Title :
Nonlinear multiresolution techniques with applications to scientific visualization in a haptic environment
Author :
Asghar, Mohammad Waqas ; Barner, Kenneth E.
Author_Institution :
Qualcom Inc., San Diego, CA, USA
Abstract :
This paper develops nonlinear multiresolution techniques for scientific visualization utilizing haptic methods. The visualization of data is critical to many areas of scientific pursuit. Scientific visualization is generally accomplished through computer graphic techniques. Recent advances in haptic technologies allow visual techniques to be augmented with haptic methods. The kinesthetic feedback provided through haptic techniques provides a second modality for visualization and allows for active exploration. Moreover, haptic methods can be utilized by individuals with visual impairments. Haptic representations of large data sets, however, can be confusing to a user, especially if a visual representation is not available or cannot be used. This paper develops a multiresolution data decomposition method based on the affine median filter. This results in a hybrid structure that can be tuned to yield a decomposition that varies from a linear wavelet decomposition to that produced by the median filter. The performance of this hybrid structure is analyzed utilizing deterministic signals and statistically in the frequency domain. This analysis and qualitative and quantitative implementation results show that the affine median decomposition has advantages over previously proposed methods. In addition to multiresolution decomposition development, analysis, and results, haptic implementation methods are presented
Keywords :
data visualisation; haptic interfaces; natural sciences computing; rendering (computer graphics); wavelet transforms; affine median filter; computer graphics; deterministic signals; haptic methods; kinesthetic feedback; large data sets; linear wavelet decomposition; nonlinear multiresolution techniques; rendering; scientific visualization; visual impairment; Application software; Computer graphics; Data visualization; Feedback; Frequency domain analysis; Haptic interfaces; Nonlinear filters; Performance analysis; Signal analysis; Signal resolution;
Journal_Title :
Visualization and Computer Graphics, IEEE Transactions on
DOI :
10.1109/2945.910825