Recent Submissions

  • Interview with Don Daglow re: Amnesia 

    Aycock, John (Science, Computer Science, 2019-07)
    This is an interview with Don Daglow, conducted via email between January 13 and July 2, 2019. Besides being a noted game developer himself, he produced the game Amnesia while at Electronic Arts, which was released in 1986 ...
  • Interview with Charlie Kreitzberg re: Amnesia 

    Aycock, John (Science, Computer Science, 2019-07)
    This is an interview with Charlie Kreitzberg, conducted via email between March 8 and June 20, 2019. He ran and still runs Cognetics, now Cognetics Interactive, the company that developed the game Amnesia, which was ...
  • Illustrative Multivariate Visualization for Geological Modelling 

    Rocha, Allan; Mota, Roberta Cabral Ramos; Hamdi, Hamidreza; Alim, Usman R.; Sousa, Mario Costa (Wiley, Science, Science, Computer Science, University of Calgary, University of Calgary, https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.html, 2018-07-10)
    In this paper, we present a novel illustrative multivariate visualization for geological modelling to assist geologists and reservoir engineers in visualizing multivariate datasets in superimposed representations, in ...
  • Decal-Lenses: Interactive Lenses on Surfaces for Multivariate Visualization 

    Rocha, A. C. A.; Silva, J. D.; Alim, U. R.; Carpendale, S.; Sousa, M. C. (IEEE, Science, Science, Computer Science, University of Calgary, University of Calgary, https://journals.ieeeauthorcenter.ieee.org/become-an-ieee-journal-author/guidelines-and-policies/policy-posting-your-journal-article/, 2018-06-26)
    We present decal-lenses, a new interaction technique that extends the concept of magic lenses to augment and manage multivariate visualizations on arbitrary surfaces. Our object-space lenses follow the surface geometry and ...
  • Comparative Visualizations of Noisy and Filtered Blood Flow from 4D PC-MRI Cardiac Datasets 

    Khan, Fahim Hasan; Rocha, Allan; Alim, Usman (Science, Science, Computer Science, University of Calgary, University of Calgary, 2017-10)
    Modern phase-contrast magnetic resonance imaging (PC-MRI) can acquire both cardiac anatomy and flow function in a single acquisition and deliver high quality volumetric and time-varying (4D) datasets which enable better ...
  • Compactly Supported Biorthogonal Wavelet Bases on the Body Centered Cubic Lattice 

    Horacsek, Joshua J.; Alim, Usman R. (Wiley, Science, Science, Computer Science, University of Calgary, University of Calgary, https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.html, 2017-06)
    In this work, we present a family of compact, biorthogonal wavelet filter banks that are applicable to the Body Centered Cubic (BCC) lattice. While the BCC lattice has been shown to have superior approximation properties ...
  • Decal-maps: Real-time Layering of Decals on Surfaces for Multivariate Visualization 

    Rocha, Allan; Alim, Usman; Silva, Julio Daniel; Sousa, Mario Costa (IEEE, Science, Science, Computer Science, University of Calgary, University of Calgary, https://journals.ieeeauthorcenter.ieee.org/become-an-ieee-journal-author/guidelines-and-policies/policy-posting-your-journal-article/, 2017-01)
    We introduce the use of decals for multivariate visualization design. Decals are visual representations that are used for communication; for example, a pattern, a text, a glyph, or a symbol, transferred from a 2D-image to ...
  • Compressive Volume Rendering 

    Liu, Xiaoyang; Alim, Usman R. (Wiley, Science, Science, Computer Science, University of Calgary, University of Calgary, https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.html, 2015-05)
    Compressive rendering refers to the process of reconstructing a full image from a small subset of the rendered pixels, thereby expediting the rendering task. In this paper, we empirically investigate three image order ...
  • Operator Discretization in Shift-Invariant Spaces 

    Alim, Usman R. (Science, Science, Computer Science, University of Calgary, University of Calgary, 2014-06)
  • Toward High Quality Gradient Estimation on Regular Lattices 

    Hossain, Zahid; Alim, Usman R.; Möller, Torsten (IEEE, Science, Science, Computer Science, University of Calgary, University of Calgary, https://journals.ieeeauthorcenter.ieee.org/become-an-ieee-journal-author/guidelines-and-policies/policy-posting-your-journal-article/, 2011-04)
    In this paper, we present two methods for accurate gradient estimation from scalar field data sampled on regular lattices. The first method is based on the multi-dimensional Taylor series expansion of the convolution sum ...

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