The contour spectrum

We introduce the contour spectrum, a user interface component that improves qualitative user interaction and provides real-time exact quanti cation in the visualization of isocontours. The contour spectrum is a signature consisting of a variety of scalar data and contour attributes, computedover the range ofscalar values w 2 <. We explore the use of surface area, volume, and gradient integral of the contour that are shown to be univariate B-spline functions of the scalar value w for multi-dimensionalunstructured triangular grids. These quantitative properties are calculated in real-time and presented to the user as a collection of signature graphs (plots of functions of w) to assist in selecting relevant isovalues w0 for informative visualization. For timevarying data, these quantitative properties can also be computed over time, and displayed using a 2D interface, giving the user an overview of the time-varying function, and allowing interaction in both isovalue and timestep. The ...

• Type: Conference
• Year: 1997
• Where: VISUALIZATION
• Authors: Chandrajit L. Bajaj, Valerio Pascucci, Daniel Schikore
• Keywords: Contour Spectrum, Qualitative User Interaction, Quantitative Properties, Visualization, VISUALIZATION 1997