot of interest in the ...

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  • Zhou, Zihan (2010-06-22)
    This thesis considers the problem of recognizing human faces despite variations in illumination, pose and contiguous occlusion, using only frontal training images. In particular, we are interested in simultaneously handling ...

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  • Wagner, Andrew (2012-02-06)
    Many classic and contemporary face recognition algorithms work well on public data sets, but degrade sharply when they are used in a real recognition system. A major cause of this is the difficulty of simultaneously handling ...

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  • Huang, Kun (2004)
    In this dissertation I study both the theoretical and practical issues in building a large scale system with distributed visual sensors. I have developed a unified algebraic approach for studying the structure-from-motion ...

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    application/pdfPDF (11MB)Restricted to U of Illinois
  • Rao, Shankar Ramamohan (2009)
    We propose a robust framework for clustering data. In practice, data obtained from real measurement devices can be incomplete, corrupted by gross errors, or not correspond to any assumed model. We show that, by properly ...

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    application/pdfPDF (2MB)Restricted to U of Illinois
  • Hong, Wei (2006)
    In this dissertation, we also address multimodal structures in textures by proposing a directional hybrid linear model, which combines linear hybrid models with directional filters and provides a deterministic representation ...

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    application/pdfPDF (4MB)Restricted to U of Illinois
  • Mobahi, Hossein (2013-02-03)
    It is well-known that global optimization of a nonconvex function, in general, is computationally intractable. Nevertheless, many objective functions that we need to optimize may be nonconvex. In practice, when working ...

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  • Yang, Jianchao (2012-02-06)
    Sparse representations account for most or all of the information of a signal by a linear combination of a few elementary signals called atoms, and have increasingly become recognized as providing high performance for ...

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